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Sewer Inspection/Cleaning i 10/2017
S:\0218_Richmond\WW Eng Services 02188\BG-032 Annual Sewer Inspection\22 Specs\22.03 Final Design\_TOC.docx
TABLE OF CONTENTS
Annual Sewer Inspection and Cleaning Services - Sewer Collection System
Engineers
GREELEY AND HANSEN LLC
9020 Stony Point Parkway, Suite 475
Richmond, VA 23235
Environ-Civil Engineering, Ltd.
501 East Franklin Street, Suite 527
Richmond, VA 23219
Project Manual and Specifications
DIVISION 1 - GENERAL REQUIREMENTS
Summary of Work 01011
Contractor’s Use of Premises 01012
Change Order and Work Order Procedures 01035
Project Coordination 01040
Abbreviations and Symbols 01070
Reference Standards 01072
Definitions 01073
Measurement and Payment 01150
Submittals 01300
Progress Schedule 01325
Testing Laboratory Services Furnished by Contractor 01411
Temporary Facilities and Controls 01500
Waste Material Disposal 01564
Storage of Materials 01611
DIVISION 2 - SITEWORK
Erosion and Sediment Control 02010
Clearing, Grubbing and Site Restoration 02110
Bypass Pumping 02150
Excavation and Backfill 02220
Restoration of Pavement 02513
Television Inspection 02651
Sewer Manhole Inspection 02652
Sewer Inspection/Cleaning ii 10/2017
Sewer Smoke Testing 02653
Sewer Dyed-Water Testing 02654
Sewer Laser Profiling and 3D Laser Scanning 02655
Sewer Sonar Inspection 02656
Cleaning of Sewers 02760
DIVISION 3 - CONCRETE
Not Used
DIVISION 4 - MASONRY
Not Used
DIVISION 5 - METALS
Not Used
DIVISION 6 - WOOD AND PLASTICS
Not Used
DIVISION 7 - THERMAL AND MOISTURE PROTECTION
Not Used
DIVISION 8 - DOORS AND WINDOWS
Not Used
DIVISION 9 - FINISHES
Not Used
DIVISION 10 - SPECIALTIES
Not Used
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DIVISION 11 - EQUIPMENT
Not Used
DIVISION 12 - FURNISHINGS
Not Used
DIVISION 13 - SPECIAL CONSTRUCTION
Not Used
DIVISION 14 - CONVEYING SYSTEMS
Not Used
DIVISION 15 - MECHANICAL
Not Used
DIVISION 16 - ELECTRICAL
Not Used
Sewer Inspection/Cleaning iv 10/2017
Sewer Inspection/Cleaning 01011-1 10/2017
SECTION 01011
SUMMARY OF WORK
PART 1 GENERAL
1.1 DESCRIPTION OF WORK
A. The City of Richmond (OWNER) under this contract may assign work in the
sanitary, storm, or combined collections system. The collection system work may
consist of, but is not limited to, providing all materials, equipment, labor,
supervision, and associated site work, complete with all other appurtenances and
related work required to complete CCTV inspection and cleaning, smoke testing,
dyed-water testing, laser profiling, lateral inspection and sonar inspection in
pipelines, manholes and associated structures of the OWNER’s sanitary, storm,
and combined sewer systems. The work includes locating and marking point
locations where the camera cannot pass or where the sewer is in imminent danger
of collapse.
The work also includes providing access to the sewer pipes and manholes for
cleaning, inspection, and future maintenance. This may include, but is not limited
to, clearing and grubbing, locating and raising manhole frames and covers, and
related work. Preparation of pipe may include extensive trimming of protruding
sewer taps.
B. The summary of the Work described in the statement of work is an overall
summary of the responsibilities of the CONTRACTOR and its relation to the
OWNER. It does not supersede the specific requirements of the other Contract
Documents.
C. The OWNER under this contract may assign work in the following ways:
1. Linear Feet (Unit of Measure) Work Assignments: The OWNER may issue
linear feet (Unit of Measure) work assignments for Light Sewer Cleaning,
Heavy Sewer Cleaning, Survey Television Inspection, Chemical Root
Treatment and Chemical Grease Treatment, Flooded Sewer Dyed-Water
Test, Laser Profiling, Lateral Inspection and Sonar Inspection based on pipe
size. These work assignments may include Clearing, Grubbing and Site
Restoration, and this bid item will be paid separately from the Linear Feet
bid items. The work will be in the OWNER’s sanitary, storm, and combined
sewer systems. These will be routine assignments completed during
Regular Business Hours. Regular Business Hours are defined as between the
hours of 7:00 am to 5:00 pm EST. The OWNER may allow the
CONTRACTOR to work on these projects after 5:00 pm but only with prior
Sewer Inspection/Cleaning 01011-2 10/2017
authorization by the OWNER. No overtime payments will be paid for work
after 5:00 pm as requested by the CONTRACTOR. The CONTRACTOR
will not be allowed to invoice at hourly rates for work assigned by the
OWNER based on the linear foot and pipe size bid items.
2. Quantity (Unit of Measure) Work Assignments: The OWNER may issue
quantity (unit of measure) work assignments for Manhole Inspection, Sewer
Smoke Testing, Sewer Dyed-Water Testing, Trimming Protruding Taps and
Manhole Frames and Covers. These work assignments may include
Manhole Frame Risers, and this bid item will be paid separately at the bid
item rate only. The work will be in the OWNER’s sanitary, storm, and
combined sewer systems. These will be routine assignments completed
during Regular Business Hours. Regular Business Hours are defined as
between the hours of 7:00 am to 5:00 pm EST. The OWNER may allow the
CONTRACTOR to work on these projects after 5:00 pm but only with prior
authorization by the OWNER. No overtime payments will be paid for work
after 5:00 pm as requested by the CONTRACTOR. The CONTRACTOR
will not be allowed to invoice at hourly rates for work assigned by the
OWNER based on the linear foot and pipe size bid items.
3. Hourly Work (Unit of Measure) Assignments: The OWNER may issue
hourly work (Unit of Measure) work assignments in the collection system.
The work will include Combination Vacuum/Jet Truck and Crew, CCTV
Truck and Crew based on the regular, overtime, and emergency bid items.
These work assignments may include Clearing, Grubbing and Site
Restoration, Chemical Root Treatment, Chemical Grease Treatment, Bypass
Pumping and these bid items will be paid separately at the bid item rates
only. These assignments will be completed based on regular, overtime, and
emergency hours as follows:
a. Regular Business Hours: Work may be either prearranged by the
OWNER or by notification on the day of the assignment. Regular
Business Hours are defined as between the hours of 7:00 am to 5:00
pm EST Monday through Friday, less meal breaks. The OWNER, by
notification on the day of the assignment, requires the
CONTRACTOR to begin the work within 2 hours. The
CONTRACTOR may only invoice for time spent on the project site.
Travel time will not be billable.
b. Overtime Hours: Work may be either prearranged by the OWNER or
by notification on the day of the assignment. Overtime Hours are
defined as between the hours of 5:01 pm to 6:59 am EST Monday
through Sunday, less meal breaks. The OWNER, by notification on
the day of the assignment, requires the CONTRACTOR to begin the
work within 2 hours unless the project is a continuation of a regular
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hours assignment. The OWNER will allow the CONTRACTOR to
charge at overtime rates for hourly work assignments that continue
past 5:00 pm with prior authorization only. The CONTRACTOR may
only invoice for time spent on the project site. Travel time will not be
billable.
c. Emergency Hours: The OWNER will assign emergency hourly work
by notification on the day of the assignment. Emergency Hours are
defined as between the hours of 5:01 pm to 6:59 am EST Monday
through Sunday, less meal breaks. The OWNER, by notification on
the day of the assignment, requires the CONTRACTOR to be on the
project site within 1 hour and have begun the work within 2 hours of
the initial notification. The CONTRACTOR may only invoice for
time spent on the project site. Travel time will not be billable.
Emergency hourly rates will continue only until 7:00 am of the next
day when regular hourly rates will resume.
D. The locations and estimated costs of the various projects are unknown. No
guarantee can be made as to the number or size of projects that may be assigned
under this contract. Quantities shown on the bid sheets shall not be construed to
represent the amount of work to be done under this contract, but rather they are to
be used only for the purpose of evaluation of bids.
E. If requested by the OWNER, perform any related extra work not covered in the
specifications, which may arise during construction on the basis of lump sum price
negotiated between the CONTRACTOR and the OWNER for said extra work.
1.2 CONTRACTS
A. The OWNER reserves the right to make multiple awards. Contractors will be
rated as the lowest responsive, responsible bidder, second responsive, responsible
bidder, and so on, based on the price and number of crews submitted in response
to the Invitation for Bids. The primary contractor will be given the first
opportunity to perform jobs available under this contract. When the primary
contractor has as many crews working as stated in his bid and an additional job is
authorized, such job will be first offered to that CONTRACTOR. If he declines
the offer, this additional job will be offered to the second contractor. This
procedure will be followed for each successive contractor.
If a CONTRACTOR fails to start performance of the work after notification to
proceed as follow in the following table, such failure shall be considered a breach
of this contract and the said job shall be offered to the next contractor in line to
receive assignment.
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Assignment Type
Time to Start Assignment
After Notification
Linear Feet Work (Unit of Measure) Two Weeks
Quantity Work (Unit of Measure) Two Weeks
Hourly Work (Unit of Measure),
Regular Hours Two Hours
Hourly Work (Unit of Measure),
Overtime Hours Two Hours
Hourly Work (Unit of Measure),
Emergency Hours One Hour
Once a job is authorized, the OWNER shall determine the required starting date.
If the CONTRACTOR has fewer crews working than stated in his bid, he may
start jobs given to him prior to the required starting date as approved by the
OWNER. This will in no way allow the CONTRACTOR to delay the required
starting date of any job.
If requested by the OWNER, perform any related extra work for the assignment
not covered by plans and specifications which may arise during Linear Feet Work
(Unit of Measure), Quantity Work (Unit of Measure), Hourly Work (Unit of
Measure), or emergency repairs on the basis of a lump sum price negotiated
between the CONTRACTOR and the OWNER for said extra work.
1.3 WORK BY OTHERS
A. Work by OWNER:
1. Adjustment of fire hydrants, gas or water lines.
2. Installation or relocation of traffic signal equipment.
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
Sewer Inspection/Cleaning 01012-1 10/2017
SECTION 01012
CONTRACTOR’S USE OF PREMISES
PART 1 GENERAL
1.1 DESCRIPTION
A. Rights-of-Way
1. Confine access, operations and storage areas to rights-of-way provided by
OWNER.
2. Make all necessary arrangements, at no additional cost to the OWNER, for
temporary use of private properties. Indemnify and hold harmless the
OWNER against claims or demands arising from such use of properties
outside of rights-of-way.
3. Restrict total length which materials may be distributed along the route of
the construction at any one time to 1,000 linear feet unless otherwise
approved in writing by the OWNER.
B. Properties outside of Rights-of-Way
1. Permanent altering of properties adjacent to and along rights-of-way will not
be permitted.
2. Any damage to properties outside of rights-of-way shall be repaired or
replaced to the satisfaction of the OWNER at no additional cost to the
OWNER.
C. Use of Site
1. Assume full responsibility for protection and safekeeping of products stored
on and off premises.
2. Move stored products that interfere with the operations of OWNER or
another CONTRACTOR.
3. Obtain approvals of governing authorities prior to impeding or closing
public roads or streets. Do not close more than two consecutive
intersections at one time.
Sewer Inspection/Cleaning 01012-2 10/2017
4. Notify the OWNER 48 hours prior to closing a street or a street crossing.
Obtain permits required for street closures in advance.
5. Notify the OWNER immediately prior to closing a street or a street crossing
during emergency work
6. Maintain access for emergency vehicles including access to fire hydrants.
7. Avoid obstructing drainage ditches or inlets; when obstruction is
unavoidable due to requirements of the Work, provide grading and
temporary drainage structures to maintain unimpeded flow.
8. Perform daily clean up of dirt, debris, scrap materials, and other disposable
items inside and outside the construction zone. Keep streets, driveways, and
sidewalks clean of dirt, debris and scrap materials. Do not leave building,
roads, streets or other project areas unclean overnight. Any costs incurred
by the OWNER due to the CONTRACTOR’s failure to clean up the site
will be deducted from the CONTRACTOR’s final invoice.
9. Obtain and pay for all additional storage or work areas required for
CONTRACTOR’S operations.
D. Notification to Adjacent Occupants
1. Notify individual occupants in areas to be affected by the Work of the
proposed construction and time schedule. Notification shall be not less than
48 hours or more than 2 weeks prior to work being performed within 200
feet of the homes or businesses. All public notification activities shall be
coordinated through OWNER personnel. The OWNER will provide a
sample door hanger showing form and content to be followed.
2. Notify individual occupants in areas to be affected by the emergency Work
immediately after coordinating plan of action. Continue to update individual
occupants as emergency plans change and work progresses. All public
notification activities shall be coordinated through OWNER personnel.
E. Public, Temporary, and Project Roads and Ramps
1. Construct and maintain temporary detours to provide for normal public
traffic flow when use of public roads or streets is closed by necessities of the
Work. Notify and obtain approval of City’s traffic engineer.
2. Provide mats or other means to prevent overloading or damage to existing
roadways from tracked equipment or exceptionally large or heavy trucks or
equipment.
Sewer Inspection/Cleaning 01012-3 10/2017
F. Excavation in Streets and Driveways
1. Avoid hindering or needlessly inconveniencing public travel on a street or
any intersecting alley or street for more than two blocks at any one time,
except by permission of the OWNER.
2. Obtain the OWNER’s approval when the nature of the Work requires
closing of an entire street. Obtain permits required for street closure. Avoid
unnecessary inconvenience to abutting property owners.
3. Open each block for public use as work in that block is complete.
4. Avoid obstructing driveways or entrances to private property.
5. Provide temporary crossing to minimize the duration of obstruction when
drives or entrances are required by the Work to be blocked.
G. Maintenance and Protection of Traffic
1. Public Roadways:
a. Maintain traffic control as it is described in the City of Richmond’s
Work Area Traffic Control Handbooks, Volumes I and II, the General
Conditions, Special Provisions and as described herein. Where an
apparent conflict occurs between the handbooks, the General
Conditions, Special Provisions and the requirements of this Section,
the handbooks govern. The handbooks are available at the Bureau of
Traffic Engineering, 900 East Broad Street, Richmond, Virginia
23219.
b. Submit a Traffic Control Plan to the OWNER prior to work.
c. When required to cross, obstruct or temporarily close a street or
trafficway, provide and maintain suitable bridges, detours or other
approved temporary means for the accommodation of traffic.
Closings shall be for the shortest time practical, and passage shall be
restored immediately after completion of Project work.
d. Provide the required advance notice of proposed operations to the fire
and police departments.
e. Provide reasonable notice to owners or tenants of private property
who may be affected by the operations. All public notification
activities shall be coordinated through OWNER’s personnel.
Sewer Inspection/Cleaning 01012-4 10/2017
f. Provide signs, signals, barricades, flares, lights and all other
equipment, service and personnel required to regulate and protect all
traffic, and warn of hazards. All such work shall conform to
requirements of the OWNER. Coordinate activities with the
OWNER. Remove temporary equipment and facilities when no
longer required; restore grounds to original, or to specified
conditions.
g. Maintain at all times a 10-foot-wide all-weather lane adjacent to work
areas which shall be kept free of equipment and debris and shall be
for the use of emergency vehicles, or as otherwise provided in the
traffic control plan.
h. Prevent obstruction of the normal flow of traffic from 7 a.m. to 9 a.m.
and 4 p.m. to 6 p.m. on designated major roadways or as directed by
the OWNER.
i. Cleanliness of Surrounding Streets:
(1) Keep streets used for entering or leaving the job area free of
material, debris, and any foreign material resulting from project
operations.
2. Residential Entrances:
a. Maintain local driveway access to residential and commercial
properties adjacent to work areas at all times.
3. Traffic Signals and Signs:
a. Provide and operate traffic control and directional signals required to
direct and maintain an orderly flow of traffic in all areas under
CONTRACTOR's control, or affected by CONTRACTOR's
operations. All such work shall conform to the requirements in the
Virginia Department of Transportation (VDOT) Standards.
b. Provide traffic control and directional signs, mounted on barricades
or standard posts:
(1) At each change of direction of a roadway and at each
crossroad.
(2) At detours and hazardous areas.
(3) At parking areas.
Sewer Inspection/Cleaning 01012-5 10/2017
4. Flagpersons:
a. Provide certified and suitably equipped flagpersons when
construction operations encroach on traffic lanes, as required for
regulation of traffic and in accordance with the requirements of the
OWNER.
b. Where a railroad flagperson is required, it is the CONTRACTOR’s
responsibility to coordinate with the City the days when they will be
working within or adjacent to the railroad. The City will coordinate
the initial contact with the railroad company and the contractor will
be responsible to coordinate daily activities with the flagperson.
5. Flares and Lights:
a. Provide flares and lights during periods of low visibility:
(1) To clearly delineate traffic lanes, to guide traffic and to warn of
hazardous areas.
(2) For use by flagpersons in directing traffic.
b. Provide illumination of critical traffic and parking areas.
6. Parking Control:
a. Control all CONTRACTOR related vehicular parking within the
limits of the Work to preclude interference with public traffic or
parking, access by emergency vehicles, OWNER’s operations, or
construction operations. CONTRACTOR related vehicular parking is
not to be within median strips unless approved by the OWNER.
CONTRACTOR related vehicular parking within median strips shall
be allowed when the Work is within the median strip. Provide
temporary parking facilities for the public as may be required because
of construction or operations.
b. Monitor parking of all construction and private vehicles:
(1) Maintain free vehicular access to and through parking areas.
(2) Prohibit parking on or adjacent to access roads, or in non-
designated areas.
Sewer Inspection/Cleaning 01012-6 10/2017
7. Site Control
a. CONTRACTOR personnel to remain at all times at open project site.
This includes, but is not limited to all break times.
H. Site Restoration
1. Provide site restoration as specified in Section 02110 – Clearing, Grubbing
and Site Restoration.
I. City Water
1. The CONTRACTOR shall obtain water required for cleaning by connection
to City fire hydrants, provided the connection is made in accordance with
City requirements. Provide notice to City Agencies prior to withdrawing
water from the hydrants. The CONTRACTOR shall obtain a portable water
meter from the City’s Department of Public Utilities and attach a RPZ
backflow preventer to the meter in accordance with City standards. A
$500.00 deposit for the meter is paid to the City’s Department of Public
Utilities. The contractor will pay the Department of Public Utilities for
water usage at established rates. Contact the City’s Department of Public
Utilities, Special Billing department (804 646-5270) for current water rates.
Support meter and backflow preventer so as to not damage hydrants. Be
responsible for any damage resulting from improper operation of hydrants.
Do not use or obstruct a fire hydrant when there is a fire in the area.
Remove water meters, fittings, and piping from fire hydrants at the end of
each working day.
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
Sewer Inspection/Cleaning 01035-1 10/2017
SECTION 01035
CHANGE ORDER AND WORK ORDER PROCEDURES
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Definitions
B. Change Orders
C. Work Orders
1.2 DEFINITIONS
A. Change Order: A document which is signed by the CONTRACTOR and OWNER
and authorizes an addition, deletion, or revision in the work or an adjustment in
the Contract Price or the Contract Times, issued on or after the effective Date of
the Agreement.
B. Work Order: Work Order is a written directive to the CONTRACTOR issued on or
after the effective date of the agreement; signed by the OWNER, ordering an
addition, deletion, or revision in the Work.
1.3 CHANGE ORDERS
A. Initiation of Proposals:
1. From time to time, the OWNER may issue a Request for a Change Order
Proposal. The Request will contain a description of the intended change
with supplementary or revised Drawings and Specifications as applicable,
and the projected time for accomplishing the change.
2. The CONTRACTOR may propose a change in the Work by submittal of a
Change Order Request to the OWNER describing the proposed change with
a statement of the reason for the change and the effect on the Contract time
and price, along with supporting documentation.
3. Change Orders shall be in accordance with the PART 2 – GENERAL
CONDITIONS OF THE CONTRACT.
Sewer Inspection/Cleaning 01035-2 10/2017
B. Execution of Change Order Proposal:
1. When a Proposal is requested for changed work, submit proposal within 14
days following receipt of the Request from OWNER. State the increase or
decrease, if any, in Contract Completion Time and Contract Price.
2. Explain proposal in sufficient detail to permit review by OWNER.
3. For Omitted Work the decrease in the Contract Price will be determined by
the OWNER and will include appropriate amounts for profit and overhead.
4. The OWNER will review the Proposal and may request additional
information and documentation. Provide these items upon request.
5. If the OWNER decides to proceed with the change, the OWNER will issue a
Change Order for signature first by the CONTRACTOR and then by the
OWNER.
6. CONTRACTOR to promptly complete the approved change in the Work on
receipt of the executed Change Order. Failure to sign the Change Order
does not relieve the CONTRACTOR from performing the Work if the
Change Order is signed by the OWNER.
C. Compute the cost of both additive and deductive changes in the Work in
accordance with these specifications and as follows:
1. Include, the costs of labor, foreman and operator performing or directly
supervising the changed Work on the site. Include travel and subsistence,
but only to the extent incurred.
2. To the labor cost add all net premium for Workman's Compensation, taxes
pursuant to the Federal Social Security Act, and payments required under
State and Federal unemployment laws.
3. Include rent for plant and equipment at unit rental costs for similar rentals
from an independent firm (i.e. a firm which is not owned in whole or in part
by the CONTRACTOR). If equipment is owned by CONTRACTOR or
rented from a firm in which the CONTRACTOR has an interest, calculate
the rent in accordance with the applicable provisions and terms of the
current "Cost Reference Guide for Construction Equipment" published by
Equipment Watch.
1.4 WORK ORDERS
A. Estimate: OWNER will require an estimate of cost and project schedule for
project work prior to issuance of a Work Order.
Sewer Inspection/Cleaning 01035-3 10/2017
B. Initiation by OWNER: OWNER may issue a Work Order with a Notice to
Proceed without a prior Request for a Change Order Proposal or the
CONTRACTOR's signature.
C. Notify and coordinate with OWNER on all project work schedules on a daily
basis.
D. Payment Determination: The OWNER will designate the method of determining
the amount of compensation or credit, if any, based on one of the methods
contained in these specifications.
E. Timing: Proceed with the change in the Work immediately upon receipt of the
Work Order.
F. Addition to Contract: The Work Order will be incorporated into the Contract
Documents via a Change Order at a later date.
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
Sewer Inspection/Cleaning 01035-4 10/2017
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Sewer Inspection/Cleaning 01040-1 10/2017
SECTION 01040
PROJECT COORDINATION
PART 1 GENERAL
1.1 SCOPE
A. As more fully set forth in the General Conditions, be solely responsible for
coordination of all of the Work. Supervise, direct and cooperate fully with all
Subcontractors, manufacturers, fabricators, suppliers, distributors, installers,
testing agencies and all others whose services, materials or equipment are required
to ensure completion of the Work within the Contract Time. Provide a
CONTRACTOR representative at the work site at all times if a Subcontractor is
providing the Work.
B. Cooperate with and coordinate Work with the work of any other CONTRACTOR,
utility service company or OWNER’s employees performing additional work
related to the Project at the site.
1. Notify the proper City agency at least 48 hours prior to the time set for work
involving their facilities or equipment or as otherwise directed by OWNER.
a. Department of Public Utilities: Actual adjustment of fire hydrants,
gas or water lines will be made by personnel of this Department.
C. Be responsible for damage done by others not under his jurisdiction.
D. Coordinate Work with the work of others to assure compliance with schedules.
E. Attend and participate in all project meetings and report on the progress of all
Work and compliance with schedules.
F. Provide a list of contact names and contact numbers (phone [office, work], cell
phone, pager, etc.) for regular, overtime and emergency project work. Update list
when changes occur with personnel.
Sewer Inspection/Cleaning 01040-2 10/2017
PART 2 PRODUCT
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PART 3 EXECUTION
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END OF SECTION
Sewer Inspection/Cleaning 01070-1 10/2017
SECTION 01070
ABBREVIATIONS AND SYMBOLS
PART 1 GENERAL
1.1 ABBREVIATIONS
A. Common abbreviations which may be found in the Specifications are:
alternating current a-c Fahrenheit F
ante meridiem am feet ft
ampere A feet per hour fph
average avg feet per minute fpm
feet per second fps
figure Fig
biochemical oxygen BOD flange flg
demand foot-pound ft-lb
brake horsepower bhp
British thermal unit Btu gallon gal
gallons per minute gpm
Centigrade C gallons per second gps
company Co gram g
cubic inch cu in
cubic foot cu ft Hertz Hz
cubic yard cy hour hr
cubic feet per minute cfm horsepower hp
cubic feet per second cfs
decibel db inch in.
inch-pound in.-lbdegree Centigrade (or
Celsius) (say)
20 C
identification number ID
inside diameter id
degree Fahrenheit (say) 68 F infiltration and inflow I/I
diameter diam
direct current d-c kilovolt-ampere kva
dollars $ kilowatt kw
kilowatt-hour kwhr
each ea
efficiency eff linear foot lf
liter l
manhole MH
maximum max
mercury Hg
revolutions per
minute
rpm
Sewer Inspection/Cleaning 01070-2 10/2017
milligram mg second sec
milligrams per liter mg/l specific gravity sp gr
milliliter ml square sq
millimeter mm square foot sq ft
million gallon mil square inch sq in
square yard symillion gallons per
day
mgd
standard std
minimum min standard cubic feet
per minute
scfm
total dynamic head tdhnet positive suction
head
npsh
number No.
totally-enclosed-
fan-cooled
tefc
National Pipe Threads NPT
ounce oz volt v
outside diameter od vertical foot vf
parts per million ppm
post meridiem pm
pound lb
pounds per square foot psf
pounds per square inch psi
pounds per square inch
absolute
psia
pounds per square inch
gage
psig
1.2 ORGANIZATION ABBREVIATIONS
A. Abbreviations of organizations and programs which may be used in these
Specifications are:
ACS American Chemical Society
ACI American Concrete Institute
AGMA American Gear Manufacturers Association
AIChE American Institute of Chemical Engineers
ANSI American National Standards Institute
APHA American Public Health Association
ASTM American Society for Testing and Materials
ASCE American Society of Civil Engineers
ASME American Society of Mechanical Engineers
AWWA American Water Works Association
CRSI Concrete Reinforcing Steel Institute
EPA Environmental Protection Agency
Sewer Inspection/Cleaning 01070-3 10/2017
FM Factory Mutual
HEW Department of Health, Education and Welfare
HUD Department of Housing and Urban Development
ISO Insurance Services Office
MACP Manhole Assessment and Certification Program
NASSCO National Association of Sewer Service Companies
NFPA National Fire Protection Association
NSF National Sanitation Foundation
PACP Pipeline Assessment and Certification Program
PCI Precast Concrete Institute
UL Underwriters' Laboratories, Inc.
USGS United States Geological Survey
USPHS United States Public Health Service
VDOT Virginia Department of Public Transportation
VOSH Virginia Occupational Safety and Health
WWEMA Water and Wastewater Equipment Manufacturers Association
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
Sewer Inspection/Cleaning 01070-4 10/2017
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Sewer Inspection/Cleaning 01072-1 10/2017
SECTION 01072
REFERENCE STANDARDS
PART 1 GENERAL
1.1 SCOPE
A. When a reference standard is specified, comply with requirements and
recommendations stated in that standard, except when they are modified by the
Contract Documents, or when applicable laws, ordinances, rules, regulations or
codes establish stricter standards. The latest provisions of applicable standards
shall apply to the Work, unless otherwise specified. Reference standards include,
but are not necessarily limited to, the following:
1. American Association of State Highway and Transportation Officials.
2. American Concrete Institute.
3. American Gear Manufacturers Association.
4. American National Standards Institute.
5. American Society of Mechanical Engineers.
6. American Society for Testing and Materials.
7. American Water Works Association.
8. Concrete Reinforcing Steel Institute.
9. Factory Mutual Association.
10. Virginia Occupational Safety and Health.
11. National Fire Protection Association.
12. Prestressed Concrete Institute.
13. Underwriters' Laboratories, Inc.
14. City of Richmond Department of Public Utilities, Sanitary Sewer System
Design Guidelines and Standard Specifications and Details
15. City of Richmond Department of Public Works, Standards Manual
16. All other applicable standards listed in the Specifications, and the standards
of utility service companies, where applicable.
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
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SECTION 01073
DEFINITIONS
PART 1 GENERAL
1.1 DEFINITIONS
A. As used in these specifications, the following terms shall have these assigned
meanings.
1. Approved, Authorized, Directed, Ordered, Required: When the above
words are used in these specifications without further definition the words
“by the OWNER” shall be implied.
2. Obstruction Removal: Clearing the sewer main of obstructions to allow for
CCTV, cleaning and/or rehabilitation.
3. Sewer Lines: Gravity flow pipe lines in the easement or right-of -way
which collect sanitary sewer discharges from commercial or residential
service lines and discharge into another sewer line (main or collector), lift
station, or treatment plant.
4. Service Lines: Those gravity flow sewer lines from commercial or
residential property which discharge into a sewer line.
5. Special Provisions: Special Provisions are additional instructions or
specifications and if in conflict with these General Specifications then the
requirements of the Special Provisions shall apply.
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
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SECTION 01150
MEASUREMENT AND PAYMENT
PART 1 GENERAL
1.1 DESCRIPTION
A. The items listed below beginning with Paragraph 1.7, refer to and are the same pay
items listed in the Bid Form. They constitute all of the pay items for the
completion of the Work. No direct or separate payment will be made for
providing miscellaneous temporary or accessory works, plant, services,
CONTRACTOR'S field office, layout surveys, job signs, sanitary requirements,
testing, safety devices, approval and record drawings, water supplies, power,
maintaining traffic, removal of waste, watchmen, flagman, bonds, insurance, and
all other requirements of the General Conditions. Compensation for all such
services, equipment and materials shall be included in the prices stipulated for the
unit price pay items listed herein.
B. Each unit bid price will be deemed to include an amount to be adequate to cover
CONTRACTOR's overhead and profit for each separately identified item.
1.2 UNIT PRICE PAY ITEMS
A. The estimated number of bid units for Contract Items, as listed in the Price
Schedule on the Bid Form, are approximate only and are included solely for the
purpose of comparison of Bids. The OWNER does not expressly or by implication
agree that the estimated number of units will correspond with the number of units
actually needed and reserves the right to increase or decrease any quantity or to
eliminate any quantity as the OWNER may deem necessary. Except as provided
in Paragraph 1.3, CONTRACTOR or the OWNER will not be entitled to any
adjustment in a unit bid price as a result of any change in an estimated quantity
and agrees to accept the aforesaid unit bid prices as complete and total
compensation for any additions caused by changes or alterations in the Work
ordered by the OWNER.
B. Additional Bid Items/Force Account Items - Extra Work:
1. General - Work not covered by Contract Items necessary for the completion
of the work, or proposed emergency construction may be considered as
extra work and will be paid for under terms of Additional Bid Items/Force
Account Items or, for items not listed in the Additional Bid Items, by the
change order procedure given in Section 01035 – Change Order and Work
Order Procedures.
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2. The amount paid to the CONTRACTOR as provided in the preceding
paragraphs shall be understood to include full compensation for any and all
expenses incurred by the CONTRACTOR and his Subcontractors in
connection with the Additional Bid Items/Force Account work. The
aforementioned component costs shall be as follows:
a. The cost of labor, including foremen, for the time actually engaged on
the Additional Bid Items/Force Account work. CONTRACTOR’s
workers will be compensated at the rate of their duty performed (i.e.
A foreman working as an operator would be compensated by the
OWNER as an operator.)
b. The cost of materials furnished, other than those, if any, furnished by
the OWNER, incorporated into, or necessarily used in the prosecution
of, the Additional Bid Items/Force Account work less the salvage
value of any materials salvaged upon completion of such work.
c. The cost of the use of equipment on the Additional Bid Items/Force
Account work, will be calculated at the Additional Bid Items/Force
Account Item rates. If the equipment is rented, the cost thereof shall
be considered full compensation for carrying charges and all other
related costs, and be based on the current Cost Reference Guide by
Equipment Watch. Equipment used on Additional Bid Items/Force
Account work shall be of the proper size and type. If, however,
equipment of unwarranted size or type and cost used, the cost of the
use of such equipment shall be calculated at the rental rate for
equipment of the proper size and type.
d. Additional Bid Items/Force Account Items price shall be considered
full compensation for profit, tools, plant, depreciation, overhead,
superintendence, and the costs of the bond for faithful performance
and of the bond for materials and labor.
e. The amounts paid in compliance with the United States Social
Security Act, and for Workmen’s Compensation Insurance.
f. The amounts paid in compliance with the State of Virginia Retail
Sales Act.
1.3 ADJUSTMENT OF UNIT PRICES FOR INCREASE OR DECREASE OF
ESTIMATED QUANTITIES
A. For bid items paid for on a unit price basis, increases or decreases in the quantity
of an item of Work will be determined by comparing the total payable quantity of
Work with the unit price pay items as shown in the Price Schedule.
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B. If the total payable quantity of any unit price item of Work varies from the unit
price pay items by more than 25 percent, the unit price of that item will be a
subject of review by the OWNER. Only those items which have an as-bid
computed total value of 5 percent or more of the sum of the as-bid computed total
values of all items bid are subject to review by the OWNER. If warranted, an
equitable adjustment will be made by means of a Change Order to credit the
OWNER with any reduction in cost or to compensate CONTRACTOR for any
increase in cost resulting from the change in quantity. This review of the
adjustment will be made at a time the OWNER deems reasonable and proper.
C. Payment for any unit price item of Work, which has an as-bid computed total
value of less than 5 percent of the sum of the as-bid computed total values of all
items bid, will be made at the unit price bid regardless of an increase or decrease
in quantity.
1.4 RELATED PROVISIONS
A. Payments to CONTRACTOR: Refer to General Conditions and Agreement.
B. Changes in Contract Price: Refer to General Conditions and
Section 01035 – Change Order And Work Order Procedures.
1.5 NONCONFORMANCE ASSESSMENT
A. Remove and replace the Work, or portions of the Work, not conforming to the
Contract Documents.
1.6 NONPAYMENT FOR REJECTED PRODUCTS
A. Payment will not be made for any of the following:
1. Products wasted or disposed of in a manner that is not acceptable to the
OWNER.
2. Products determined as nonconforming before or after the work are
completed.
3. Products not completely unloaded from transporting vehicle.
4. Products placed beyond the lines and levels of the required Work.
5. Products remaining on hand after completion of the Work, unless specified
otherwise.
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1.7 APPLICATION FOR PAYMENT
A. At the end of the each workday, provide the OWNER with a daily report with
equipment used, total equipment hours, personnel list and title, hours for each
employee, linear footage completed, assignment reference number and project
title. Once the OWNER signs the daily log, provide a copy to the OWNER before
leaving the site.
B. Submit via email one copy of each application for payment on the Application for
Payment form in Exhibit A.
C. Submit application for payment to the OWNER on a bi-weekly basis.
1.8 CONTRACT ITEMS
A. Contract Items 1 through 6 - Light Sewer Cleaning (Pipe Size of 6-inch to 72-
inch):
1. Description: Under the Contract Item for Light Sewer Cleaning of 6- to 72-
inch diameter pipe furnish all labor, materials, equipment and services to
provide light sewer cleaning, together with all associated and appurtenant
Work as specified or directed by the OWNER. The Work includes all sewer
flow bypassing and bypass pumping, removal and disposal of material,
transportation and disposal fees, traffic control and appurtenant Work, all
complete in accordance with the requirements in Section 02760 – Cleaning
of Sewers. CCTV inspection of sewers is not included under this Contract
item and will be paid under the Contract Items for Survey CCTV Inspection
of Sewer Pipe.
2. Measurement for Payment: The length of light sewer cleaning of 6- to 72-
inch diameter pipe to be measured under Contract Item 1 through 6 will be
the actual length of light sewer cleaning provided in the Work and accepted,
measured from the centerline of the manhole to the centerline of the
manhole along the centerline of the pipeline. The payment for light
cleaning of rectangular or irregular shaped pipes shall be based on the total
linear feet of pipeline cleaned and the size of the pipe with compensation
provided by a light cleaning unit price with an equivalent cross sectional
area. Light sewer cleaning which is rejected or withdrawn will not be
measured for payment.
3. Payment: Payment for the light sewer cleaning of 6- to 72-inch diameter
pipe will be made at the Contract unit price per linear foot of Contract Item
1 through 6. Each manhole to manhole reach shall be paid once by either
light cleaning or heavy sewer cleaning, not both.
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B. Contract Items 7 through 12 - Heavy Sewer Cleaning (Pipe Size of 6-inch to 72-
inch):
1. Description: Under the Contract Item for Heavy Sewer Cleaning of 6- to
72-inch diameter pipe furnish all labor, materials, equipment and services to
provide heavy sewer cleaning, together with all associated and appurtenant
Work as specified or directed by the OWNER. The Work includes all sewer
flow bypassing and bypass pumping, removal and disposal of material,
transportation and disposal fees, traffic control and appurtenant Work, all
complete in accordance with the requirements in Section 02760 – Cleaning
of Sewers. CCTV inspection of sewers is not included under this Contract
item and will be paid under the Contract Items for Survey CCTV Inspection
of Sewer Pipe.
2. Measurement for Payment: The length of heavy sewer cleaning of 6- to 72-
inch diameter pipe to be measured under Contract Item 7 through 12 will be
the actual length of heavy sewer cleaning provided in the Work and
accepted, measured from the centerline of the manhole to the centerline of
the manhole along the centerline of the pipeline. The payment for heavy
cleaning of rectangular or irregular shaped pipes shall be based on the total
linear feet of pipeline cleaned and the size of the pipe with compensation
provided by a heavy cleaning unit price with an equivalent cross sectional
area. Heavy sewer cleaning which is rejected or withdrawn will not be
measured for payment.
3. Payment: Payment for the heavy sewer cleaning of 6- to 72-inch diameter
pipe will be made at the Contract unit price per linear foot of Contract Item
7 through 12. Each manhole-to-manhole reach shall be paid once by either
light cleaning or heavy sewer cleaning, not both.
C. Contract Items 13 through 18 - Survey CCTV Inspection of Sewer Pipe (Pipe Size
of 6-inch to 72-inch):
1. Description: Under the Contract Item for closed-circuit television
inspection of 6- to 72-inch diameter pipe furnish all labor, materials,
equipment and services to provide closed-circuit television inspection,
together with all associated and appurtenant Work as specified or directed
by the OWNER. The Work includes all sewer flow bypassing and bypass
pumping, traffic control and appurtenant Work, all complete in accordance
with the requirements in Section 02651 – Television Inspection. The Work
may include raising paved over or buried manholes and replacing manhole
frames and covers for inspection which will be paid under the Contract
Items 45, 46 and 47 for manhole frame and cover replacement and manhole
risers, respectively.
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2. Measurement for Payment: The length of closed-circuit television
inspection of 6- to 72-inch diameter pipe to be measured under Contract
Item 13 through 18 will be the actual length of closed-circuit television
inspection provided in the Work and accepted, measured from the centerline
of the manhole to the centerline of the manhole along the centerline of the
pipeline. Closed-circuit television inspection that is rejected or withdrawn
will not be measured for payment. Payment will not be made for the
following:
a. Poor or unacceptable quality videos.
b. Re-televising any pipeline segment without prior approval of the
OWNER.
c. Portions of the pipeline through which the camera could not pass.
d. Inadequate pipeline flow control.
3. Payment: Payment for the closed-circuit television inspection of 6- to 72-
inch diameter pipe will be made at the Contract unit price per linear foot of
Contract Item 13 through 18. The payment for survey CCTV inspection of
rectangular or irregular shaped pipes shall be based on the total linear feet of
pipe inspected and the size of the pipe with compensation provided by a
survey CCTV inspection unit price with an equivalent cross sectional area.
D. Contract Item 19 - Survey CCTV Inspection of 3-inch to 8-inch Lateral Pipe:
1. Description: Under the Contract Item for closed-circuit television
inspection of 3- to 8-inch diameter pipe furnish all labor, materials,
equipment and services to provide closed-circuit television inspection using
lateral launch camera, together with all associated and appurtenant Work as
specified or directed by the OWNER. The Work includes all sewer flow
bypassing and bypass pumping, traffic control and appurtenant Work, all
complete in accordance with the requirements in Section 02651 –
Television Inspection. The Work may include raising paved over or buried
manholes and replacing manhole frames and covers for inspection which
will be paid under the Contract Items 56, 57 and 58 for manhole frame and
cover replacement and manhole risers, respectively.
2. Measurement for Payment: The length of closed-circuit television
inspection of 3- to 8-inch diameter lateral pipe to be measured under
Contract Item 19 will be the actual length of closed-circuit television
inspection provided in the Work and accepted, measured from the service
lateral connection at sewer main to the property line along the centerline of
the lateral pipeline. Closed-circuit television inspection that is rejected or
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withdrawn will not be measured for payment. Payment will not be made for
the following:
a. Poor or unacceptable quality videos.
b. Re-televising any pipeline segment without prior approval of the
OWNER.
c. Portions of the pipeline through which the camera could not pass.
d. Inadequate pipeline flow control.
3. Payment: Payment for the closed-circuit television inspection of 3- to 8-
inch diameter lateral pipe will be made at the Contract unit price per linear
foot of Contract Item 19. The payment for survey CCTV inspection of
rectangular or irregular shaped pipes shall be based on the total linear feet of
pipeline inspected and the size of the pipeline with compensation provided
by a survey CCTV inspection unit price with an equivalent cross sectional
area.
E. Contract Items 20 through 22 – Combination Vacuum/Jet Truck and Crew for
Collection System Work, Regular, Overtime, and Emergency Hours:
1. Description: Regular, Overtime, and Emergency Hours are defined in
accordance with the requirements in Section 01011 – Summary of Work.
Work ordered by the OWNER on an hourly basis to include all labor,
supervision, materials, equipment, insurance, taxes, traffic control, bypass
pumping, hoses and connectors, removal and disposal of material,
transportation and disposal fees, and services to provide a combination
vacuum/jet truck and crew, together with all associated and appurtenant
Work as specified or directed by the OWNER. The Work shall be in
accordance with the requirements in Section 02760 – Cleaning of Sewers.
2. Measurement for Payment: The hours of Combination Vacuum/Jet Truck
and Crew for Collection System Work to be measured under Contract Item
20 through 22 will be the actual hours of Jet Truck and Crew Work on site
performing the Work authorized by the OWNER. Travel time to the jobsite
will not be billable.
3. Payment: Payment for the Combination Vacuum/Jet Truck and Crew for
Collection System Work will be made at the Contract unit price per hour for
Contract Item 20 through 22.
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F. Contract Items 23 through 25 - CCTV Truck and Crew for Collection System
Work, Regular, Overtime, and Emergency Hours:
1. Description: Under the Contract Item for CCTV Truck and Crew for
Collection System Work, Regular, Overtime, and Emergency Hours,
Regular, Overtime, and Emergency Hours are defined in accordance with
the requirements in Section 01011 – Summary of Work. Work ordered by
the OWNER on an hourly basis to include all labor, supervision, materials,
equipment, insurance, taxes, traffic control, bypass pumping, hoses and
connectors, pipe removal and disposal of material, transportation and
disposal fees, and services to provide a CCTV truck and crew, together with
all associated and appurtenant Work as specified or directed by the
OWNER. The Work shall be in accordance with the requirements in
Section 02651 – Television Inspection.
2. Measurement for Payment: The hours of CCTV Truck and Crew for
Collection System Work to be measured under Contract Item 23 through 25
will be the actual hours of CCTV Truck and Crew are on site performing the
Work authorized by the OWNER. Travel time to the jobsite will not be
billable. Closed-circuit television inspection that is rejected or withdrawn
will not be measured for payment. Payment will not be made for the
following:
a. Poor or unacceptable quality videos.
b. Re-televising any pipeline segment without prior approval of the
OWNER.
c. Inadequate pipeline flow control.
3. Payment: Payment for the CCTV Truck and Crew for Collection System
Work will be made at the Contract unit price per hour of Contract Item 23
through 25.
G. Contract Item 26 – Clearing, Grubbing, and Site Restoration:
1. Description: Under the Contract Item for Clearing, Grubbing, and Site
Restoration for Access to Manholes ordered by the OWNER on a square
yard basis to include all labor, supervision, materials, equipment, insurance,
taxes, traffic control, pipe removal and disposal of material, transportation
and disposal fees, with all associated and appurtenant Work as specified or
directed by the OWNER. The Work shall be in accordance with the
requirements in Section 02110 – Clearing, Grubbing, and Site Restoration.
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2. Measurement: The quantity of clearing, grubbing and site restoration will
be the computed number of square yards placed in the limits as shown,
specified or ordered by the OWNER. No payment will be made for clearing
and grubbing carried beyond the grades specified or ordered. No payment
will be made for site restoration for damage from the CONTRACTOR’s
negligence.
3. Payment: The unit price per square yard for Contract Item 26 will be full
compensation for providing all labor, materials, equipment, tools, and
incidentals required to perform all clearing, grubbing and site restoration, as
shown, specified, ordered by the OWNER, and required to complete the
Work in every respect.
H. Contract Items 27 through 29 - Chemical Root Treatment, 3-inch through 36-inch
Sewer Pipe:
1. Description: Under the Contract Item for Chemical Root Treatment, 3-inch
through 36-inch Sewer Pipe furnish all labor, materials, equipment and
services to provide application of chemical root treatment, together with all
associated and appurtenant Work as specified or directed by the OWNER.
The Work includes all sewer flow bypassing and bypass pumping, removal
and disposal of material, transportation and disposal fees, traffic control and
appurtenant Work, all complete in accordance with the requirements in
Section 02760 – Cleaning of Sewers.
2. Measurement: The quantity of sewer treated with chemical root treatment
will be measured in linear feet from centerline of manhole to centerline of
manhole horizontally along the centerline of the treated pipes.
3. Payment: The payment for sewer pipes treated shall be based on the linear
feet of pipeline where chemical root treatment is used. The unit price per
linear foot for Contract Item 27 through 29 will be full compensation for
providing for all labor, traffic control, bypass pumping, materials,
equipment, tools and incidentals for sewer treated with chemical root
treatment of pipe sizes of 3 through 36 inches. The unit price per linear foot
shall also include a post TV inspection one year after application to verify
effectiveness, reconstruction of manholes or repair to manholes damaged by
the work.
I. Contract Items 30 through 32- Chemical Grease Treatment, 3-inch through 36-
inch Sewer Pipe:
1. Description: Under the Contract Item for Chemical Grease Treatment, 3-
inch through 36-inch Sewer Pipe furnish all labor, materials, equipment and
services to provide application of chemical grease treatment, together with
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all associated and appurtenant Work as specified or directed by the
OWNER. The Work includes all sewer flow bypassing and bypass
pumping, removal and disposal of material, transportation and disposal fees,
traffic control and appurtenant Work, all complete in accordance with the
requirements in Section 02760 – Cleaning of Sewers.
2. Measurement: The quantity of chemical grease treatment will be measured
in linear feet from centerline of manhole to centerline of manhole
horizontally along the centerline of the treated pipes.
3. Payment: The payment for sewer pipes treated shall be based on the linear
feet of pipeline where chemical grease treatment used. The unit price per
linear foot for Item 30 through 32 will be full compensation for providing
for all labor, traffic control, bypass pumping, materials, equipment, tools
and incidentals for chemical grease treatment for pipe sizes of 3 to 36
inches. The unit price per linear foot shall also include reconstruction of
manholes or repair to manholes damaged by the work.
J. Contract Items 33 and 34 – Manhole Inspection:
1. Description: Under the Contract Item for Manhole Inspection furnish all
labor, materials, equipment, and services to provide remote above-ground
inspection of manhole and connecting sewer pipes, together with all
associated and appurtenant Work as specified or directed by the OWNER.
The Work includes all sewer flow bypassing and bypass pumping, traffic
control and appurtenant Work, all complete in accordance with the
requirements in Section 02652 – Sewer Manhole Inspection. The Work may
include raising paved over or buried manholes and replacing manhole
frames and covers for inspection which will be paid under the Contract
Items 45, 46 and 47 for manhole frame and cover replacement and manhole
risers, respectively.
2. Measurement: Payment will be based on each manhole inspected.
3. Payment: The unit price per manhole for Item 33 and 34will be full
compensation for providing for all labor, traffic control, bypass pumping,
materials, equipment, tools, and incidentals for inspecting manholes. The
unit price shall also include reconstruction of manholes or repair to
manholes damaged by the work.
K. Contract Item 35 - Sewer Smoke Testing:
1. Description: Under the Contract Item for Sewer Smoke Testing, furnish all
labor, materials, equipment, supervision and services to provide sewer
smoke testing, together with all associated and appurtenant Work as
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specified or directed by the OWNER. The Work includes all sewer flow
bypassing and bypass pumping, traffic control, and appurtenant Work, all
complete in accordance with the requirements in Section 02653 – Sewer
Smoke Testing.
2. Measurement: The payment will be based on each manhole location where
smoke testing is performed.
3. Payment: The unit price per smoke testing location for Item 34 will be full
compensation for providing for all labor, traffic control, bypass pumping,
materials, equipment, tools and incidentals for sewer smoke testing. The
unit price shall also include reconstruction of manholes or repair to sewers
and manholes damaged by the work.
L. Contract Item 36 – Sewer Dyed-Water Testing:
1. Description: Under the Contract Item for Sewer Dyed-Water testing,
furnish all labor, materials, equipment and services to provide sewer dyed-
water testing, together with all associated and appurtenant Work as specified
or directed by the OWNER. The Work includes coordination with the
OWNER and other utilities, traffic control, and appurtenant Work, all
complete in accordance with the requirements in Section 02654 – Sewer
Dyed – Water Testing.
2. Measurement: Method of payment will be based on each dye introduction
location where dyed-water testing is performed.
3. Payment: The unit price per dyed-water testing location for Item 35 will be
full compensation for providing for all labor, traffic control, materials,
equipment, tools, and incidentals for sewer dyed-water testing. The unit
price shall also include repair of any sewer or manhole damages and public
or private property damages caused by testing.
M. Contract Items 37 through 42 – Flooded Sewer Dyed-Water Testing:
1. Description: Under the Contract Item for Flooded Sewer Dyed-Water
testing, furnish all labor, materials, equipment and services to provide
flooded sewer dyed-water testing, together with all associated and
appurtenant Work as specified or directed by the OWNER. The Work
includes coordination with the OWNER and other utilities, traffic control,
and appurtenant Work, all complete in accordance with the requirements in
Section 02654 – Sewer Dyed – Water Testing.
2. Measurement: Method of payment will be based on linear feet of the pipe
measured from the centerline of the manhole to the centerline of the
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manhole along the centerline of the pipes for which flooded dyed-water
testing is performed.
3. Payment: The unit price per flooded dyed-water testing location for Items
36 through 41 will be full compensation for providing for all labor, traffic
control, materials, equipment, tools, and incidentals for flooded sewer dyed-
water testing. The unit price shall also include repair of any sewer or
manhole damages caused by testing.
N. Contract Items 43 through 45 - VDOT Number 57, 21 and 3 Stone:
1. Description: Under the Contract Items for VDOT Number 57, 21 and 3
Stone, for Work ordered by the OWNER on a ton basis to include all labor,
supervision, materials, equipment, to provide but not limited to
transportation and delivery of material and equipment, spreading and
constructing of roads, including compaction, removal and disposal if
directed by the OWNER, together with all associated and appurtenant Work
as specified or directed by the OWNER.
2. Measurement: Measurement shall be made by ton.
3. Payment - Under this Item, furnish, transport, placement and compaction of
VDOT Number 57, 21 and 3 Stone which may be required as directed by the
OWNER, including disposal of road bed material and all labor and
equipment. Only material that has been ordered in writing and approved by
the OWNER will be paid for under this Item. Purchase weigh tickets must
be provided to OWNER.
O. Contract Items 46 and 47 - Manhole Frame and Cover Replacement:
1. Measurement: Method of payment will be determined on the actual number
of manhole frames and covers or gasketed covers removed and installed by
the CONTRACTOR.
2. Payment: The payment for manhole frames and covers shall be based on
the unit price per actual number of manhole frames and covers removed and
replaced. The unit price per actual number of frame and cover replacement
shall be based on full compensation for providing all labor, materials,
mobilization, equipment, tools, and incidentals for removing, replacing, and
disposing of existing manhole frames and covers, pickup and delivery to the
job site, adjusting the covers to meet existing grade including fill material,
installing a rubberized sealing system, repairing all damaged pavement, and
any other incidentals required to complete the work as specified in Section
02652 – Sewer Manhole Inspection.
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P. Contract Item 48 - Manhole Frame Risers:
1. Measurement: Method of payment will be determined based on the length
in inches of manhole frame risers installed.
2. Payment: The payment for manhole frame risers shall be based on the unit
price per inch of manhole frame risers installed. The unit price per inch of
manhole frame risers shall be based on full compensation for providing all
labor, materials, mobilization, equipment, tools, and incidentals for
installation of manhole risers, pickup and delivery to the jobsite, adjusting
the covers to meet existing grade including fill material, installing a
rubberized sealing system, repairing all damaged pavement, and any other
incidentals required to complete the work as specified in Section 02652 –
Sewer Manhole Inspection.
Q. Contract Items 49 - Allowance for Railroad Flagging Services:
1. Description: Under the Contract Item for Allowance for Railroad Flagging
Services, the Contractor shall pay the railroad companies for providing
flagging services as requested by these companies to perform the Work.
2. Measurement: Method of payment will be determined based on the lump
sum amount paid for railroad flagging services.
3. Payment: The payment for railroad flagging services will be based on the
CONTRACTOR’s documented payments to railroad companies for
providing flagging services during the Work. The CONTRACTOR shall
provide the receipt to the OWNER in order to receive reimbursement from
the OWNER plus 10% overhead costs to coordinate work with and
administer payments to the railroad companies.
R. Contract Items 50 - Allowance for Railroad Protective Insurance:
1. Description: Under the Contract Item for Allowance for Railroad Protective
Insurance, the CONTRACTOR shall pay for acquiring and maintaining the
railroad insurance in accordance with the terms and conditions of the
railroad company.
2. Measurement: Method of payment will be determined based on the lump
sum amount paid for insurance.
3. Payment: The payment for railroad protective insurance shall be based on
the lump sum amount paid for insurance. The CONTRACTOR shall provide
the receipt to the OWNER in order to receive reimbursement from the
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OWNER plus 10% overhead costs for acquiring and maintaining the
insurance.
S. Contract Items 51 through 53 – Laser Profiling with Survey CCTV Inspection of
Sewer Pipe (Pipe Size of 12-inch to 47-inch):
1. Description: Under the Contract Item for Laser Profiling with Survey
CCTV Inspection of 12- to 47-inch diameter pipe, furnish all labor,
materials, equipment and services to provide Laser Profiling, together with
CCTV Inspection and all associated and appurtenant Work as specified or
directed by the OWNER. The Work includes all sewer flow bypassing and
bypass pumping, traffic control and appurtenant Work, all complete in
accordance with the requirements in Section 02651 – Television Inspection
and Section 02655 – Sewer Laser Profiling.
2. Measurement for Payment: The length of laser profiling with closed-circuit
television inspection of 12- to 47-inch diameter pipe to be measured under
Contract Items 50 through 52 will be the actual length of laser profiling with
closed-circuit television inspection provided in the Work and accepted,
measured from the centerline of the manhole to the centerline of the
manhole along the centerline of the pipeline. The payment for laser profiling
with survey CCTV inspection of rectangular or irregular shaped pipes shall
be based on the total linear feet of pipe inspected and the size of the pipe
with compensation provided by a survey laser /CCTV inspection unit price
with an equivalent cross sectional area. Laser profiling with closed-circuit
television inspection that is rejected or withdrawn will not be measured for
payment. Payment will not be made for the following:
a. Poor or unacceptable quality videos and laser profiling reports.
b. Re-televising and/or laser profiling any pipeline segment without
prior approval of the OWNER.
c. Inadequate pipeline flow control.
T. Contract Items 54 and 55 – 3D Laser Scanning with Survey CCTV Inspection of
Sewer Pipe (Pipe Size of 48-inch to 72-inch):
1. Description: Under the Contract Item for 3D Laser Scanning with Survey
CCTV Inspection of 48- to 72-inch diameter pipe, furnish all labor,
materials, equipment and services to provide 3D Laser Scanning, together
with CCTV Inspection and all associated and appurtenant Work as specified
or directed by the OWNER. The Work includes all sewer flow bypassing
and bypass pumping, traffic control and appurtenant Work, all complete in
Sewer Inspection/Cleaning 01150-15 10/2017
accordance with the requirements in Section 02651 – Television Inspection
and Section 02655 – Sewer Laser Profiling.
2. Measurement for Payment: The length of laser scanning with closed-circuit
television inspection of 48- to 72-inch diameter pipe to be measured under
Contract Items 53 and 54 will be the actual length of laser scanning with
closed-circuit television inspection provided in the Work and accepted,
measured from the centerline of the manhole to the centerline of the
manhole along the centerline of the pipeline. The payment for laser
scanning with survey CCTV inspection of rectangular or irregular shaped
pipes shall be based on the total linear feet of pipe inspected and the size of
the pipe with compensation provided by a survey laser scanning /CCTV
inspection unit price with an equivalent cross sectional area. Laser scanning
with closed-circuit television inspection that is rejected or withdrawn will
not be measured for payment. Payment will not be made for the following:
a. Poor or unacceptable quality videos and laser scanning reports.
b. Re-televising and/or laser scanning any pipeline segment without
prior approval of the OWNER.
c. Inadequate pipeline flow control.
U. Contract Items 56 through 60 – Sonar Inspection of Sewer Pipe (Pipe Size of 12-
inch to 72-inch):
1. Description: Under the Contract Item for Sonar Inspection of 12- to 72-inch
diameter pipe, furnish all labor, materials, equipment and services to
provide Sonar Inspection, and all associated and appurtenant Work as
specified or directed by the OWNER. The Work includes traffic control and
appurtenant Work, all complete in accordance with the requirements in
Section 02656 – Sewer Sonar Inspection.
2. Measurement for Payment: The length of sonar inspection of 12- to 72-inch
diameter pipe to be measured under Contract Items 55 through 59 will be
the actual length of sonar inspection provided in the Work and accepted,
measured from the centerline of the manhole to the centerline of the
manhole along the centerline of the pipeline. The payment for sonar
inspection of rectangular or irregular shaped pipes shall be based on the
total linear feet of pipe inspected and the size of the pipe with compensation
provided by a sonar inspection unit price with an equivalent cross sectional
area. Sonar inspection that is rejected or withdrawn will not be measured for
payment. Payment will not be made for the following:
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a. Poor or unacceptable quality videos and sonar inspection reports.
b. Re-sonar inspecting any pipeline segment without prior approval of
the OWNER.
V. Contract Items 61 through 65 – Sonar Inspection with Survey CCTV Inspection of
Sewer Pipe (Pipe Size of 12-inch to 72-inch):
1. Description: Under the Contract Item for Sonar Inspection with Survey
CCTV Inspection of 12- to 72-inch diameter pipe, furnish all labor,
materials, equipment and services to provide Sonar Inspection, together with
CCTV Inspection and all associated and appurtenant Work as specified or
directed by the OWNER. The Work includes traffic control and appurtenant
Work, all complete in accordance with the requirements in Section 02656 –
Sewer Sonar Inspection and Section 02651 – Television Inspection.
2. Measurement for Payment: The length of sonar inspection with closed-
circuit television inspection of 12- to 72-inch diameter pipe to be measured
under Contract Items 60 through 64 will be the actual length of sonar
inspection with closed-circuit television inspection provided in the Work
and accepted, measured from the centerline of the manhole to the centerline
of the manhole along the centerline of the pipeline. The payment for sonar
inspection with survey CCTV inspection of rectangular or irregular shaped
pipes shall be based on the total linear feet of pipe inspected and the size of
the pipe with compensation provided by a survey sonar/CCTV inspection
unit price with an equivalent cross sectional area. Sonar inspection with
closed-circuit television inspection that is rejected or withdrawn will not be
measured for payment. Payment will not be made for the following:
a. Poor or unacceptable quality videos and sonar inspection reports.
b. Re-televising and/or sonar inspecting any pipeline segment without
prior approval of the OWNER.
W. Contract Items 66 through 71 - Trim Protruding Service Connections/Taps (Pipe
Size of 6-inch to 72-inch):
1. Measurement: Actual number of protruding service connections which
require trimming prior to completing survey closed-circuit television
inspection. Measurement will only apply to protruding service connections
which are associated with the work completed as part of the survey closed-
circuit television inspection.
2. Payment: The payment for trimming protruding service connections shall
be based on the unit price per trimming of a protruding connection. The
Sewer Inspection/Cleaning 01150-17 10/2017
unit price per trimming of a protruding connection for Contract Items 65
through 70 will be full compensation for providing for all labor, all sewer
flow bypassing and bypass pumping, traffic control, materials, equipment,
tools and incidentals as specified in Section 02760 – Cleaning of Sewers.
X. Contract Item 72 - Tree Removal Including Root Grubbing (Between 6 and 15
inches in Diameter):
1. Description: Under the Contract Item for Tree Removal Including Root
Grubbing (Between 6 and 15 inches in Diameter) ordered by the OWNER
on an each basis to includes all labor, supervision, materials, equipment,
insurance, taxes, traffic control, removal and disposal of material,
transportation and disposal fees, with all associated and appurtenant Work
as specified or directed by the OWNER. The Work shall be in accordance
with the requirements in Section 02110 – Clearing, Grubbing, and Site
Restoration.
2. Measurement: The quantity of tree removal will be the computed number
of trees, between 6 and 15 inches in diameter, removed, as shown, specified
or ordered by the OWNER. No payment will be made for trees not
specified for removal.
3. Payment: The unit price per tree removed for Contract Item 71 will be full
compensation for providing all labor, materials, equipment, tools, and
incidentals required to perform all tree removal and root grubbing, as
shown, specified, or ordered by the OWNER.
Y. Contract Item 73 - Tree Removal Including Root Grubbing (Greater than 15
inches in Diameter):
1. Description: Under the Contract Item for Tree Removal Including Root
Grubbing (Greater than 15 inches in Diameter) ordered by the OWNER on
an each basis to include all labor, supervision, materials, equipment,
insurance, taxes, traffic control, removal and disposal of material,
transportation and disposal fees, with all associated and appurtenant Work
as specified or directed by the OWNER. The Work shall be in accordance
with the requirements in Section 02110 – Clearing, Grubbing, and Site
Restoration.
2. Measurement: The quantity of tree removal will be the computed number
of trees, greater than 15 inches in diameter, removed as shown, specified or
ordered by the OWNER. No payment will be made for trees not specified
for removal.
Sewer Inspection/Cleaning 01150-18 10/2017
3. Payment: The unit price per tree removed for Contract Item 72 will be full
compensation for providing all labor, materials, equipment, tools, and
incidentals required to perform all tree removal and root grubbing, as
shown, specified, or ordered by the OWNER.
Z. Contract Item 74 – Vacuum Excavation:
1. Description: Under the Contract Item for Vacuum Excavation ordered by
the OWNER, furnish all labor, supervision, materials and equipment
together with all associated and appurtenant Work as specified or directed
by the OWNER. The Work includes mobilization, demobilization, all
excavating, backfilling, compaction of backfill, grading, traffic control
(including flagman, cones, barricades, arrow boards etc.), site restoration,
cleanup and appurtenant. The Work shall be in accordance with the
requirements in Section 02220 – Excavation and Backfill.
2. Measurement: The quantity of vacuum excavation to be measured for
payment under Contract Item 74 will be the number of vacuum excavations
performed, in the work and accepted by the OWNER.
3. Payment: Payment vacuum excavation for Contract Item 74 will be made at
the Contract unit price per each vacuum excavation.
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Sewer Inspection/Cleaning 01300-1 10/2017
SECTION 01300
SUBMITTALS
PART 1 GENERAL
1.1 SUBMITTAL PROCEDURES
A. Scheduling and Handling
1. Schedule submittals well in advance of the need for the material or
equipment. Allow time to make delivery of material or equipment after
submittal is approved.
2. Develop a submittal schedule that allows sufficient time for initial review,
correction, resubmission and final review of all submittals. The OWNER
will review and return submittals to the CONTRACTOR as expeditiously as
possible but the amount of time required for review will vary depending on
the complexity and quantity of data submitted. In no case will a submittal
schedule be acceptable which allows less than 30 days for initial review by
the OWNER. This time for review shall in no way be justification for
delays or additional compensation to the CONTRACTOR.
3. The OWNER’s review of submittals covers only general conformity to the
Specifications that affect the layout. Be responsible for quantity
determination. Be responsible for any errors, omissions or deviations from
the Contract requirements; review of submittals in no way relieves the
CONTRACTOR from his obligation to furnish required items according to
the Specifications.
4. Review submittals made by suppliers and Subcontractors before
transmitting them to the OWNER to assure proper coordination of the Work
and to determine that each submittal contains sufficient information about
materials and equipment for the OWNER to determine compliance with the
Contract Documents.
5. Submit five copies of documents unless otherwise specified in the following
paragraphs or in the Specifications.
6. Revise and resubmit submittals as required. Identify all changes made since
previous submittal.
7. Assume the risk for material or equipment that is fabricated or delivered
prior to approval. No material or equipment shall be incorporated into the
Sewer Inspection/Cleaning 01300-2 10/2017
Work or included in periodic progress payments until approval has been
obtained in the specified manner.
B. Transmittal Form and Numbering
1. Transmit each submittal to the OWNER with a Transmittal Form. See
sample in Exhibit B. Sequentially number each transmittal from beginning
with the number 1. Resubmittals shall use the original number with an
alphabetic suffix (i.e., 2A for first resubmittal of Submittal 2 or 15C for
third resubmittal of Submittal 15). Each submittal shall only contain one
type of work, material, or equipment. Mixed submittals will not be
accepted.
2. Identify variations from requirements of Contract Documents and identify
product or system limitations.
3. Transmittal forms for CCTV videos shall be numbered sequentially
beginning with T01, T02, T03, etc.
C. CONTRACTOR's Stamp
1. Apply CONTRACTOR's stamp, certifying that the items have been
reviewed in detail and are correct and in accordance with Contract
Documents, except as noted by any requested variance.
2. All submittals shall contain CONTRACTOR’s stamp and signature.
3. As a minimum, include the following in the CONTRACTOR’s stamp:
a. CONTRACTOR's name
b. Job number
c. Submittal number
d. Certification statement that the CONTRACTOR has reviewed the
submittal and it is in compliance with the Contract Documents
e. Signature line for CONTRACTOR
1.2 PRODUCT DATA
A. Submit product data for review as required in Specification sections contained in
the Contract Documents.
B. Mark each copy to identify applicable products, models, and options to be used in
this Project. Supplement manufacturers' standard data to provide information
unique to this Project, where required by the Specifications.
Sewer Inspection/Cleaning 01300-3 10/2017
C. For products specified only by reference standard, give manufacturers, trade name,
model or catalog designation and applicable reference standard.
1.3 SAMPLES
A. Submit the number of samples specified in Specifications, one of which will be
retained by the OWNER.
B. Reviewed samples which may be used in the Work are identified in Specifications.
C. Samples for Tests
1. Furnish such Samples of material as may be required for examination and
test. All Samples of materials for tests shall be taken according to standard
methods and as required by the Contract Documents.
1.4 MANUFACTURER'S CERTIFICATES
A. When specified in Specification sections, submit manufacturers' certificate of
compliance for review by OWNER.
B. Place CONTRACTOR's stamp, as described in paragraph 1.1, on front page of the
certification.
C. Submit supporting reference data, affidavits, and certifications as appropriate.
D. Certificates may be recent or previous test results on material or product, but must
be acceptable to OWNER.
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Sewer Inspection/Cleaning 01300-4 10/2017
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Sewer Inspection/Cleaning 01325-1 10/2017
SECTION 01325
PROGRESS SCHEDULE
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Form of Schedules
B. Work Days
C. Content of Schedules: Submit for approval a preliminary progress schedule for
each assignment.
D. Schedule Revisions
E. Submittal Requirements
1.2 FORM OF SCHEDULES
A. Prepare schedules in form of a horizontal bar chart.
1. Break the work into activities with durations of 1 to 10 days each, except for
nonconstruction activities, such as procurement of materials and delivery of
equipment, and other activities that may require longer durations. Group
activities related to a specific assignment for ease of understanding and
simplification. The OWNER will review the selection and number of
activities.
2. Utilize a horizontal time scale and identify first workday of each week.
3. Utilize scale and spacings to allow space for notations and future revisions.
B. Utilize a listing format that chronologically indicates the order of start of each item
of work.
1.3 WORK DAYS
A. Work Days and Holidays: The OWNER observes a five-day work week and the
following holidays: New Year's Day; Martin Luther King's Birthday; President’s
Day; Easter Monday; Memorial Day; Independence Day; Labor Day; Veterans
Day; Thanksgiving Day; the Friday after Thanksgiving; Christmas Eve and
Christmas Day. Work will not be permitted on these holidays unless otherwise
authorized by the OWNER.
Sewer Inspection/Cleaning 01325-2 10/2017
1.4 CONTENT OF SCHEDULES
A. Completion Dates: Show the beginning and ending dates stated in assignment
letter. Schedules showing completion prior to the assignment completion date will
be accepted but in no event will they be considered basis for a claim for delay
against the OWNER for the period between the early completion date and the
completion date provided in the Contract Documents.
B. Show complete sequence of Work by activity.
C. Show dates for beginning and completion of each major element of the Work.
Elements shall include, but not be limited to, the following:
1. Shop drawing receipt from supplier/manufacturer submitted to OWNER,
review and return to supplier/manufacturer
2. Material and equipment order, manufacturer, delivery, installation, and
checkouts
3. Performance tests and supervisory services activity
4. Construction of various facilities
5. Demolition
6. Grading, seeding, and sodding
7. Final cleanup
8. Allowance for inclement weather
9. Coordination with concurrent Work on site
D. Show projected percentage of completion for each item as of first day of each
month.
1.5 SCHEDULE REVISIONS
A. At a minimum, revise construction schedule every 14 calendar days to reflect
changes in progress of Work for duration of Contract.
B. Indicate progress of each activity at date of submittal.
C. Show changes occurring since previous submittal of schedule.
1. Major change in scope.
2. Activities modified since previous submittal.
Sewer Inspection/Cleaning 01325-3 10/2017
3. Revised projections of progress and completion.
4. Other identifiable changes.
D. Provide a written report as needed to define:
1. Problem areas, anticipated delays, and impact on schedule.
2. Corrective action recommended and its effect.
3. Effect of changes on schedules of other Contractors.
E. Provide a detailed two-week look ahead schedule to include at a minimum:
1. Specific activities and locations where work will take place each day.
2. Identify dates and times where work outside of normal hours may be
necessary.
3. Indicate when required notifications will be completed for any service
interruptions.
1.6 SUBMITTAL REQUIREMENTS
A. Schedule: Submit final progress schedule in accordance with paragraph 5.9 of the
General Conditions.
B. For preliminary and final submittal of project progress schedule and subsequent
revisions thereof, furnish three copies to OWNER.
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Sewer Inspection/Cleaning 01325-4 10/2017
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Sewer Inspection/Cleaning 01411-1 10/2017
SECTION 01411
TESTING LABORATORY SERVICES FURNISHED BY CONTRACTOR
PART 1 GENERAL
1.1 DESCRIPTION
A. CONTRACTOR shall employ and pay for an independent testing laboratory to
perform the specified services. Laboratory selected shall be subject to approval by
the OWNER.
B. The testing laboratory is not authorized to approve or accept any portion of the
Work; rescind, alter or augment the requirements of the Contract Documents; or
perform any duties of the CONTRACTOR.
1.2 QUALIFICATIONS OF LABORATORY
A. Where applicable, meet "Recommended Requirements for Independent Laboratory
Qualification," latest edition, published by American Council of Independent
Laboratories and the basic requirements of ASTM E 329, "Standards of
Recommended Practice for Inspection and Testing Agencies for Concrete and
Steel as Used in Construction." Laboratory shall be authorized to operate in the
state in which Project is located.
B. If requested by OWNER, submit copy of report of inspection of facilities made by
Materials Reference Laboratory of National Bureau of Standards during most
recent tour of inspection; with memorandum of remedies of any deficiencies
reported by inspection.
C. Testing Equipment:
1. Calibrated at maximum 12-month intervals by devices of accuracy traceable
to either National Bureau of Standards or accepted values of natural
physical constants.
2. If requested by OWNER, submit copy of certificate of calibration, made by
accredited calibration agency.
1.3 LABORATORY DUTIES
A. Cooperate with the OWNER and CONTRACTOR, and provide qualified
personnel promptly on notice.
Sewer Inspection/Cleaning 01411-2 10/2017
B. Perform specified inspections, sampling and testing of materials and methods of
construction; comply with applicable standards; ascertain compliance with
requirements of Contract Documents.
C. Promptly notify the OWNER and CONTRACTOR, of irregularities or deficiencies
of Work, which are observed during performance of services.
D. Promptly submit three copies of reports of inspections and tests to OWNER,
including:
1. Date issued.
2. Project title and number.
3. Testing laboratory name and address.
4. Name and signature of inspector.
5. Date of inspection or sampling.
6. Record of temperature and weather.
7. Date of test.
8. Identification of product and Specification Section.
9. Location in Project.
10. Type of inspection or test.
11. Results of tests and observations regarding compliance with Contract
Documents.
E. Perform additional tests and services as required to assure compliance with the
Contract Documents.
1.4 CONTRACTOR'S COORDINATION WITH LABORATORY
A. Cooperate with laboratory personnel; provide access to Work and to
manufacturer's operations.
B. Provide to laboratory, representative samples of materials to be tested, in required
quantities.
C. Furnish labor and facilities:
Sewer Inspection/Cleaning 01411-3 10/2017
1. To provide access to Work to be tested.
2. To obtain and handle samples at the site.
3. To facilitate inspections and tests.
4. For laboratory's exclusive use for storage and curing of test samples.
5. Forms for preparing concrete test beams and cylinders.
D. Notify laboratory and the OWNER sufficiently in advance of operations to allow
for assignment of personnel and scheduling of tests.
E. Arrange with laboratory and pay for, additional samples and tests required for
CONTRACTOR'S convenience.
1.5 PRODUCT TEST REPORTS
A. Furnish copies of product test reports where required by the Specifications or
requested by OWNER.
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Sewer Inspection/Cleaning 01500-1 10/2017
SECTION 01500
TEMPORARY FACILITIES AND CONTROLS
PART 1 GENERAL
1.1 CONTRACTOR’S RESPONSIBILITY
A. The facilities and controls specified in this section are considered minimum for the
Project. Provide additional facilities and controls for the proper execution of the
Work and to meet responsibilities for protection of persons and property.
1. Comply with applicable requirements specified in other sections of the
Specifications.
2. Maintain and operate temporary facilities and systems to assure continuous
service.
3. Modify and extend systems as Work progress requires.
4. Completely remove temporary materials and equipment when their use is no
longer required.
5. Restore existing facilities used for temporary services to specify or to
original condition.
1.2 SAFETY REQUIREMENTS
A. Conduct operations in strict accord with applicable Federal, State and local safety
codes and statutes and with good construction practice. Be responsible and
obligated to establish and maintain procedures for safety of all work, personnel
and equipment involved in the Project.
B. Observance of and compliance with the regulations shall be solely and without
qualification the responsibility of the CONTRACTOR without reliance or
superintendence of or direction by the OWNER’s representative. Immediately
advise the OWNER of investigation or inspection by Federal Safety and Health
inspectors of the CONTRACTOR or Subcontractor's work or place of work on the
job site under this Contract, and after such investigation or inspection, advise the
OWNER of the results. Submit one copy of accident reports to the OWNER
within 10 days of occurrence.
Protect areas occupied by workmen using the best available devices for detection
of lethal and combustible gases. Test such devices frequently to assure their
Sewer Inspection/Cleaning 01500-2 10/2017
functional capability. Constantly observe infiltration of liquids into the Work area
for visual or odor evidences of contamination, immediately take appropriate steps
to seal off entry of contaminated liquids to the Work area.
Provide safety measures, including but not limited to safety personnel, first-aid
equipment, ventilating equipment, and safety equipment.
Maintain required coordination with the City's Police and Fire Departments during
the entire period covered by the Contract.
1.3 FIRST AID EQUIPMENT
A. Provide a first aid kit throughout the Work period. List telephone numbers for
physicians, hospitals, and ambulance services in each first aid kit.
B. Have at least one person thoroughly trained in first aid procedures present on the
site whenever Work is in progress.
1.4 SECURITY MEASURES
A. Protect all Work materials, equipment, and property from loss, theft, damage, and
vandalism. Protect property includes OWNER’s property used in connection with
the performance of the Contract.
B. If existing fencing or barriers are breached or removed for purposes of the work,
provide and maintain temporary security fencing equal to existing.
1.5 PROTECTION OF PUBLIC UTILITIES
Prevent damage to existing public utilities during the work. The location of
existing sewer, water or gas lines, conduits, underground cables or other structures
across or along the line of the proposed work may vary from the locations shown
on drawings provided by the OWNER and, where shown, the locations depth and
dimensions of such structures are approximately correct and may vary. Use extra
care when working in the areas where existing lines have been designated, and
will be solely liable for repair in the event of damage. Give owners of these
utilities at least 48 hours notice before commencing Work in the area, for locating
the utilities during construction, and for making adjustments or relocation of the
utilities when they conflict with the proposed Work.
Notify and coordinate with Miss Utility of Central Virginia (1-800-552-7001)
prior to beginning the work.
Sewer Inspection/Cleaning 01500-3 10/2017
1.6 PROTECTION OF THE WORK AND PROPERTY
A. Preventive Actions.
1. Take precautions, provide programs, and take actions necessary to protect
the Work and public and private property from damage.
2. Take action to prevent damage, injury or loss, including, but not limited to,
the following:
a. Store apparatus, materials, supplies, and equipment in an orderly, safe
manner that will not unduly interfere with progress of the Work or the
Work of any other Contractor, any utility service company, or the
OWNER’s operations.
b. Provide suitable storage for materials, which are subject to damage by
exposure to weather, theft, breakage, or otherwise.
c. Place upon the Work or any part thereof only such loads as are
consistent with the safety of that portion of the Work.
3. Frequently clean up refuse, rubbish, scrap materials, and debris caused by
the work operations, keeping the Project site safe and orderly.
4. Provide safe barricades and guard rails around openings, for scaffolding, for
temporary stairs and ramps, around excavations, elevated walkways, and
other hazardous areas.
5. Obtain written consent from proper parties before entering or occupying
with workers, tools, materials or equipment, privately-owned land except on
easements provided for the work.
6. Assume full responsibility for the preservation of public and private
property on or adjacent to the site. If any direct or indirect damage is done
by or on account of any act, omission, neglect, or misconduct in execution
of the Work, restore to a condition equal to or better than that existing
before the damage was done.
B. Barricades and Warning Signals
1. Where Work is performed on or adjacent to any roadway, right-of-way, or
public place, furnish and erect barricades, fences, lights, warning signs, and
danger signals; and take other precautionary measures for the protection of
persons or property and protection of the Work. Use barricades painted to
be visible at night. From sunset to sunrise, furnish and maintain at least one
Sewer Inspection/Cleaning 01500-4 10/2017
light at each barricade. Erect sufficient barricades to keep vehicles from
being driven on or into work site. Maintain barricades, signs, and lights until
the Project is accepted by the OWNER.
2. Provide a watchman at all places where the work causes obstructions to
normal traffic, excavation sites, or constitutes in any way a hazard to the
public.
3. Statutory Requirements: Install and maintain all barricades, signs, lights,
and other protective devices within highway rights- of- way in strict
conformity with City traffic control requirements.
C. Tree and Plant Protection
1. When working in a street or adjacent to private property where there are
trees, shrubs or vegetation, take every precaution to protect and prevent
unnecessary damage to the trees, shrubs, or vegetation. This shall include,
but is not limited to, boarding or wrapping of trunks or tying back of limbs.
In the course of the Work, should it become necessary to cut roots or limbs,
the cuts shall immediately be painted with a paint approved by the OWNER.
2. Leave lawn areas in as good condition as before the start of the work.
Restore areas where sod has been removed, by seeding or sodding.
D. Protection of Existing Structures
1. Underground Structures:
a. Underground structures are defined to include, but not be limited to,
sewer, water, gas, and other piping, and manholes, chambers,
electrical and signal conduits, tunnels, and other existing subsurface
installations located within or adjacent to the limits of the Work.
b. Drawings provided by the OWNER contain data relative to existing
public utility installations and structures above and below the ground
surface. Existing public utility installations and structures are
indicated on provided drawings only to the extent such information
was made available to, or found by, the OWNER in preparing the
drawings. These data are not guaranteed for completeness or
accuracy. Make necessary investigations to become fully informed as
to the character, condition, and extent of all public utility installations
and structures that may be encountered and that may affect the
construction operations.
Sewer Inspection/Cleaning 01500-5 10/2017
c. Necessary changes in location of the Work may be made by the
OWNER to avoid unanticipated underground structures.
2. Surface Structures:
a. Surface structures are defined as existing buildings, structures and
other constructed installations above the ground surface. Included
with such structures are their foundations or any extension below the
surface. Surface structures include, but are not limited to buildings,
tanks, walls, bridges, roads, dams, channels, open drainage, piping,
poles, wires, posts, signs, markers, curbs, walks, guard cables,
fencing, and other facilities that are visible above the ground surface.
b. Assume and accept responsibility for all injuries or damage to
culverts, building foundations and walls, retaining walls, or other
structures of any kind met with during the prosecution of the work.
Assume and accept liability for damages to public or private property
resulting therefrom.
3. Protection of Underground and Surface Structures:
a. Support in place and protect from direct or indirect injury to
underground and surface structures located within or adjacent to the
limits of the Work. Install such supports carefully and as required by
the party owning or controlling such structure. Before installing
structure supports, provide documentation to satisfy the OWNER that
the methods and procedures to be used have been approved by the
owner of the structure.
b. Avoid moving or in any way changing the property of public utilities
or private service corporations without prior written consent of a
responsible official of that service or public utility. Representatives
of these utilities reserve the right to enter within the limits of this
project for the purpose of maintaining their properties, or of making
such changes or repairs to their property that may be considered
necessary by performance of this Contract.
c. Assume risks attending the presence or proximity of underground and
surface structures within or adjacent to the limits to the Work
including but not limited to damage and expense for direct or indirect
injury caused by his Work to any structure. Immediately repair
damage caused, to the satisfaction of the owner of the damaged
structure.
Sewer Inspection/Cleaning 01500-6 10/2017
4. Work on Private Property
a. Make all necessary arrangements, at no additional cost to the
OWNER, for temporary use of private properties. Indemnify and
hold harmless the OWNER against claims or demands arising from
such use of properties outside of rights-of-way.
E. Protection of Installed Products.
1. Provide protection of installed products to prevent damage from subsequent
operations. Remove protection facilities when no longer needed, prior to
completion of Work.
2. Control traffic to prevent damage to equipment, materials, and surfaces.
1.7 TEMPORARY CONTROLS
A. During the Work:
1. Keep the site of the Work and adjacent premises free of materials, debris,
and rubbish. Remove this material from any portion of the site if such
material, debris, or rubbish constitutes a nuisance or is objectionable.
2. Remove from the site all surplus materials and temporary structures when
they are no longer needed.
3. Properly store volatile wastes in covered metal containers and remove from
the site daily.
4. Do not bury or burn on the site or dispose of into storm drains, sanitary
sewers, streams, or waterways, any waste material. Remove all wastes from
the site and dispose of in a manner complying with applicable ordinances
and laws.
1.8 ENVIRONMENTAL CONTROLS
A. Provide and maintain methods, equipment, and temporary work as necessary for
controls over environmental conditions at the work site and adjacent areas.
B. Comply with statutes, regulations, and ordinances that relate to the proposed Work
for the prevention of environmental pollution and preservation of natural
resources.
C. The OWNER recognizes that the site has considerable natural value and that
projects should have minimum impact to the surrounding environment. Adopt
Sewer Inspection/Cleaning 01500-7 10/2017
work procedures that do not cause unnecessary indiscriminate destruction of
vegetation, air or stream pollution, nor the harassment or destruction of wildlife.
D. Recognize and adhere to the environmental requirements of the Project. Disturbed
areas shall be strictly limited to boundaries established by the OWNER.
Particularly avoid pollution of "on-site" streams, sewers, wells, or other water
sources.
E. Burning of rubbish, debris or waste materials is not permitted.
F. Provide lime for sewage spill as soon as possible. Pelletized lime to be used in
areas where wastewater is flowing. Hydrated lime to be used in areas of stagnant
wastewater spills.
1.9 POLLUTION CONTROL
A. Provide methods, means, and facilities required to prevent contamination of soil,
water or atmosphere by discharge of noxious substances from the work operations.
B. Provide equipment and personnel to perform emergency measures required to
contain any spillage, and to remove contaminated soils or liquids.
C. Take special measures to prevent harmful substances from entering public waters.
Prevent disposal of wastes, effluents, chemicals, or other such substances adjacent
to streams, or in sanitary or storm sewers.
D. Provide systems for control of atmospheric pollutants.
1. Prevent toxic concentrations of chemicals.
2. Prevent harmful dispersal of pollutants into the atmosphere.
E. Use equipment during the work that conforms to current Federal, State, and local
laws and regulations.
1.10 NOISE CONTROL
A. Provide vehicles, equipment, and construction activities that minimize noise to the
greatest degree practicable. Noise levels shall conform to the latest OSHA
standards and City Ordinances and in no case will noise levels be permitted which
interfere with the Work of the OWNER or create a nuisance in the surrounding
residential neighborhoods.
B. Conduct the work operations during daylight hours except as approved by
OWNER.
Sewer Inspection/Cleaning 01500-8 10/2017
C. Select project equipment to operate with minimum noise and vibration. If in the
opinion of the OWNER, objectionable noise or vibration is produced by
equipment, rectify such conditions without additional cost to the OWNER. The
Sound Power Level (PWL) of any equipment shall not exceed 85 dbA (re: 10-12
watts) measured 5 feet from the piece of equipment, or the levels prescribed by
City Ordinances, whichever is lower. Explicit equipment noise requirements are
specified with equipment specifications.
1.11 DUST CONTROL
A. Control objectionable dust caused by operation of vehicles and equipment. Apply
water or use other methods, subject to approval of the OWNER, which will control
the amount of dust generated.
1.12 TEMPORARY DRAINAGE PROVISIONS
A. Provide for the drainage of stormwater and any water applied or discharged on the
site in performance of the Work. Provide adequate drainage facilities to prevent
damage to the Work, the site, and adjacent property.
B. Supplement existing drainage channels and conduits as necessary to carry all
increased runoff from the work operations. Construct dikes as necessary to divert
increased runoff from entering adjacent property (except in natural channels), to
protect the OWNER's facilities and the Work, and to direct water to drainage
channels or conduits. Provide ponding as necessary to prevent downstream
flooding.
1.13 WATER RUNOFF AND EROSION CONTROL
A. Where required, comply with the National Pollutant Discharge Elimination system
(NPDES) permit as stated in the Federal Register, Vol.57, No. 175.
B. In addition to the NPDES requirements, conform to the requirements in Section
02010 – Erosion and Sediment Control.
PART 2 PRODUCTS
Not Used
PART 3 EXECUTION
Not Used
END OF SECTION
Sewer Inspection/Cleaning 01564-1 10/2017
SECTION 01564
WASTE MATERIAL DISPOSAL
PART 1 GENERAL
1.1 SUBMITTALS
A. Submittals shall conform to requirements of Section 01300 – Submittals.
B. Obtain and submit disposal permits for proposed disposal sites if required by
federal, state, and local ordinances.
PART 2 PRODUCTS
Not Used
PART 3 EXECUTION
3.1 EXCESS MATERIAL
A. Vegetation, rubble, broken concrete, debris, asphaltic concrete pavement, excess
soil, and other materials not designated for salvage, become the property of
CONTRACTOR. Remove from the job site and legally dispose excess material.
B. Remove waste materials from the site on a daily basis, such that the site is
maintained in a neat and orderly condition.
C. Remove and dispose of waste and debris cleaned from the sewer system in
accordance with Specification Section 02760 – Cleaning of Sewers.
END OF SECTION
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Sewer Inspection/Cleaning 01611-1 10/2017
SECTION 01611
STORAGE OF MATERIALS
PART 1 GENERAL
1.1 DESCRIPTION
A. Store and protect materials in accordance with manufacturer's recommendations
and requirements of Specifications.
B. Make all arrangements and provisions necessary for the storage of materials and
equipment. All materials and equipment to be incorporated into the Work shall be
placed so as not to injure any part of the Work or existing facilities and so that free
access can be available at all times to all parts of the Work and to all public utility
installations in the vicinity of the Work. Materials and equipment shall be kept
neatly and compactly stored in locations that will cause a minimum of
inconvenience to other CONTRACTORS, public travel, adjoining owners, tenants
and occupants. Arrange storage in a manner to provide easy access for inspection.
Be responsible for any theft of stored materials.
C. Areas available on the construction site for storage of material and equipment shall
be approved by the OWNER.
D. Lawns, grass plots or private property shall not be used for storage purposes
without written permission of the OWNER or other person in possession or control
of such premises.
E. Be fully responsible for loss or damage to stored materials and equipment.
F. Do not open manufacturer’s containers until time of installation unless
recommended by the manufacturer or otherwise specified.
G. Products exposed to the elements are not adversely affected.
PART 2 PRODUCTS
Not Used
PART 3 EXECUTION
Not Used
END OF SECTION
Sewer Inspection/Cleaning 01611-2 10/2017
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Sewer Inspection/Cleaning 02010-1 10/2017
SECTION 02010
EROSION AND SEDIMENT CONTROL
PART 1 GENERAL
1.1 DESCRIPTION
A. Scope: Furnish, construct, maintain and replace all erosion and sediment control
features specified, shown, and required by the City, the local sediment control
inspectors, any other regulatory agency which has control or jurisdiction over
erosion and sedimentation control in the area in which the project is located and
Virginia Soil and Water Conservation Commission in the Virginia Erosion and
Sediment Control Handbook. Obtain all erosion and sediment control permits
required prior to any land disturbing operations.
B. Related Work Specified Elsewhere:
1. Section 02110 - Clearing, Grubbing and Site Restoration.
1.2 QUALITY ASSURANCE
A. Reference Codes and Standards: Reference the latest edition of the code or
standard at the time of project advertisement or assignment. Comply with
applicable provisions and recommendations of the following, except as otherwise
shown or specified:
1. Virginia Erosion and Sediment Control Handbook, Latest Edition.
2. Virginia Erosion and Sediment Control Regulations.
3. Virginia Erosion and Sediment Control Law.
4. Virginia Storm Water Management Regulations.
1.3 SUBMITTALS
A. Shop Drawings:
1. Submit Erosion and Sediment Control plan showing details of erosion and
sediment control devices and locations. Comply with requirements of
regulatory agency which has jurisdiction over erosion and sediment control
in the area in which the project is located. Submit technical data,
manufacturer’s literature and catalog information for the products specified.
2. Submit copies of approved Erosion and Sediment Control permits from
appropriate governing jurisdictions.
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PART 2 PRODUCTS
2.1 GENERAL
A. Temporary Silt Fence: Furnish silt fencing as specified in the plans and the
"Virginia Erosion and Sediment Control Handbook" Standard and Specification
3.05.
B. Temporary Sediment Trap: Furnish temporary sediment trap outlets as specified
in the "Virginia Erosion and Sediment Control Handbook" Standard and
Specification 3.13.
C. Temporary Diversion Dike: Provide temporary diversion dikes as specified in the
"Virginia Erosion and Sediment Control Handbook" Standard and Specification
3.09.
D. Temporary Gravel Construction Entrance: Furnish temporary gravel construction
entrances in accordance with the "Virginia Erosion and Sediment Control
Handbook" Standard and Specification 3.02.
E. Temporary Tree Protection: Provide fencing as specified in the "Virginia Erosion
and Sediment Control Handbook" Standard and Specification 3.38, Section 8.
F. Temporary Storm Drain Inlet Protection: Furnish storm drain inlet protection in
accordance with the "Virginia Erosion and Sediment Control Handbook" Standard
and Specification 3.07.
G. Permanent Level Rip Rap Aprons: Furnish rip rap as specified in the "Virginia
Erosion and Sediment Control Handbook," Standard and Specification 3.18.
PART 3 INSTALLATION AND MAINTENANCE
3.1 TEMPORARY PRACTICES
A. Install silt fencing, diversion dikes, yard inlet protection, temporary sediment
traps, and temporary construction entrances as shown and specified in the
"Virginia Erosion and Sediment Control Handbook."
3.2 INSTALLATION AND MAINTENANCE SEQUENCING
A. Construct erosion and sediment control practices and measures prior to any land
disturbing activity. Maintain practices in accordance with the "Virginia Erosion
and Sediment Control Handbook" and local ordinances. Remove only upon
completion of all land disturbing activities.
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B. Temporarily seed all disturbed areas including but not restricted to stock piles,
dams, banks of sediment basins and temporary road banks left unprotected for
more than 30 days at no cost to the OWNER. Protect all disturbed areas to control
erosion and prevent sedimentation of adjacent properties, storm sewers and/or
streams.
C. Use sediment control devices such as diversion berms, sediment raps, filter berms,
vegetation stabilization, etc., to prevent off-site sedimentation at all times.
D. Stockpile all borrow and/or spoil materials only within the limits of the permitted
site.
E. Protect all points of ingress and egress to prevent tracking of mud on the public
streets.
F. Divert storm drainage pipe discharges to temporary sediment traps. Construct rip
rap aprons during sediment trap removal.
G. Upon completion of all Work activities, and upon stabilizing all areas disturbed by
Work activities, remove remaining temporary sediment control devices. Install silt
fencing downhill of sediment traps prior to their removal. Restore sediment trap
areas to pre-existing grades and stabilized prior to removing silt fencing.
H. Upon removal of temporary erosion and sediment control features, inspect the
Work site for remaining disturbed areas. Stabilize any remaining disturbed areas.
END OF SECTION
Sewer Inspection/Cleaning 02010-4 10/2017
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Sewer Inspection/Cleaning 02110-1 10/2017
SECTION 02110
CLEARING, GRUBBING AND SITE RESTORATION
PART 1 GENERAL
1.1 DESCRIPTION
A. Scope: Furnish all labor, materials, equipment and incidentals required to perform
all clearing, grubbing, site restoration and fencing within the limits of work as
specified and required by the OWNER.
B. Restore with topsoil, fertilizer, seed and mulch all unpaved areas disturbed by the
CONTRACTOR’S operations.
C. Related Work Specified in Other Sections Includes:
1. Section 01500 - Temporary Facilities and Controls
2. Section 02010 - Erosion and Sediment Control
1.2 QUALITY ASSURANCE
A. Codes and Standards: State and local laws and code requirements govern the
hauling and disposal of trees, shrubs, stumps, roots, rubbish, debris and other
matter and the final restoration of the site. Obtain all permits required.
PART 2 PRODUCTS
2.1 MATERIALS
A. Fertilizer:
1. Provide fertilizer of standard commercial quality containing nitrogen,
phosphoric acid and potash in a 1:2:1 ratio and packed in the properly
labeled manufacturer's standards bags, which weigh less than 100 pounds.
Provide bag labeling consisting of manufacturer's name, net weight of
contents, type of material, and a guaranteed analysis on each container.
Store fertilizer in a weather proof storage area. Material that has become
caked or otherwise damaged will be rejected.
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B. Seed:
1. Provide all seed meeting the requirements of the Virginia Erosion and
Sediment Control Handbook Standard and Specification 3.32, and be
delivered in original unopened packages. All seed to be certified by the
Virginia Crop Improvement Association or the certifying agency in other
states. Guaranteed each package to be 95 percent pure and having an
analysis showing the following: Kind, Variety, Lot No., Lab Test No., Lab
Test Date, Pounds, Purity Percent, Germination Percent and Weed Seed
Percent. Packages which do not contain analysis certificates will not be
accepted.
2. Germination rate for seed to be a minimum of 85 percent within one year of
test.
3. Provide Permanent Seeding Mix in accordance with Table 3.32-D of the
Virginia Erosion and Sediment Control Handbook, for General Slope
Conditions.
4. Permanent seeding after October 16 will only be allowed if weather
conditions permit and with approval of the City. Do not seed when the
ground is frozen, or when soil and weather conditions would prevent proper
soil preparation.
5. Use temporary vegetation to stabilize temporary diversion dikes and
disturbed areas that will not be brought to final grade within 30 days, in
accordance with Virginia Erosion and Sediment Control Handbook
Standard and Specification 3.31.
C. Mulch:
1. Provide hay for mulching consisting of mowings of acceptable herbaceous
growth, which is free from noxious weeds; normally materials that are low
grade and unfit for farm use are acceptable. Calculate the weight on the
basis of the material not having more than 15 percent moisture content.
2. Provide straw for mulching consisting of stalks of oats or wheat crops that
are free from noxious weeds. Normally materials that is unfit for farm use is
acceptable for mulch. Calculate the weight on the basis of the material not
having more than 15 percent moisture content.
D. Lime:
1. Provide lime of agriculture grade palletized or pulverized limestone. Apply
lime as directed by the OWNER, generally apply palletized lime where
Sewer Inspection/Cleaning 02110-3 10/2017
potential run-off is possible to adjacent water. Use pulverized lime on level
areas.
2. Provide lime from a source registered with and approved by the Virginia
Department of Agriculture and Commerce in accordance with the Virginia
Agricultural Lime Law, as well as conform to VDOT Road and Bridge
Specifications.
E. Fencing:
1. Conform fence material to Section 507 of the VDOT Road and Bridge
Specifications.
2. Match and replace existing fencing distributed by Work at no additional cost
to OWNER.
PART 3 EXECUTION
3.1 CLEARING AND GRUBBING
A. Limit clearing to areas required by the Work. Correct damage outside these limits
resulting from the CONTRACTOR'S operations, at the CONTRACTOR's
expense.
B. Except as noted below, remove from the site and satisfactorily dispose of all trees,
shrubs, stumps, roots, brush, masonry, rubbish, scrap, debris, pavement, curbs,
fences and miscellaneous other structures not covered under other Sections as
specified or otherwise required to permit construction of the Work.
C. Dispose of trees, stumps and other cleared and grubbed material off the site of the
Work at no additional cost to the OWNER. No cleared or grubbed material may
be used in backfills or structural embankments.
D. No on-site burning will be allowed unless approved by authorities having
jurisdiction.
E. Trim trees and shrubs when doing so will avoid removal or damage. Trimmed or
damaged trees shall be treated and repaired by persons with experience in this
specialty who are approved by OWNER. Replace trees and shrubs intended to
remain that are damaged beyond repair or removed.
F. CONTRACTOR must comply with all City Ordinances on removal of trees and
must coordinate with the City’s Urban Forestry Department prior to tree removal.
Sewer Inspection/Cleaning 02110-4 10/2017
3.2 TOPSOIL REMOVAL AND INSTALLATION
A. Topsoil is defined as friable clay loam surface soil found in a depth of not less than
4 inches. Provide topsoil substantially free of subsoil, clay lumps, stones, and
other objects over 2 inches in diameter, and without weeds, roots, and other
objectionable material.
B. Strip topsoil which is satisfactory to whatever depths are encountered, and in such
manner as to prevent intermingling with the underlying subsoil or other
objectionable material. Remove heavy growths of grass from areas before
stripping.
1. Where trees are shown or directed to be left standing, stop topsoil stripping
a sufficient distance from such trees to prevent damage to the main root
system in accordance with the Virginia Erosion and Sediment Control
Handbook, Specification 3.38.
C. Stockpile topsoil in storage piles in areas approved by the OWNER. Construct
storage piles to freely drain surface water. Cover storage piles if required to
prevent windblown dust. Remove topsoil in excess of quantity required from the
site at the CONTRACTOR’S expense. Install silt fence at the base of the
stockpile.
D. Temporarily seed topsoil stockpiles remaining undisturbed for 30 days or more in
accordance with the Virginia Erosion and Sediment Control Handbook,
Specification 3.31.
E. Preparation for installation of topsoil:
1. Loosen subgrade of areas to receive topsoil to a minimum depth of 4 inches
by discing, harrowing or other approved method to permit bonding of the
topsoil to the subgrade. Operate the equipment used to scarify the subsoil so
the ridges and depressions are parallel to the contours.
2. Remove stones over 1-1/2 inches in any dimension and sticks, roots, rubbish
and other extraneous matter.
F. Installation of topsoil:
1. Install topsoil in accordance with Virginia Erosion and Sediment Control
Handbook, Standard and Specification 3.30, and as specified herein.
2. Place and spread topsoil, over all unpaved areas disturbed during
construction and as directed by the OWNER, to a minimum depth of 4
inches after natural settlement and light rolling, in a manner that the
Sewer Inspection/Cleaning 02110-5 10/2017
completed work conforms to the lines and grades of the pre-construction
ground surface.
3. Do not compact topsoil, except for light rolling.
4. After the topsoil is spread, remove all large, stiff clods, rocks, roots or other
foreign matter over 2 inches.
5. Apply soil amendments, as required by machine over all areas receiving
topsoil, to bring the soil to a neutral pH. Work lightly into the top 3 inches
of topsoil.
6. Manipulate topsoil to attain a properly drained surface.
7. Grade topsoil areas to smooth, even surface with loose, uniform, fine
texture.
8. Roll and rake and remove ridges and fill all depressions, ruts, low spots or
unsuitable areas which result after settlement so that the area is suitable for
subsequent work.
3.3 LIMING, FERTILIZING, SEEDING, MULCHING, HYDROSEEDING
A. Liming:
1. Uniformly spread lime at the rate of 2 tons per acre on areas to be seeded
prior to the areas being loosened or roughened.
B. Fertilizing:
1. Evenly spread fertilizer at the rate of 1,500 pounds per acre of area and
lightly worked in by an approved method.
C. Seeding:
1. Seed in accordance with the Virginia Erosion and Sediment Control
Handbook Standards 3.31 and 3.32, or as specified herein. Seed all areas
where topsoil has been placed, all areas where topsoil already exists but
requires reworking, and other regraded or disturbed areas within the Work
limit. Maintain seeded areas until a satisfactory growth is obtained. Restore
as specified above all grassed areas on which the grass is destroyed by
operation of the CONTRACTOR.
2. Evenly spread seed at the rate of at least 7 pounds of pure live seed per
1,000 square feet of area and lightly rake into the ground to a depth not to
Sewer Inspection/Cleaning 02110-6 10/2017
exceed 1/4-inch by any approved method. After seed placement, roll the
area.
3. Be responsible for all maintenance, watering, weeding and repair of failures,
to the seeded areas. Protect the seeded areas by whatever method necessary
until acceptance of the seeded areas by the OWNER. Produce a satisfactory
healthy stand of grass consisting of all the types of grass seeds sown.
D. Mulching:
1. Apply straw or hay mulch at the rate of 2 tons per acre in such a manner so
that not more than 10 percent of the soil surface is left exposed. No seeded
areas may be left unmulched for a period of more than 48 hours. After the
end of 48 hours, reseed the areas which were not mulched.
2. Anchor straw or hay mulch in accordance with the Virginia Erosion and
Sediment Control Handbook Standard Specification 3.35. Do not anchor
mulch with asphalt.
E. Hydroseeding:
1. CONTRACTOR may at his option spread fertilizer, seed and mulch with
hydroseeding equipment.
2. Submit to the OWNER for approval seed, fertilizer and mulch substitutes
required for hydroseeding.
3. Apply liquid fertilizer on a poundage basis, mixed with the same volume of
water that would be used with dry fertilizer.
4. Apply wood cellulose fiber mulch at a rate of approximately 1,500 pounds
net dry weight per acre and in such a manner to obtain a uniform
distribution of mulch.
3.4 MAINTENANCE
A. Maintain topsoiled areas by filling in erosion rills and correcting drainage as
required.
B. Maintain the topsoil in a loose, friable condition until the area is reseeded in
accordance with the requirements herein.
C. Maintain seeded areas until final acceptance but in no case less than 60 days after
planting.
Sewer Inspection/Cleaning 02110-7 10/2017
3.5 CLEAN UP AND PROTECTION
A. Conform to requirements specified in Section 01500 – Temporary Facilities and
Controls.
3.6 TEMPORARY EROSION CONTROL
A. Conform to requirements specified in Section 02010 – Erosion and Sediment
Control.
3.7 FENCING
A. Conform to Section 507 of the VDOT Road and Bridge Specifications and VDOT
Standard FE-CL.
3.8 INSPECTION AND ACCEPTANCE
A. When site restoration work is completed, including maintenance, the OWNER will
make an inspection to determine acceptability.
B. Where inspected work does not comply with the requirements, replace rejected
work and continue specified maintenance until reinspected by the OWNER found
to be acceptable. Remove rejected plants and materials promptly from the Project
site.
END OF SECTION
Sewer Inspection/Cleaning 02110-8 10/2017
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Sewer Inspection/Cleaning 02150-1 10/2017
SECTION 02150
BYPASS PUMPING
PART 1 GENERAL
1.1 DESCRIPTION
A. Scope: Furnish, construct, maintain and operate bulkheads, plugs, hoses, piping,
and pumps to bypass sewage flow in gravity sewers or force mains while
maintenance or project work operations are in progress. Divert flow by pumping
around the project location to a downstream manhole. Prevent backup or overflow
onto streets, yards and unpaved areas or into buildings, adjacent ditches, storm
sewers, and waterways, without diverting sewage outside of the sewer system.
Provide full redundancy for the bypass system.
B. Related Work Specified in Other Sections Includes:
1. Section 02651 - Television Inspection
2. Section 02760 - Cleaning of Sewers
1.2 QUALITY ASSURANCE
A. Meet the requirements of all codes and regulatory agencies having jurisdiction. Be
responsible for damage due to sewer backup or overflow onto streets, yards and
unpaved areas or into buildings, adjacent ditches, storm sewers, and waterways.
Be responsible for violations from sewage spills.
1.3 SUBMITTALS
A. Conform to the requirements of Section 01300 – Submittals.
B. Coordinate with the OWNER to determine the type and number of pumps to be
used. For bypass pumping systems of gravity sewers and force mains, submit,
prior to installation, a detailed plan and description outlining all details and
provisions of the temporary bypass pumping system. Provide plan, specific and
complete, including such items as schedules, locations, elevations, capacities of
equipment, materials and all other incidental items necessary and/or required to
insure proper operation of the bypass pumping system, including protection of the
access and bypass pumping locations from damage due to the discharge flows,
ability to pump dry weather and wet weather flows, and compliance with the
requirements and permit conditions specified in these Contract Documents. Do
not begin bypass pumping until all provisions and requirements have been
reviewed and approved.
Sewer Inspection/Cleaning 02150-2 10/2017
C. Include, at a minimum, the following in the bypass pumping:
1. Staging areas for pumps;
2. Flow stoppage system, including pipe and channel plugging method and
types of plugs;
3. Number, size, material, location and method of installation of pump suction
piping;
4. Number, size, materials, method of installation and location of installation
of discharge piping;
5. Bypass pump sizes, capacity, number of each size to be on site and power
requirements;
6. Calculations of static lift, friction losses, and flow velocity (pump curves
showing pump operating range shall be submitted);
7. Size and location of standby power generator, if required;
8. Downstream discharge plan;
9. Restraining lengths for piping;
10. Any temporary pipe supports and anchoring required;
11. Calculations for selection of bypass pumping pipe size;
12. Schedule for installation of and maintenance of bypass pumping lines;
13. Plan indicating selection location of bypass pumping line locations;
14. Road crossing details;
15. Protection against main breaks;
16. Method of noise control for each pump and/or generator;
17. Standby power generator size and location.
Sewer Inspection/Cleaning 02150-3 10/2017
PART 2 PRODUCTS
2.1 MATERIALS
A. Design piping, joints, and accessories to withstand at least twice the maximum
system pressure or 50 psi, whichever is greater.
B. Provide pumps of the automatic, self-priming type or submersible electric, in good
working order, with a working pressure gauge, vacuum gauge and a flowmeter on
the discharge. Provide pumps meeting the requirements of the City of Richmond
Noise and Sound Level Regulations. Supply all power for bypass pumping. All
pumps used must be constructed to allow dry running for extended periods of time
to accommodate the cyclical nature of sewer flows.
C. Provide stand-by pumps of adequate capacity, installed within the bypass system
using isolating valving.
PART 3 EXECUTION
3.1 FIELD QUALITY CONTROL AND MAINTENANCE
A. Unless otherwise directed by the OWNER, any time the bypass pumping system is
in place, an experienced operator shall be on site to monitor the operation, adjust
pump speed, valves, etc., make minor repairs to the system and report problems.
B. During bypass pumping, do not allow sewage to be leaked, dumped, or spilled in
or onto any area outside of the existing sewer system. Provide 100% watertight
bypass pumping system.
C. In the event of accidental spill or overflow, immediately stop the discharge and
take action to clean up, disinfect the spill and promptly notify the OWNER.
D. Prevent back-up of sewage in sewer laterals within the areas of pipe being bypass
pumped.
E. In the event of rain, coordinate the operation of bypassing with the OWNER.
F. High flow conditions may require the CONTRACTOR to temporarily suspend
work. Days on which work has been suspended shall not be considered working
days and no additional compensation will be provided by the OWNER.
G. Keep spare parts for each type of pump and piping on site as required.
Sewer Inspection/Cleaning 02150-4 10/2017
3.2 INSTALLATION AND REMOVAL
A. Locate the bypass pipelines to minimize any disturbance to existing utilities and
obtain approval of the pipeline locations from the OWNER.
B. During all bypass pumping operation, protect existing structures and equipment
from damage inflicted by any equipment. Be responsible for all physical damage
to the existing structures and equipment caused by human or mechanical failure.
C. When working inside existing structures, exercise caution and comply with
VOSHA requirements when working in the presence of gases, combustible or
oxygen-deficient atmospheres, and confined spaces.
D. The pipeline must be located off streets and sidewalks and on shoulders of the
roads. When the bypass pipeline crosses streets and driveways, place the bypass
pipelines in trenches and cover with temporary pavement. Upon completion of the
bypass pumping operations, and after the receipt of written permission from the
OWNER, remove all the piping, restore all property to pre-construction condition
and restore all pavement and pavement markings.
E. When bypass pumping operations are complete, drain or pump piping into the
sewer prior to disassembly.
END OF SECTION
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SECTION 02220
EXCAVATION AND BACKFILL
PART 1 GENERAL
1.1 DESCRIPTION
A. Scope:
1. CONTRACTOR shall provide all labor, materials, equipment and
incidentals required to perform all excavating, sewer abandonment,
backfilling, filling and grading, and disposing of earth materials as specified
and required for construction and repair of manholes, pipelines, roads, and
other facilities required to complete the Work in every respect.
2. Work shall conform to the City of Richmond requirements and where
construction is within the State right-of-way, the applicable requirements of
the Virginia Department of Transportation.
B. Related Work Specified in Other Sections Includes:
1. Section 01500 - Temporary Facilities and Controls
2. Section 01564 - Waste Material Disposal
3. Section 02010 - Erosion and Sediment Control
4. Section 02110 - Clearing, Grubbing and Site Restoration
1.2 QUALITY ASSURANCE
A. Tests:
1. Engage the services of a certified, independent testing laboratory to make
tests and determine acceptability of the fill or material as listed below and
required by the OWNER. All test results submitted to the OWNER shall be
certified by the testing laboratory for accuracy and compliance to these
specifications. Laboratory shall be employed by the OWNER.
2. Required Tests:
a. Select Fill, Subbase Material, General Backfill Samples: Gradation,
ASTM D 422.
b. Compaction, ASTM D 1556 and ASTM D 698, and ASTM D 2922.
B. Permits and Regulations:
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1. CONTRACTOR shall obtain all necessary City of Richmond and
Commonwealth of Virginia permits for work in roads, rights-of-ways,
railroads, etc. Also obtain permits as required by local, state and federal
agencies for discharging water from excavations.
2. Perform excavation work in compliance with applicable requirements of
governing authorities having jurisdiction.
3. All VOSHA safety measures, including but not limited to trenching,
confined space, traffic control and other applicable safety measures shall be
strictly adhered to and enforced by the CONTRACTOR. CONTRACTOR
shall develop a written plan that demonstrates compliance with VOSHA
requirements. A copy of the plan shall be maintained at the construction site
for the duration of the project.
C. Reference Standards: Comply with applicable provisions and recommendations of
the following except as otherwise specified.
1. ASTM A 36, Specification for Structural Steel.
2. ASTM A 328, Specification for Steel Sheet Piling.
3. ASTM D 422, Method for Particle-Size Analysis of Soils.
4. ASTM D 698, Test Method for Laboratory Compaction Characteristics of
Soil Using Standard Effort (12,419 ft-lb/ft3)
5. ASTM D 1556, Test Method for Density and Unit Weight of Soil in Place
by the Sand-Cone Method.
6. ASTM D 2922, Test Methods for Density of Soil and Soil-Aggregate in
Place by Nuclear Methods (Shallow Depth).
7. AISC Specifications for the Design, Fabrication, and Erection of Structural
Steel for Buildings.
8. VOSHA Standard.
1.3 SUBMITTALS
A. CONTRACTOR shall prepare drawings for the following items, if used in
completion of the Work:
1. Sheeting and bracing, or other protective system(s).
2. Dewatering system.
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3. Cofferdams.
4. Underpinning.
B. Drawings shall be prepared by a licensed professional engineer recognized as
expert in the specialty involved. Drawings shall be submitted to the OWNER for
record purposes only. Calculations shall not be submitted. Drawings submittals
will not be checked and will not imply approval by the OWNER of the Work
involved. CONTRACTOR shall be solely responsible for designing, installing,
operating and maintaining whatever system is necessary to satisfactorily
accomplish all necessary sheeting, bracing, protection, underpinning and
dewatering required to complete the Work.
C. Test Reports:
1. The testing laboratory shall submit copies of all test reports directly to the
OWNER, with copy to CONTRACTOR:
1.4 JOB CONDITIONS
A. Subsurface Information: If subsurface data is available, it is not intended as a
representation or warranty of continuity of conditions between soil borings nor of
groundwater levels at dates and times other than date and time when measured.
The OWNER will not be responsible for interpretations or conclusions drawn by
CONTRACTOR. Data are solely made available for the convenience of
CONTRACTOR. Additional test borings and other exploratory operations may be
made by CONTRACTOR at no cost to the OWNER.
B. Existing Structures: The Drawings, if any, may show certain surface and
underground structures adjacent to the Work. This information has been obtained
from existing records. It is not guaranteed to be correct or complete and is shown
for the convenience of CONTRACTOR. CONTRACTOR shall explore ahead of
the required excavation to determine the exact location of all structures. They
shall be supported and protected from damage by CONTRACTOR. If they are
broken or damaged, they shall be restored immediately by CONTRACTOR at his
expense.
C. Existing Utilities:
1. It shall be the responsibility of the CONTRACTOR to conduct the Work in
such a manner as to avoid damage to, or interference with, any utility
services. The CONTRACTOR is responsible for providing temporary
supports for any utility that may be affected by its work. If any damage,
interference, or interruption of service occurs as a result of his Work, it shall
be the CONTRACTOR’S responsibility to promptly notify the OWNER and
utility owner of the occurrence and to repair or caused to be repaired the
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damage immediately, at his own expense, and to the satisfaction of the
OWNER and the owner of the utility.
2. It shall be the CONTRACTOR’S responsibility to uncover and expose the
location of all service connections to avoid damage or interruption of
service. If damage occurs, the CONTRACTOR shall make the necessary
repairs in accordance with the above requirements.
3. It is the responsibility of the CONTRACTOR to determine in advance of
beginning the construction effort the exact location of all utilities, and the
effect they will have on the work by contacting “Miss Utility” for assistance
at 1-800-552-7001, 48 hours prior to starting work. All costs related to
identification of utility location shall be the responsibility of the
CONTRACTOR.
4. Do not interrupt existing utilities serving facilities occupied and used by the
OWNER or others, except when permitted in writing by the OWNER and
then only after acceptable temporary utility services have been provided.
5. Demolish and completely remove from site existing underground utilities
indicated to be removed. Coordinate with utility companies for shut-off of
services if lines are active.
6. The City may request additional subsurface utility engineering as a tool
during the design phase of projects under the contract items for Additional
Subsurface Utility Engineering. The Contractor shall furnish all labor,
materials, equipment, traffic control and appurtenant work and services to
provide Subsurface Utility Engineering in compliance with Quality Level
“A” of CI/ASCE 38-02, ASCE CI/ASCE 38-02, Standard Guideline for the
Collection and Depiction of Existing Subsurface utility Data as requested by
the OWNER. The Contractor shall also complete Subsurface Utility
Engineering in compliance with Quality Level “B” of CI/ASCE 38-02,
ASCE CI/ASCE 38-02, Standard Guideline for the Collection and Depiction
of Existing Subsurface utility Data as a referenced requirement in Quality
Level “A” of CI/ASCE 38-02, ASCE CI/ASCE 38-02. This bid items does
not relieve the CONTRACTOR of responsibilities as described in Section
02220, Excavation and Backfill during the performance of assigned work.
a. Test hole openings shall be a minimum 8” x 8” and not larger than
12” x 12”. Excavation shall proceed to expose the utility by vacuum
excavation in a careful manner with the utmost care for the safety of
personnel, the public and surrounding property. A field test hole
form will be completed for each excavation and will contain at a
minimum parameters required by the Standard 38-02, which include:
depth to the utility, outside diameter, height of conduits or
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encasement, utility material, pavement type/thickness and general soil
type. For duct systems such as electrical and telecommunication, top,
bottom and width of the utility will be documented.
b. A permanent marker will be placed over a reference point on the
utility flush with grade. This reference point is the centerline of pipes
or the edge of concrete structures. A minimum of three (3) ties will
be taken to the permanent marker. The depth to the reference point
on the utility will also be measured plumb to the permanent marker.
c. The excavation will be backfilled utilizing excavated materials. A
high epoxy content bituminous cold patch will be used for pavement
restoration and shall be guaranteed for a minimum of one (1) year.
d. The final submittal including AutoCAD files will be contained a pdf
binder file with Test Hole Inventory (index) and all Test Hole Forms.
This file will be emailed to the client ready for printing on 81/2” x
11” paper. Four hard copies shall also be sent to the client.
D. Protection of Persons and Property:
1. Barricade open excavations occurring as part of the Work and post with
warning lights and other protective measures as recommended by authorities
having jurisdiction.
2. Protect structures, utilities, sidewalks, pavements, and other facilities from
damage caused by settlement, lateral movement, undermining, washout and
other hazards created by Work or other operations in the area.
3. Comply with requirements of Section 01500 – Temporary Facilities and
Controls.
E. Dust Control: Conduct all operations and maintain areas of activity, including
sweeping and sprinkling of roadways, to minimize creation and dispersion of dust.
F. Protection of Trees: Protect trees, shrubs, lawns, existing structures, and other
permanent objects outside of grading limits, and in accordance with requirements
of Section 02110 - Clearing, Grubbing and Site Restoration and Section 01500 –
Temporary Facilities and Controls.
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PART 2 PRODUCTS
2.1 SOIL MATERIALS
A. OWNER may approve other acceptable fill materials for select fill, common fill,
subbase material, pipe bedding, and general backfill.
B. Select Fill:
1. Materials for Select Fill: Use gravel, crushed stone, limestone screenings or
other granular or similar material as approved which can be readily and
thoroughly compacted to 95 percent of the maximum dry density obtainable
by ASTM D 698. Place select fill where specified below and around
structures, pipelines, roads, walks, and other work.
2. Grade select fill between the following limits:
U.S. Standard
Sieve
Percent Passing
by Weight
2 inch 100
1-1/2 inch 90-100
1 inch 75-95
1/2 inch 45-70
#4 25-50
#10 15-40
#200 5-15
3. Advise the OWNER in writing of source and, if required, submit a sample
and gradation report of the material for approval.
C. Common Fill:
1. Materials for Common Fill: Material from on-site excavation in unpaved
areas may be used as common fill provided that it can be readily compacted
to 95 percent of the maximum dry density obtainable by ASTM D 698, and
does not contain unsuitable material. Select fill may be used as common fill
at no change in the Contract Price. VDOT No. 21A stone shall be used for
work in paved areas.
2. Granular Materials On-Site: Granular on-site material, which is fairly well
graded between the following limits may be used as granular common fill:
U.S. Standard
Sieve
Percent Passing
by Weight
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3 inch 100
#10 50-100
#60 20-90
#200 0-20
D. Subbase Material: VDOT No. 21A stone.
E. Pipe Bedding
1. Pipe bedding for concrete pipe shall be open graded coarse aggregate
VDOT Size No. 57 or No. 21A. Pipe bedding for ductile iron pipe should
be VDOT Size No. 21A. The stone shall conform to Section 203 of the
VDOT specifications.
2. For PVC pipe, pipe bedding and initial pipe backfill to 1 foot over the top of
pipe shall be select fill.
F. General Backfill and Fill Materials:
1. Provide approved soil materials for backfill and fill, free of clay, rock or
gravel larger than 2 inches in any dimension, debris, waste, frozen materials,
vegetable and other organic matter and other deleterious materials.
Previously excavated materials meeting these requirements may be used for
general backfill.
2. Approved materials must be at moisture condition suitable for compaction
at required density.
PART 3 EXECUTION
3.1 INSPECTION
A. Examine the areas and conditions under which excavating, filling, and grading are
to be performed. Also, remedy any conditions detrimental to the proper and
timely completion of the Work. Do not proceed with the Work until unsatisfactory
conditions have been corrected in manner acceptable to the OWNER.
3.2 PREPARATION
A. Immediately notify the agency or company owning any existing utility line which
is damaged, broken, or disturbed. Obtain approval from the OWNER and agency
for any repairs or relocations, either temporary or permanent.
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B. Maintain permanent benchmarks, monumentation, and other reference points.
Unless otherwise directed in writing, replace those which are damaged or
destroyed.
3.3 EXCAVATION
A. All excavation will be conducted in accordance with “Virginia Occupational
Safety and Health Standard for the Construction Industry.”
B. Perform all excavation required to complete the Work specified and required.
Excavations shall include earth, sand, clay, gravel, rock, hardpan, pavements,
rubbish and all other materials within the excavation limits. If excavations are
made between the required grades, without the written order of the OWNER, they
shall be backfilled with compacted Subbase Material, at the expense of the
CONTRACTOR.
C. Excavations for structures and pipelines shall be open excavations. Provide all
excavation protection systems required by ordinances, codes, law and regulations
to prevent injury to workmen and to prevent damage to new and existing structures
or pipelines. See Section 15051 – Buried Piping Installation for additional
requirements.
D. Where a structure or pipeline is to be placed below the ground water table, well
points, cofferdams or other acceptable methods shall be used to permit
construction of the structure or pipeline under dry conditions. Dry conditions shall
prevail until the pipelines are properly jointed, tested and backfilled. In addition,
protect excavation from flooding until all structures are in place and backfilling
has begun. Water level shall be maintained below top of backfill at all times. See
Section 15051 – Buried Piping Installation for additional requirements.
E. Pumping of water from excavations shall be done in such a manner to prevent the
carrying away of unsolidified concrete materials, and to prevent damage to the
existing subgrade. Dispose of water in accordance with Paragraph 3.6.
F. Excavations shall be extended sufficiently on each side of structures, footings, etc.,
to permit setting of forms, installation of shoring or bracing or the safe sloping of
banks.
G. Subgrades for roadways, structures and trench bottoms shall be firm, dense, and
thoroughly compacted and consolidated; shall be free from mud, muck, and other
soft or unsuitable materials; and shall remain firm and intact under all construction
operations. Subgrades which are otherwise solid, but which become soft or mucky
on top due to construction operations, shall be removed and replaced with No. 57
stone.
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H. Pipe Trench Preparation: See Section 15051 – Buried Piping Installation, for
additional requirements.
1. No more than 200 feet of trench may be opened in advance of pipe laying.
2. Trench width shall be minimized to greatest extent practical but shall
conform to the following:
a. Sufficient to provide room for installing, jointing and inspecting
piping.
b. Enlargements at pipe joints may be made if required and approved by
the OWNER.
c. Sufficient for shoring and bracing, or shielding and dewatering.
d. Sufficient to allow thorough compaction of backfill adjacent to
bottom half of pipe.
e. Do not use excavating equipment which requires the trench to be
excavated to excessive width.
3. Depth of trench shall be as SPECIFIED. If required and approved by the
OWNER, depths may be revised.
I. Material Storage: Stockpile satisfactory excavated materials in approved areas,
until required for backfill or fill. Place, grade and shape stockpiles for proper
drainage. Locate and retain soil materials away from edge of excavations.
Dispose of excess soil material and waste materials as specified.
J. Where the OWNER considers the existing material beneath the bedding material
unsuitable, CONTRACTOR shall remove same and replace it with No. 57 stone.
K. Undercut Excavation For Trenching:
1. In the event unsuitable material is encountered at or below the level of the
pipe bed, areas of doubtful quality shall be jointly examined by the OWNER
and the CONTRACTOR. If approved by the OWNER and after agreement
as to the extent of the area, such material shall be removed and replaced.
Materials used for replacement shall be crushed stone or gravel aggregate
conforming to VDOT No. 57 stone, as directed by the OWNER.
2. Undercut excavation shall be unclassified and shall consist of removing and
disposing of unsuitable material located below plan grade, or finished
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subgrade, within the construction limits and in accordance with the Section
01150 – Measurement and Payment.
3. Undercut excavation shall be disposed of in a legal manner or as indicated
in the Contract Documents.
4. CONTRACTOR responsible for keeping undercut excavation dry.
L. Excavation Material Disposal: CONTRACTOR to assume responsibility for
disposal of all excavated materials and for payment of any dumping or tipping fees
associated with the disposed excavated materials. Any materials having been in
contact with sewer, as well as contents of cleaning trucks are to be disposed of by
federal, state and locally approved methods.
3.4 UNAUTHORIZED EXCAVATION
A. All excavation outside the lines and grades specified, and which is not approved
by the OWNER, together with the removal and disposal of the associated material
shall be at CONTRACTOR'S expense. Unauthorized excavations shall be filled
and compacted with No. 21A stone by CONTRACTOR at his expense.
3.5 SEWER ABANDONMENT
A. Sanitary sewers, storm sewers, sewer laterals and other culverts to be abandoned,
but not required to be removed, shall be thoroughly sealed at all open ends, and at
the structures in which they terminate as applicable. The open ends shall be sealed
with brick and mortar.
B. In addition to sealing open ends as specified above, and when specifically
required, all sewer mains, upon abandonment shall be filled by pumping with a
slurry sand/cement grout. Facilities to be filled shall be sealed at the downstream
end, pumped with the approved mixture, and sealed at the upstream end.
C. The bottom of abandoned structures shall be perforated or broken to prevent the
entrapment of water.
3.6 DRAINAGE AND DEWATERING
A. General:
1. Prevent surface and subsurface water from flowing into excavations and
from flooding adjacent areas.
2. Remove water from excavation as fast as it collects.
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3. Maintain the ground water level below the bottom of the excavation to
provide a stable surface for construction operations, a stable subgrade for
the permanent work, and to prevent damage to the Work during all stages of
construction.
4. Provide and maintain pumps, sumps, suction and discharge lines and other
dewatering system components necessary to convey water away from
excavations.
5. Obtain the OWNER’s approval before shutting down dewatering system for
any reason.
B. Disposal of Water Removed by Dewatering System:
1. Dispose of all water removed from the excavation in such a manner as not
to endanger public health, property, or any portion of the Work under
construction or completed.
2. Dispose of water in such a manner as to cause no inconvenience to the
OWNER or others involved in work about the site.
3. Convey water from the construction site in a closed conduit. Do not use
trench excavations as temporary drainage ditches. Provide erosion and
sediment control devices as required by the Virginia Erosion and Sediment
Control handbook prior to discharge to any receiving stream.
3.7 SHEETING, SHORING AND BRACING
A. General: See Section 15051 – Buried Piping Installation, and Section 02151 –
Shoring, Sheeting, and Bracing for additional requirements.
1. Used material shall be in good condition, not damaged or excessively pitted.
All steel or wood sheeting designated to remain in place shall be new. New
or used sheeting may be used for temporary work.
2. All timber used for breast boards (lagging) shall be new or used, meeting the
requirements for Douglas Fir Dense Construction grade or Southern Pine
No. 2 Dense, conforming to the applicable requirements of current VDOT
Road and Bridge Specifications.
3. All steel work for sheeting, shoring, bracing, cofferdams etc., shall be
designed in accordance with the provisions of the “Specifications for the
Design, Fabrication and Erection of Structural Steel for Buildings,” of the
AISC except that field welding will be permitted.
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4. Steel sheet piling shall be manufactured from steel conforming to ASTM A
328. Steel for soldier piles, wales and braces shall be new or used and shall
conform to ASTM A 36.
5. Maintain shoring and bracing in excavations regardless of time period
excavations will be open. Carry down shoring and bracing as excavation
progresses.
6. Unless otherwise specified, or ordered, all materials used for temporary
construction shall be removed when work is completed. Such removal shall
be made in a manner not injurious to the structure or its appearance or to
adjacent Work.
7. Safe and satisfactory sheeting, shoring and bracing shall be the entire
responsibility of CONTRACTOR.
B. Removal of Sheeting and Bracing:
1. Remove sheeting and bracing from excavations unless otherwise ordered in
writing by the OWNER. Removal shall be done so as to not cause injury to
the Work. Removal shall be equal on both sides of excavation to ensure no
unequal loads on pipe or structure.
3.8 TRENCH SHIELDS
A. Excavation of earth material below the bottom of a shield shall not exceed the
limits established by ordinances, codes, laws and regulations.
B. When using a shield for pipe installation:
1. Any portion of the shield that extends below the center line of an installed
rigid pipe shall be raised above this point prior to moving the shield ahead
for the installation of the next length of pipe.
2. The bottom of the shield shall not extend below the center line of installed
flexible pipe at any time.
C. When a shield is removed or moved ahead, extreme care shall be taken to prevent
the movement of pipe or structures or the disturbance of the bedding for pipe or
structures. Pipe or structures that are disturbed shall be removed and reinstalled as
specified.
3.9 GENERAL REQUIREMENTS FOR BACKFILL, FILL AND COMPACTION
A. Furnish, place and compact all backfill required for structures and trenches.
Unless otherwise specified, fill that meets the requirements of general backfill may
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be obtained from on-site sources. Additional materials, if required, shall be
furnished from off-site sources at no additional cost to the OWNER.
B. The material from on-site excavation in unpaved areas shall be used as backfill for
a depth of 4 feet from top of the excavation. Use VDOT No. 21A as a backfill
material for the remainder of the excavation depth. VDOT No. 21A stone shall be
used as a backfill material for the entire trench depth for work in paved areas
(streets, roadways etc.).
C. Backfill excavations as promptly as Work permits, but not until removal of shoring
and bracing.
D. Keep excavations dry during backfilling operations. Bring backfill around
structures and piping up evenly on all sides.
E. Place all backfill in pipe trenches which are below structures, other pipes, or paved
areas, in horizontal layers not exceeding 8 inches in depth and thoroughly compact
each before the next layer is placed. In other pipe trenches, compacted layers shall
be 6 inches up to the pipe center line and 12 inches thereafter.
F. Where pipe is laid in rock excavation, pipe bedding shall be carefully placed and
tamped over the rock before the pipe is laid. Depth of bedding shall be at least 6
inches for pipe 24 inches and smaller and 9 inches for pipe 27 inches. After laying
pipe, the balance of the backfill shall be placed as described herein.
G. Prior to the installation of pipes which are to be installed in fill sections, place the
fill as described herein, until a minimum height of 2 feet above the pipe is reached.
The fill for the trench width shall then be excavated and the pipe installed and
backfilled. The remainder of the fill shall then be placed.
H. Unless otherwise specified or directed by the OWNER, fill shall be placed in
horizontal loose lifts not exceeding 12 inches in thickness and shall be mixed and
spread in a manner assuring uniform lift thickness after placing.
I. Control the water content of fill material during placement within the range
necessary to obtain the compaction specified. In general, the moisture content of
the fill shall be within 3 percent of the optimum moisture content for compaction
as determined by laboratory tests. Perform all necessary work to adjust the water
content of the material to within the range necessary to permit the compaction
specified. Do not place fill material when free water is standing on the surface of
the area where the fill is to be placed. No compaction of fill will be permitted
with free water on any portion of the fill to be compacted.
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J. Do not place or compact fill in a frozen condition or on top of frozen material.
Remove fill containing organic materials or other unacceptable material and
replace with approved fill material.
K. Perform compaction of fill with equipment suitable for the type of material placed
and which is capable of providing the densities required.
L. Fill shall be compacted by at least two passes of all portions of the surface of each
lift by compaction equipment. One pass is defined as the condition obtained when
all portions of the surface of the fill material have been subjected to the direct
contact of the compactor.
M. Test the effectiveness of the equipment selected by CONTRACTOR at the
commencement of compaction by construction of a small section of fill within the
area where fill is to be placed. If tests on this section of fill show that the specified
compaction is not obtained, CONTRACTOR shall increase the number of
coverages, decrease the lift thicknesses or obtain a different type of compactor.
N. Perform backfill around structures using the specified procedures, except that
within 10 feet of foundations and underground structures, light compaction
equipment shall be used, with the gross weight of the equipment not exceeding
7,000 pounds. Provide equipment that is capable of the required compaction
within restricted areas next to structures and around piping.
O. The minimum density for backfill under structures and paved areas (not roadways)
shall be 95 percent of maximum density obtained in the laboratory in accordance
with ASTM D 698. Fill that supports piping, and walks and other unpaved areas
shall be 95 percent of maximum density. Minimum density for backfill under
roadways shall be in accordance with City of Richmond, Department of Public
Works Standards.
P. If the specified densities are not obtained because of improper control of
placement or compaction procedures, or because of inadequate or improperly
functioning compaction equipment, the CONTRACTOR shall perform whatever
work is required to provide the required densities. This work shall include
complete removal of unacceptable fill areas, and replacement and recompaction
until acceptable fill is provided.
Q. CONTRACTOR shall repair, at his own expense, any after settlement that occurs.
He shall make all repairs and replacements necessary within 30 days after notice
from the OWNER.
R. CONTRACTOR to provide OWNER with weigh tickets daily for select fill
material and disposal of excavated material disposal.
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3.10 WORK WITHIN PUBLIC STREETS AND ROADS
A. Any Work performed in public streets, roads or alleys shall conform to the City of
Richmond and Virginia Department of Transportation requirements and
recommendations.
B. Repair of any pavement shall be in accordance with the City of Richmond and
Virginia Department of Transportation requirements and recommendations.
C. CONTRACTOR shall take all required actions to insure highway safety when
working within public streets and roads. Highway safety measures shall conform
to the requirements of the Virginia Work Area Protection Manual and ANSI D6.1,
Manual on Uniform Traffic Control Devices for Streets and Highways.
3.11 GRADING
A. Uniformly grade areas within limits of grading under this Section, including
adjacent transition areas. Smooth subgrade surfaces within specified tolerances,
compact with uniform levels or slopes between points where elevations are
specified, or between such points and existing grades. After grading, compact
subgrade surfaces to the depth and percentage of maximum density for each area
classification.
3.12 DISPOSAL OF EXCAVATED MATERIALS
A. Comply with requirements of Section 01564 – Waste Material Disposal.
END OF SECTION
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Sewer Inspection/Cleaning 02513-1 10/2017
SECTION 02513
RESTORATION OF PAVEMENT
PART 1 GENERAL
1.1 DESCRIPTION
A. Scope:
1. The CONTRACTOR shall furnish all labor, materials, equipment,
supervision, and incidentals to restore the surface and the base of the roads
included in the work to its original condition or in a manner suitable to the
OWNER.
2. The thickness, type and extent, of the surface to be replaced shall be the
same thickness as that removed, or damaged during construction, unless
otherwise directed or specified.
B. Virginia Department of Transportation Specifications:
1. The CONTRACTOR shall perform all work in accordance with the
applicable sections of the Virginia Department of Transportation Road and
Bridge Specifications, latest edition, and all addenda, revisions,
supplemental conditions and other requirements of the Virginia Department
of Transportation.
2. Utilize proper sign layout and channelization devices (i.e., Cones, plastic
barrels, pavement marking, etc.) during construction, according to VDOT's
Virginia Work Area Protection Manual.
C. City of Richmond, Department of Public Works Specifications:
1. The CONTRACTOR shall perform all work in accordance with the
applicable sections of the City of Richmond, Department of Public Utilities
Specifications, latest edition, and all addenda, revisions, supplemental
conditions and other requirements of the City of Richmond, Department of
Public Works.
1.2 QUALITY ASSURANCE
A. Testing Laboratory:
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1. CONTRACTOR shall provide testing laboratory, services conforming to
Section 01411 - Testing Laboratory Services Furnished by CONTRACTOR.
2. Testing Laboratory shall perform all tests required by VDOT.
3. Testing Laboratory shall perform in-place density tests as specified in Para.
3.3.B. conforming to ASTM D2922 and D2950.
B. Reference Standards: Comply with the latest revision of the applicable provisions
and recommendations of the following, unless otherwise directed or specified.
1. Virginia Department of Transportation, Road and Bridge Specifications.
2. ASTM D2922, Tests for Density of Soil and Soil-Aggregate In Place by
Nuclear Methods.
3. ASTM D2950, Test for Density of Bituminous Concrete In Place by Nuclear
Methods.
4. Virginia Department of Transportation, Minimum Standards of Entrances to
State Highways.
5. Virginia Department of Transportation, Road and Bridge Standards.
6. U.S. Department of Transportation, Federal Highway Administration,
Manual on Uniform Traffic Control Devices for Streets and Highways
(MUTCD), Latest Edition.
7. The Virginia Department of Transportation, Virginia Supplement to
MUTCD, Latest Edition.
8. ASTM D2922, Tests for Density of Soil and Soil-Aggregate In Place by
Nuclear Methods.
9. ASTM D2950, Test for Density of Bituminous Concrete In Place by Nuclear
Methods.
C. In addition to the requirements stated in the Virginia Department of Transportation
Specifications, the following requirements supplement, add to or modify those
Specifications and shall govern in all conflicting cases.
1. Applicable Standards: The work shall be done in accordance with the
following:
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a. City of Richmond, Departmental Standards Drawing N-14000 (Sheets
1-25).
b. City of Richmond Sewer Specifications Issue of 1988.
c. City of Richmond Standard Specifications for Gas, Water System,
Construction and Maintenance DPU No. 1-92.
d. Bureau of Traffic Engineering, Traffic Order #2265 dated January 17,
1973, Traffic Control Specifications for street and sidewalk
construction.
e. Bureau of Traffic Engineering, Work Area Traffic Control Handbook
dated September 1988 (Volume 1 – Narrative & Illustrations and
Volume 2 – Traffic Control Layouts).
f. Latest rules and regulations governing construction, demolition and
excavation as adopted by the Safety Codes Commission of the
Commonwealth of Virginia.
g. Erosion and Sediment Control Handbook, Virginia Department of
Conservation and Recreation and Division of Soil and Water
Conservation.
1.3 VIRGINIA DEPARTMENT OF TRANSPORTATION ROAD & BRIDGE
SPECIFICATIONS – MODIFICATIONS: ADDITIONAL PROJECT
REQUIREMENTS
A. In the event of a conflict between the referenced VDOT Road and Bridge
Specifications and the modifications thereto listed below, the below listed
modifications shall govern.
B. Section 303 is amended as follows:
1. Excavation: All excavation encountered shall be considered unclassified,
shall consist of the removal of all materials encountered not specifically
provided for or included as a part of other bid items as indicated on the
drawings and shall include undercut excavation regardless of depth.
2. Side slopes shall be trimmed to neat lines and even surfaces with tops hand
raked to a rounded edge and slopes on a 2:1 where practical.
3. Where fill or backfill is required, it shall be made with suitable material
obtained from the project excavation if available. Should the
CONTRACTOR dispose of excavated material to the extent that sufficient
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material is unavailable for fill purposes, extra payment will not be made for
furnishing the required borrow. All fill areas shall be compacted to 95% of
AASHTO T 99 maximum density.
C. Section 315 is amended as follows:
1. The CONTRACTOR shall lay bituminous concrete on one-half of the
roadway at a time. When laying the first half of the roadway, traffic will be
maintained on the opposite side of the street. Traffic will not be allowed on
the newly laid surface until it has cooled and been rolled sufficiently in the
opinion of the Engineer.
2. Flagmen or off-duty Police Officers shall be provided, if requested by the
Engineer. If Flagmen are requested by the Engineer and not provided, the
work will be suspended until they are placed on the job.
3. Before the laying of the base is started in any block, the CONTRACTOR
shall verify that all castings are to the proper grade. Manhole and valve box
frames shall meet or be not more than a quarter of an inch below a sixteen
(16') foot straightedge laid on the finished pavement parallel to the center of
the street.
4. After the surface has been laid, the CONTRACTOR shall pour cutback
asphalt around the top of the adapter and tops if necessary. Asphalt paint
applied to the curb lines shall not show more than one (1") inch above the
finished pavement grade. Any curbs marred by excess asphalt shall be
cleaned by the CONTRACTOR at his expense. Curbs marred or broken by
the CONTRACTOR's equipment shall be repaired or replaced at the
CONTRACTOR's expense.
5. When padding driveways a one (1") inch board shall be laid in the flow line
of the gutter, and the padding shall be rolled before removing the boards.
These boards shall be held in a straight line while rolling the ramp.
D. Stripping: The CONTRACTOR shall strip old asphalt paving where directed by
the Engineer, either to investigate the base or to make the desired tie-in at
intersecting streets. In cutting tie-ins only one-half of the street can be cut out at a
time and padding placed on that half before cutting the other half of each side of
the intersection.
1.4 SUBMITTALS
A. Shop Drawings: Submit proposed job mix formula for approval giving complete
data on materials; including source, location, percentages, temperatures, and all
other pertinent data.
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B. Material Certificates:
1. Submit certificates for the following:
a. Coarse and fine aggregates from each material source and each
required grading.
b. Asphalt or tar cement for each penetration grade.
c. Job-mix design mixtures for each material or grade.
d. Density of uncompacted bituminous concrete.
e. Density of compacted bituminous concrete.
f. Density and voids analysis for each series of bituminous concrete
mixture test specimens.
g. Bituminous concrete plant inspection.
2. Certify that materials, mixtures and plant comply with Specification
requirements.
3. Certificates signed by CONTRACTOR.
1.5 JOB CONDITIONS
A. Weather Limitations: Use weather limitations in the VDOT Standards for the
following:
1. Application of bituminous prime coat.
2. Construction of base and surface courses.
B. Grade Control: Establish and maintain the required lines and grades, including
crown and cross-slope for each course during construction operations.
PART 2 PRODUCTS
2.1 MATERIALS
A. General:
1. Aggregate, mineral filler, bitumen, and prime coat shall be in accordance
with the VDOT specifications.
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2. Aggregate includes stone, gravel, slag and sand.
3. Mineral filler includes limestone dust, Portland cement, or other inert
material.
4. Bitumen includes asphalt and tar cement.
5. Prime coat includes asphaltic cutback, tar or asphalt emulsion.
B. Aggregate Base Course: Material for the aggregate base course shall be Type II
aggregate base material, dense graded aggregate Size 21B and conforming with
the applicable portions of the VDOT Road and Bridge Specifications, Sections
208 and 203.
C. Asphalt Concrete Base Course: Materials for the asphalt concrete base course
shall be Type BM-25.0 conforming to the applicable portions of the VDOT Road
and Bridge Specifications, Section 211.
D. Seal Coat, Prime Coat and Tack Coat: Material for seal coat, prime coat and tack
coat shall conform to the applicable requirements of the VDOT Road and Bridge
Specifications, Section 210.
E. Asphalt Concrete Surface Course: Bituminous concrete surface course shall be
VDOT Type SM-9.5 D material conforming to the applicable requirements of of
the VDOT Road and Bridge Specifications, Section 211.
2.2 PAVEMENT MARKING MATERIALS
A. Traffic lane marking paint with chlorinated rubber base.
B. Factory mixed, quick drying and nonbleeding, FS TT-P-115, Type III.
C. Color: Shall be as existed prior to removal of the pavement.
PART 3 EXECUTION
3.1 INSPECTION
A. Examine the subgrade on which pavement shall be installed. Notify the OWNER
in writing of conditions detrimental to the proper and timely completion of the
Work. Do not proceed with the Work until unsatisfactory conditions have been
corrected in a manner acceptable to the OWNER.
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3.2 SITE MAINTENANCE
A. The CONTRACTOR shall have no more than one hundred and fifty feet of street
or easement where the trench has been backfilled which has not been cleaned up.
If this length is exceeded the OWNER may stop the work unit the clean up is
caught up.
B. Construction Staging Area: The CONTRACTOR shall do the following:
1. Locate trailers and equipment as far as possible from nearby occupied
dwellings.
2. Keep the site neat and policed so that debris will not be transported to
neighboring properties by wind or other means.
3. Start construction equipment only when necessary in the mornings.
4. Do not leave construction equipment running needlessly.
5. Caution workmen to speak quietly and to use language that would not
offend citizens in the area.
6. Locate portable sanitary facilities on a secluded or concealed portion of the
site.
7. Where appropriate, provide lighting and/or fencing to make access to the
site during non-working hours more difficult.
8. When storing construction materials insure that they do not have a tendency
to become unstable.
9. Where dust may be a nuisance, provide means for dust control.
10. Backfill adjacent to and behind sidewalk and curb and cutter immediately
after stripping forms.
11. Access shall be maintained to all properties by the CONTRACTOR. The
cost of maintenance stone will be borne by the OWNER except in cases of
negligence on the part of the CONTRACTOR as determined by the
Engineer.
3.3 ADJUSTING UTILITIES AND CASTINGS
A. Resetting Castings: The CONTRACTOR shall be required to adjust sewer
manhole castings, gas, water valve and drip boxes to new grades. For large valve
and drip boxes the vertical adjustment shall be made with brick and cement
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mortar. The entire base of the box shall be placed on brick when set to new grade.
For small valve boxes the vertical adjustment is made by screwing the top section
and/or by installing a new mid section.
1. Sewer manhole castings shall be reset to grade on brick with cement mortar.
Virginia Power and telephone manhole castings will be reset by the
respective utility. Old pavement removed to adjust gas, water valve and
drip boxes and sewer manhole castings shall be replaced with similar
pavement on graded streets.
2. The CONTRACTOR shall properly place and fit the sewer rings and
adapters. Rings and adapters improperly placed shall be cut out and
replaced at the CONTRACTOR's expense.
3. The CONTRACTOR shall remove all materials which he causes to fall in
the sewer manholes and basins and reset all castings the day the castings are
disturbed. Work shall not be resumed the next day on any new work if the
CONTRACTOR has failed to clean out any sewer manhole or basin and
reset the castings of previous day's work until such time as previous day's
work is complete.
4. Concrete collars around sewer manhole castings and valve boxes shall be
Class "A3" Type I or II cement and shall be protected from traffic for three
(3) days. Backfill for valve boxes set to grade shall be compacted with a
pneumatic tamp to a minimum of ninety-five (95%) percent density
(Proctor).
5. On ungraded streets, whose final surface shall be concrete, castings, gas,
water valve and drip boxes shall be set to grade at outline above without
concrete collar.
B. Adjusting Utilities: In the event any existing gas or water lines, fire hydrants or
services have to be adjusted, the CONTRACTOR will be required to notify the
Department of Public Utilities seventy-two (72) hours prior to the time set for
uncovering the existing lines, adjusting hydrants, or adjusting service boxes. Any
adjustment to gas-water lines or fire hydrants will be done by the Department of
Public Utilities' forces. Uncovering lines will be done by this CONTRACTOR.
C. Adjusting or Constructing Basin Slabs
1. Basin Slabs: Where required, variable size of monolithic curb, gutter and
basin slab, or slit open inlet adaptable to sub-basins and catch basins or drop
inlets shall be constructed as shown in the City of Richmond's Departmental
Standard Drawing N-14000.
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3.4 CONSTRUCTION
A. Aggregate Base Course:
1. Furnish and place the aggregate base course in conformance with the lines,
grades, and cross section to match that of the existing pavement. Perform in
accordance with applicable portions of the VDOT Road and Bridge
Specifications, Section 309.
2. Construct the aggregate base to the depth required or directed and within
0.04 foot of the top of the aggregate base course elevation derived from the
existing grade elevations.
B. Prime Coat and Tack Coat:
1. Apply prime coat to the aggregate base course prior to placing the asphalt
concrete base course or the asphalt concrete surface course. Apply tack coat
between the layers of asphalt concrete base course and the asphalt concrete
surface course.
2. The method of application of the prime coat and tack coat shall conform to
the applicable requirements of Sections 310 and 311, respectively, of the
VDOT Road and Bridge Specifications.
3. Prime coat material shall be RC-70 applied at 0.4 gallons per square yard.
4. Tack coat material shall be RC-250 applied at 0.1 gallon per square yard.
5. The rate of application and type of asphalt material for prime coat or tack
coat may be modified by VDOT or by the Engineer to produce optimum
results based on the actual materials used and prevailing conditions during
construction.
C. Asphalt Concrete Subbase and Base Course:
1. Furnish and place hot mixed asphalt concrete base course on the completed
aggregate base course in conformance with the lines, grades, and cross
sections to match that of the existing pavement and in accordance with the
applicable portions of the VDOT Road and Bridge Specifications, Section
315.
2. A prime coat shall be applied to the aggregate base course prior to placing
the asphalt concrete base course and a tack coat shall be applied between
layers of the asphalt concrete base course.
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3. Asphalt concrete base course thickness tolerance shall be in conformance
with the VDOT Road and Bridge Specifications, Sections 315.07. The
elevation of the base course shall not deviate by more than 0.04 foot from
the top of the final base course elevation derived from the grade elevations
of the existing pavement.
D. Asphalt Concrete Surface Course:
1. Furnish and place hot mixed asphalt concrete surface course on the asphalt
concrete base course in conformance with the lines, grades, and cross
sections of the existing pavement, or approved by the OWNER.
2. Thickness or application rate shall be as specified herein.
3. The asphalt concrete surface course shall be constructed in accordance with
the applicable requirements of the Section 315 of the VDOT Road and
Bridge Specifications.
E. Crushed Stone Roadway:
1. Conform to the applicable requirements of Para. 3.3.A. of these
Specifications.
F. Shoulder Restoration:
1. Shoulder restoration shall conform to the applicable requirements of Section
305 of the VDOT Road and Bridge Specifications.
G. Repair of Asphalt Surface Treatment:
1. Damaged asphalt surface treatment shall be repaired in accordance with
Section 315 of the VDOT Road and Bridge Specifications.
2. Backfill shall be select material, placed in 4-inch layers, and compacted
with pneumatic tampers to 95 percent Standard Procter Density.
3. Aggregate base shall be 1-1/2 times the existing aggregate base depth or 8
inches in depth, whichever is greater.
4. Asphalt or cement concrete base courses shall be placed to match existing.
5. The area shall then be primed using RC-250 at the rate of 0.35 gallon per
square yard and covered with No. 68 stone at the rate of 25 pounds per
square yard. After completion of the prime work, the area will then be
sealed using CAE-2 at the rate of 0.3 gallon per square yard and covered
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with No. 78 stone at the rate of 25 pounds per square yard. This treatment
shall match the existing pavement elevation and cross section and result in a
smooth riding surface.
3.5 PAVEMENT QUALITY REQUIREMENTS
A. General: In addition to other specified conditions, comply with following
minimum requirements:
1. Provide final surfaces of uniform texture, conforming to the grades and
cross sections required or directed or matching that of the existing
pavement.
B. Density:
1. If directed by the Engineer, compare density of in-place material against
laboratory specimen or certificates on same asphalt concrete mixture. Use
nuclear devices.
2. Minimum acceptable density of in-place course material will be 90 percent
of the recorded laboratory specimen or certificate density. Maximum
acceptable density will be 98 percent.
C. Thickness: In-place compacted thicknesses shall equal or exceed the thickness
directed or specified.
D. Surface Smoothness:
1. Test finished surface of each asphalt concrete course for smoothness, using
a 10-foot straightedge applied parallel to and at right angles to centerline of
paved areas.
2. Check surfaced areas at intervals directed by Engineer.
3. Surfaces will not be acceptable if deviations exceed the following:
a. Base Course: 3/8 inch in 10 feet.
b. Surface Course: 1/4 inch in 10 feet.
c. Crowned Surfaces:
(1) Test crowned surfaces with a crown template, centered and at
right angles to the crown.
(2) Surfaces will not be acceptable if varying more than 1/4 inch
from the template.
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3.6 PATCHING
A. As directed by the OWNER, remove and replace all defective areas. Square cut
such areas and apply a tack coat, and fill with material matching existing road
surface. Compact to the required density.
3.7 CLEANING AND PROTECTION
A. Cleaning: After completion of paving operations, clean surfaces of excess or
spilled asphalt materials and all foreign matter.
B. Protect newly finished pavement until it has become properly hardened.
C. Protect openings of drainage structures in the area of paving until permanent
coverings are placed.
3.8 MARKING PAVEMENT
A. Cleaning:
1. Sweep surface with power broom supplemented by hand brooms to remove
loose material and dirt.
2. Do not begin marking pavement until approved by Engineer.
B. Application:
1. Using mechanical equipment, provide uniform straight edges in two
separate coats. Apply in accordance with paint manufacturer's
recommended rates.
C. Locations:
1. Pavement to be marked in accordance with the markings which existed prior
to removal or damage of the pavement.
2. Pavement markings at entrances to Residuals Storage Facilities shall comply
with VDOT Standards.
3.9 CURBS, GUTTERS, SIDEWALKS AND DRIVEWAYS
A. Curbs and Gutters: Curbs and gutters shall conform to Section 502 of the VDOT
Road and Bridge Specifications.
B. Restoration of concrete curbs and gutters, sidewalks and driveways shall be done
in full section. Patching or piecing of blocks will not be permitted.
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C. Permanent Driveways: The CONTRACTOR is advised that all existing
permanent driveways on the project are to be removed and replaced with new
concrete driveway crossing when so designated on the contract drawings or when
new curb and gutter is to be installed as part of this contract. A permanent
driveway shall be defined as a curb cut on a street which has existing curb or curb
and gutter. All other driveways shall be considered temporary driveways and the
property owner will be required to obtain a permit from the OWNER for a
permanent driveway which shall be installed during construction of the project.
The property owner may elect to have the CONTRACTOR install the new
permanent driveway or secure another contractor of his or her choice.
D. Salvage of Sidewalk Brick, Granite Spall, Cobblestone, Granite Curb, Durax
Block, And Other Building Materials: All salvaged materials are to be salvaged
and removed to OWNER approved storage area. CONTRACTOR responsible for
loss or damage of material salvaged during removal and storage. All salvaged
materials are to be handled with due care to avoid breakage and chipping. Granite
curb is to be carefully stacked with wooden strips between layers.
CONTRACTOR to replace lost or damaged salvaged materials at no cost to the
OWNER. Removal of salvaged materials to designated storage areas and proper
storage at those areas will be paid for under specific bid items.
E. Brick Sidewalk on Concrete Base
1. General: The work of this section shall comprise the furnishing, installing
and restoration of brick sidewalk as noted on the contract drawings. Brick
for new sidewalks and sidewalks that replace existing concrete sidewalks
shall be a North Carolina Common or an approved equal. Bricks for
reconstructed brick sidewalks shall consist of the existing bricks within the
area or areas of brick sidewalk designated on the contract drawing as brick
sidewalk improvement.
2. Preparation of Subgrade: The subgrade for new brick sidewalks,
reconstructed brick sidewalks, and sidewalks that replace existing concrete
sidewalks shall be prepared by the removal and satisfactory disposal of all
unsuitable material above the normal subgrade. All unsuitable material
shall include existing concrete sidewalk. Any material removed above
normal subgrade shall be disposed of by the CONTRACTOR in an area
approved by the OWNER. No tree roots encountered above normal
subgrade will be cut unless approved by the Engineer.
a. Wherever the existing ground surface is below normal subgrade, the
ground surface shall be brought up to normal subgrade with a suitable
material approved by the Engineer. The CONTRACTOR shall be
responsible for supplying all material required to bring the existing
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ground surface up to normal subgrade and shall be part of the bid
price for sidewalk.
b. Subgrade shall be compacted to a theoretical density of 95% at
optimum moisture and shall be graded off to a surface that will not
vary more than 1/2" at any one point from normal subgrade.
Wherever tree roots prevent excavation of existing ground surface to
normal subgrade, subgrade will be determined by the Engineer in the
field.
3. Concrete Base: Upon compaction and grading of subgrade, the subgrade
shall be cleaned of all loose and foreign material before the concrete
bedding is poured. After this has been done, a 4" concrete slab shall be
placed on the compacted subgrade.
4. Laying Brick: Bricks shall be stored in areas designated by the Engineer.
All bricks shall be carefully laid with the best face up in the pattern noted on
the contract drawings or designated by the Engineer. Bricks shall be cut,
not broken; using a high-speed masonry saw producing clean, sharp edges.
5. The bricks shall be laid on a 1/2" mortar bed with 1/8" joints between
bricks. A 1:3 cement-sand mixture shall be swept into the joints between
bricks and lightly sprayed with water. The CONTRACTOR is responsible
for removing all excess cement-sand mixture from surface of sidewalk prior
to spraying water.
F. Brick Sidewalk on Cement-Sand Bedding
1. Description: The term Brick Sidewalk shall refer to the removal and
replacement of existing concrete sidewalks and brick sidewalks with all new
bricks set on a sand cement bed as noted on the contract drawing.
2. Brands of Brick: Brick for new sidewalks and sidewalks that replace
existing concrete sidewalks shall be a North Carolina Common or approved
equal.
3. Preparation of Subgrade: The subgrade for new brick sidewalks and
sidewalks that replace existing concrete sidewalks shall be prepared by the
removal and satisfactory disposal of all unsuitable material above the
normal subgrade. Unsuitable material shall include existing broken
concrete sidewalk and existing brick sidewalk. Any material removed
above the normal subgrade shall be disposed of by the CONTRACTOR in
an area approved by the Engineer. Tree roots encountered above normal
subgrade shall not be cut unless approved by the Engineer.
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4. Wherever the existing ground surface is below normal subgrade, and a
property wall exists, the ground surface shall be brought up to normal
subgrade with a suitable material approved by the Engineer. The
CONTRACTOR shall be responsible for supplying all material required to
bring the existing ground surface up to normal subgrade and shall be part of
the bid price for Brick Sidewalk. In addition, if any area adjacent to the
brick sidewalk, on the property line side of the sidewalk, shall be lower than
the proposed sidewalk, the area between the property line and the sidewalk
edge shall be filled in and compacted with an approved material and seeded.
5. Subgrade shall be compacted to a theoretical density of 95% at optimum
moisture and shall be graded off to a surface that will not vary more than
1/2" at any one point from normal subgrade. Wherever tree roots prevent
excavation of existing ground surface to normal subgrade, subgrade will be
determined by the engineer in the field.
6. Back Face of Sidewalk: Wherever curb or an adjoining property wall do not
exist on the property line of a new brick sidewalk or sidewalks that replace
existing concrete or existing brick sidewalks, a retaining row of bricks shall
be set for the purpose of preventing the new brick sidewalk from sloughing
off. This retaining row of bricks shall be formed by setting new sidewalk
brick on end, side to side, in a row along the back edge of the sidewalk. The
lower portions of the retaining row of bricks shall be embedded in 2" of a
1:3 cement mortar. The cost of the retaining row of bricks shall be included
in the unit prices for brick sidewalk.
7. In the event the adjoining property is more than 10" above or below grade at
the property line, a concrete retaining wall in accordance with RW-2 or
RW-3 shall be constructed for the purpose of retaining the back face edge of
the proposed brick sidewalk.
8. Tree Boxes: Wherever trees exist within the brick sidewalk area or
wherever trees are to be placed in the brick sidewalk area, a tree box shall
be formed with the bricks which are to be used in the brick sidewalk. The
tree box shall be 5' by 5' (unless otherwise noted on the drawings) and shall
be formed by embedding bricks on side, end to end, in 2" of a 1:3 cement
mortar.
9. Cement-Sand Bedding: Upon completion of compaction and grading of the
subgrade, the subgrade shall be cleaned of all loose and foreign material. A
uniform layer of a 1:3 cement-sand mixture, 4" thick, shall be placed upon
the subgrade. This cement-sand bedding shall be screeded off and densified
by tamping or rolling so that the top surface of the cement-sand bedding will
be smooth with no more than 1/4" variation from a flat plane and shall be
densified to 95% of theoretical density, at optimum moisture. Sand used for
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sand bedding shall be uniform in gradation and free from foreign material.
Cement shall be Portland Cement and conform to ASTM C150. The
cement-sand mixture may be mixed in place by the CONTRACTOR.
10. Laying Brick: Bricks will be stored in areas designated by the Engineer.
All bricks shall be carefully laid with the best face up in the pattern noted on
the contract drawings or designated by the Engineer. Bricks shall be cut,
not broken; using a high-speed masonry saw producing clean, sharp edges.
11. The bricks shall be laid with a uniform 1/8" joint between each brick and
joints shall be filled with a 1:3 cement-sand mixture. Sand used for filling
joints shall be very fine in gradation and cement shall be Portland Cement
which conforms to ASTM C150. Wooden mallets or the wooden end of a
brick mason's hammer will be used to strike each brick to insure a proper set
during placement of the bricks and after sweeping the cement-sand mixture
into the joints.
12. Wetting Sequence: Once the cement-sand bedding is in place and the bricks
have been set upon the bedding, water shall be applied to the bricks in a
sufficient amount to insure hydration of the cement-sand bedding material.
After the brick sidewalk surface has completely dried from the initial
wetting for hydration of the bedding, the joints shall be filled with a dry
cement-sand joint filler and wet a second time for hydration of the joint
filler. Wooden mallets or the wooden end of a brick mason's hammer will
be used to strike each brick to insure a proper set during placement of the
bricks and after sweeping the cement-sand mixture into the joints. The
CONTRACTOR will be responsible for cleaning the brick surface of any
cement-sand material.
G. Special Brick Sidewalk Condition: Whenever an existing brick sidewalk is to be
replaced with all new brick and existing brick sidewalk restoration is a part of the
contract, the existing brick sidewalk to be replaced shall be removed by hand, by
the CONTRACTOR, culled and cleaned and used for the brick sidewalk
restoration. The unit price bid per square yard for brick sidewalk restoration shall
include the cost of removing by hand, culling and cleaning of the existing bricks
and moving to restoration area. If no brick sidewalk restoration is part of the
contract, the OWNER will remove part or all of the existing brick in any area
where existing brick sidewalk is to be replaced with all new brick sidewalk. All
bricks which remain, after the OWNER has completed its brick sidewalk removal
process or after bricks have been removed for brick sidewalk restoration as part of
the contract, shall be considered unsuitable material above subgrade.
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H. Restore Brick Sidewalk: Restoration and Spot Replacement
1. This item shall cover all work involved in spot replacement of missing brick
and the restoration to proper grade of existing brick sidewalk where noted
on the contract drawings.
2. Bricks in existing sidewalks where designated for restoration shall be
removed by hand and the subgrade shall be cut or filled, as required, until a
proper subgrade is obtained. Sand which is uniform in gradation and free of
foreign material shall be used as a fill material. The bricks removed and
replacement brick shall then be placed back in the sidewalk in such a
manner as to conform to the pattern of the sidewalk adjacent to the area
restored. Bricks shall be cut, not broken; using a high-speed masonry saw
producing clean, sharp edges. Once the existing bricks have been placed
back in the sidewalk, joints shall be filled with a 1:3 cement-sand mixture.
Sand used for filling joints shall be clean and very fine in gradation and
cement shall be Portland cement which conforms to ASTM C150. Wooden
mallets or the wooden end of a brick mason's hammer will be used to strike
each brick to insure a proper set during placement of the bricks and after
sweeping the cement-sand mixture into the joints. After the joints have
been filled with the cement-sand mixture, the brick sidewalk surface shall
be cleaned of all residue cement or sand by means of sweeping, washing, or
cleaning with an acid solution.
3. Once the brick sidewalk surface has been cleaned to the satisfaction of the
Engineer, a light coat of clean fine graded sand shall be placed on the brick
sidewalk surface for the purpose of producing a non-skid surface and to
insure complete filling of the joints. This light coat of sand will be removed
by the CONTRACTOR at the end of the job.
4. Whenever there is a deficiency of existing brick in an area designated for
brick sidewalk restoration, the deficiency shall be corrected by obtaining
bricks from areas designated for removal of existing brick sidewalk and
replacement with new brick or concrete. The existing brick sidewalk shall
be removed by hand, by the CONTRACTOR, culled and cleaned and used
for the existing brick sidewalk restoration. If no brick sidewalk removal and
replacement with new brick or concrete is part of the contract, the
CONTRACTOR will obtain all bricks needed for restoration work from the
OWNER storage yard and haul them to the site. If this is to occur it will be
noted on the drawings or made a part of the additional requirements of the
project.
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I. Realigning/Setting Granite Curb
1. Realigning: Granite curb to be realigned shall be carefully removed from its
present bed. The curb trench shall be graded and compacted so as to
provide the realigned curb minimum clearances of 4" under the curb and 6"
in front of and behind the curb. The curb shall then be placed back in the
trench and shimmed to correct line and grade with brick. After the curb has
been realigned, the curb trench shall be backfilled with concrete to a
minimum depth of 12". Special care shall be taken to insure that the
concrete completely fills the space under the granite curb.
2. Setting: This item includes the replacement of existing curb in bad
condition, filling in where curb is missing or setting a new granite curb line.
Where additional curb is specified, it will be furnished by the OWNER and
hauled to the site by the CONTRACTOR. The curb trench shall be
excavated, graded, and compacted so as to provide the new/replacement
curb minimum clearances of 4" under the curb and 6" in front of and behind
the curb. The curb shall be placed in the trench and shimmed to correct line
and grade with brick. After the curb has been set, the curb trench shall be
backfilled with concrete to a minimum depth of 12". Special care shall be
taken to insure that concrete completely fills the space under the granite
curb.
3. Joints: Joints between the sections of granite curb above the gutter line
wider than one-quarter (1/4) of an inch will not be accepted, and any rough
ends of the sections will have to be chiseled by the CONTRACTOR at his
expense to reduce the joint width to less than one-quarter (1/4) inch. The
joints shall be filled with 1:3 cement sand mortar.
J. Concrete Curb & Gutter, Valley Gutter
1. For typical Monolithic Curb and Gutter section see Plan N-14000, Sheet
#16. For typical valley gutter section see Plan N-14000, Sheet #26. Use
plan design specified.
2. Three (3") inch to four (4") inch holes shall be left in the curb opposite each
downspout to each house. Valley gutter shall not require holes.
3. Concrete curb or curb and gutter will not be considered complete for
payment until properly backfilled and compacted to the satisfaction of the
Engineer. Backfilling and compaction shall be done as soon as practicable
after forms are stripped.
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K. Wheel Chair Ramps: This item shall include all work involved in the construction
of ADA approved wheel chair ramps. All existing curb and sidewalk shall be
removed without injury to curb and sidewalk designated to remain and shall be
satisfactorily disposed of by the CONTRACTOR. The CONTRACTOR shall then
perform all required excavation or furnish and place an approved fill material so as
to obtain a proper subgrade. The subgrade shall then be compacted to a theoretical
density of 95% at optimum moisture for a depth of 6 inches. A 6 inch thick wheel
chair ramp shall then be constructed per Standard CG-12 (latest revision). All
asphalt pavement reconstruction required in connection with construction of wheel
chair ramps shall be performed as part of the bid unit price for wheel chair ramps.
1. Exposed Aggregate Finish shall be performed by wirebrushing, blasting, or
surface retarder unless another method is approved by the Engineer.
2. Concrete for the exposed aggregate finish shall conform to the requirements
of Section 203 of the specifications for the class specified, except that gravel
shall be uncrushed, and tan or brown in color.
3. The CONTRACTOR shall provide a sample of the exposed aggregate finish
for approval by the Engineer prior to beginning work. The sample shall be
at least 12 inches by 12 inches and approximately 2 inches in depth. The
approved sample shall be kept at the work site for comparison to completed
work.
L. Cement Concrete Sidewalk: The concrete shall be screeded to a true surface, free
from depression and other irregularities and shall be floated with a magnesium
alloy float. After it has taken its original set, it shall be floated again with a
magnesium alloy float to produce a hard smooth finish free from water. The
surface shall be given a light broom finish acceptable to the Engineer.
1. Should the sidewalk be too wide to properly finish from each side, it shall
be bridged so that the concrete will not be disturbed after it is screeded.
2. Wherever full width sidewalk is placed from the curb to the property line,
the sidewalk shall be placed in alternate blocks. The size of these blocks
shall be determined by the Engineer. Every effort shall be made to maintain
color and texture.
3. Where there are soil pipes draining into the streets at a lower elevation than
the proposed gutter grade, the CONTRACTOR will relay these pipes under
the sidewalk before paving, provided the property owner furnishes the
necessary soil pipe. This item may be deleted in whole or in part and shall
only be done if included as a bid item.
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4. Entrance walks connecting with the city sidewalk that have to be cut off
shall be cut with a concrete saw and all exposed ends faced up with mortar
cement, leaving a neat appearing surface. The cost of this work is to be
included in the price bid per square yard for concrete work.
3.10 MISCELLANEOUS PAVEMENT
A. Restore Durax Block Pavement
1. Description: Work shall consist of restoring damaged areas of pavement
with Durax Granite Paving Block, laid on a cement-sand base, with the
joints filled with asphalt and the entire surface covered with a pea gravel or
stone chip covering.
2. Durax Block: Durax Block shall be furnished by the OWNER. It shall be
picked up from the OWNER storage area and hauled to the site by the
CONTRACTOR; the cost of this work shall be included in the unit price bid
for the restoration work.
3. Cement-Sand Bedding: The cement-sand bedding shall consist of one (1)
part of Portland cement and three (3) parts of sand mixed dry in a
mechanical batch concrete mixer for one (1) minute.
a. The sand used shall conform to VDOT Specifications, sec. 202, for
Grading C.
b. The cement-sand bedding shall be not less than one-half inch or more
than one and one-quarter inches in thickness after blocks have been
laid and rolled.
4. Laying Durax Block: The Durax block shall be laid on the cement-sand
bedding in concentric, interlocking segments of about three (3) foot radius,
with broken joints, or to meet existing. The upper or wearing surface of
each block shall be flush with the general surface of the pavement, and four
(4) inches above the concrete base, if used, when the pavement is
completed. No joints between the blocks shall be more than one-half nor
less than one-quarter of an inch wide at the surface.
5. The joints shall then be filled by broadcasting with shovels and brooming in
with a hand broom, gravel which shall be clean and conform to VDOT
Specifications, sec. 203, for VA. size No. 78.
6. Ramming, Sprinkling, and Rolling: The pavement shall then be rammed
with a double rammer weighing not less than 125 pounds striking a steel
plate .75"x10"x18".
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7. The pavement shall then be sprinkled and then rolled with a tandem roller
weighing not less than five tons. The rolling shall begin at the gutter and
proceed toward the center of the street overlapping on successive trips by
one-half the width of the roller. The pavement shall then be rolled
diagonally in two directions (at 90). If the rolling is omitted, with the
approval of the Engineer, the pavement shall be re-tamped with a double
rammer and steel plate after sprinkling.
8. At this time the pavement shall be checked with a ten (10) foot straight edge
laid parallel with the center of the street and all irregularities greater than
one-quarter inch shall be corrected.
9. Asphalt Joint Filler: The gravel filler in the joints shall have thoroughly
dried before any asphalt joint filler is poured. The length of time necessary
for this drying depends upon the weather conditions, and will be determined
by the Engineer.
a. The filling of the joints shall follow as closely behind the paving
operations as the drying of the gravel in the joints will permit. The
laying of the Durax block will be stopped if the filling of the joints is
not kept up with the paving operations, to the satisfaction of the
Engineer.
b. Approved kettles or tanks of not less than 200 gallons capacity shall
be used for the heating of the filler. Joints shall be filled by pouring
the asphalt joint filler on the pavement and squeegeeing it into the
joints until they are full or by any other method approved by the
Engineer. The temperature at which the joint filler is to be used shall
be approved by the Engineer.
c. The asphalt cement joint filler shall conform to VDOT Specifications,
sec. 210, for asphalt cement penetration grade 60-70.
10. Cover Material: The pavement shall be immediately covered with clean
stone chips or pea gravel heated above 250F and meeting VDOT
Specifications, sec. 205, for VA. size No. 78.
11. Obligation of CONTRACTOR at End of Warranty Period: In addition to
the proper maintenance of the pavement during the period of warranty,
which shall include sanding if the surface becomes sticky in hot weather, the
CONTRACTOR shall at his expense, just before the expiration of the
warranty period, make such repairs as are necessary to the pavement where
it shows indication of having been defectively constructed.
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B. Restore Granite Spall Pavement
1. Description: This pavement is a roughly cut granite block wearing surface
as hereinafter described and locally known as "Spall". These Spall are to be
laid in a cement sand bed with sand and gravel filler or asphalt joint filler
and chip covering. The base is specified and paid for separately. Unless
otherwise specified the OWNER will furnish the Spall.
2. Granite Spall: Granite Spall shall be from four (4) to seven and one-half (7
1/2) inches deep, from three (3) to six (6) inches wide and from three (3) to
ten (10) inches long. The sides shall permit laying with joints not over
three-quarters (3/4) of an inch in width and joints of that width shall be
exceptional. The upper face shall be uniform to permit laying to the general
surface of the pavement.
3. Cement Sand Bedding: The Cement Sand Bedding shall consist of one (1)
part of Portland cement and four (4) parts of sand mixed dry in a mechanical
batch concrete mixer for one (1) minute.
a. The sand used shall conform to VDOT Specifications, sec. 202,
grading C.
b. The Cement Sand Bedding shall not be less than two (2) inches thick;
however, no more of this Bedding shall be placed than will permit the
placing, tamping, and rolling of the Spall before the initial set of the
Cement Sand Bedding.
4. Laying Spall: On this Cement Sand Bedding the Granite Spall shall be laid
at right angles to the center of the street. Each course of Spall shall be
approximately of uniform width and depth, and so laid that all longitudinal
joints shall be broken by a lap of at least two (2) inches. As each course is
laid the Cement Sand Bedding will fill the joints to within three (3) inches
of the surface of the pavement. Irregular shaped and odd sized Spall shall
be culled by the pavers.
a. After the Spall have been laid, the joints shall then be filled by
broadcasting with shovels from wheelbarrows and brooming in with
rattan or wire brooms ramming gravel, which shall be clean, and meet
the specifications given in Sec. 203 for gradation 57.
5. Ramming, Sprinkling and Rolling: After the joints of the pavement have
been filled with ramming gravel, the pavement shall then be thoroughly
rammed with double rammers weighing not less than on hundred and
twenty-five (125) pounds, to a firm unyielding bed with uniform surface and
to the proper grade and crown.
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a. Immediately after the ramming, the paving shall be sprinkled with a
hose.
b. The pavement then shall be thoroughly rolled with a power driven
tandem roller weighing not less than five (5) tons, first longitudinally,
beginning at the outer edge of the pavement and proceeding towards
the center, overlapping on successive trips by at least one-half (1/2)
the width of the roller.
c. The paving shall then be rolled again diagonally in two (2) directions,
the second diagonal rolling crossing the line of the first until all of the
Spall have been properly embedded in the Cement Sand Bedding.
d. The rolling shall be omitted at intersections and on grades steeper
than five (5) percent if directed to do so by the OWNER, in such
cases when rolling is omitted the pavement shall be thoroughly
rammed again after it has been sprinkled.
e. At this time the pavement shall be tested with a ten (10) foot straight
edge laid parallel with the center line of the pavement and any
irregularities exceeding one-quarter (1/4) of an inch must be
corrected as directed by the OWNER either by additional ramming,
rolling or the re-laying of the Spall.
6. Sand Joint Filler: When Sand Joint Filler is specified, the surface of the
pavement shall be covered with clean sand. River sand may be used if it
meets the approval of the OWNER or sand conforming to the specifications
given in VDOT Section 202, grading C may be used. This sand shall be
thoroughly broomed into the joints with hand brooms and sufficient sand
added to leave one-half thick covering cover the Spall when the street is
opened to traffic.
7. Asphalt Joint Filler: When "Asphalt Joint Filler" is specified in the
Proposal the gravel filler in the joints shall have thoroughly dried before any
filler is poured. The length of time necessary for this drying depends upon
weather conditions, and will be determined by the OWNER.
a. The filling of the joints shall follow as closely behind the paving
operations as the drying of the gravel in the joints will permit. The
laying of the Spall will be stopped if the filling of the joints is not
kept up with paving operations to the satisfaction of the Engineer.
b. Approved kettles or tanks of not less than 200 gallons capacity shall
be used for the heating of the filler. Joints shall be filled by pouring
the Asphalt Joint Filler on the pavement and squeegeeing it into the
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joints until they are full, or by any other method approved by the
Engineer.
c. The temperature at which the Joint Filler is to be used shall be
approved by the Engineer.
d. The Asphalt Cement Joint Filler shall conform to the VDOT
Specifications given in Section 210 for asphalt materials, penetration
grade 60-70.
8. Covering Material: Pea Gravel or Stone Chip Covering will only be used if
asphalt filler is specified. The pavement shall be immediately covered with
Pea Gravel after the filler has been poured. The Pea Gravel or Stone Chip
shall be heated to a temperature approved by the Engineer. It shall be clean
and conform to the specifications given in VDOT Sec. 203, for VA. size No.
8P.
9. Obligation of CONTRACTOR at End of Guarantee Period: In addition to
the proper maintenance of the pavement during the period of guarantee,
which will include refilling sand filled joints if they become open and
sanding the surface if pavement with asphalt joint filler becomes sticky in
the hot weather, the CONTRACTOR shall at his expense, just before the
expiration of the guarantee period, make such repairs as necessary to the
pavement where it shows indication of having been defectively constructed.
C. Solid Concrete Paving Units - Paving units shall be installed in accordance with
manufacturer's specifications, and shall include supply and placement of solid
concrete paving units and joint filling sand, excavation, granular base course, sand
bedding course, and edge restraints.
3.11 SITE MAINTENANCE
A. Throughout all phases of construction, the CONTRACTOR shall keep the work
site clean and free from rubbish, debris and dust. Dust nuisance shall be abated by
cleaning, sweeping, sprinkling with water or calcium chloride at no additional cost
to the OWNER. Care shall be taken to prevent spillage on haul routes. Any such
spillage shall be removed immediately and the route cleaned. If the use of water
results in mud tracking on adjacent streets, the project will be shut down until
streets are cleaned by the CONTRACTOR at his expense and no extra time will be
allowed for the time thus lost. Materials and equipment shall be removed from the
site as soon as they are no longer needed. If the CONTRACTOR does not respond
to the requests to clean the streets, they shall be cleaned by the OWNER and the
cost shall be deducted from payments due the CONTRACTOR.
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B. The CONTRACTOR shall maintain all trenches in a manner acceptable to the
OWNER until the trenches are accepted and approved for the replacement of
pavement. After paving or restoration is completed, the CONTRACTOR shall be
responsible for a period of twelve months for any settlement of trenches or
damages which may occur, requiring additional fill, additional pavement or other
corrective measures.
C. The CONTRACTOR shall promptly take such corrective action as may be
necessary to return the trenches to acceptable condition when notified by the
OWNER.
D. If the restoration or repair of defects is not completed in a reasonable length of
time, and after due notice the CONTRACTOR fails to complete the work, the
OWNER will do whatever is necessary to restore the roadway and right of way to
its original condition and complete the Work. The OWNER will deduct the actual
cost of such work plus a percentage of overhead and handling from the
CONTRACTOR estimate or will bill the CONTRACTOR for the actual cost plus
a percentage for overhead and handling of the Work, whichever is applicable.
END OF SECTION
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Sewer Inspection/Cleaning 02651-1 10/2017
SECTION 02651
TELEVISION INSPECTION
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes: Closed circuit television (CCTV) inspection of underground
pipeline mainlines, laterals, side sewers, and manholes to assure pipes have been
cleaned, to allow for a determination of rehabilitation needs, to document pre-
rehabilitation condition, or to document post-rehabilitation condition. Work may
include raising paved over or buried manholes and replacing manhole frames and
covers for CCTV inspection.
B. Related Work Specified in Other Sections Include:
1. Section 02150 - Bypass Pumping
2. Section 02652 - Sewer Manhole Inspection.
3. Section 02760 - Cleaning of Sewers
1.2 REFERENCES
A. Codes and standards referred to in this Section are:
1. National Association of Sewer Service Companies (NASSCO), Pipeline
Assessment and Certification Program©.
2. Virginia Occupational Safety and Health (VOSH) Compliance Program.
1.3 DEFINITIONS
A. Survey CCTV Inspection: Survey CCTV inspection is a video inspection by the
CONTRACTOR of sewer pipelines to determine existing conditions of the pipe
and the service lateral connections. Survey CCTV inspection includes the pan-
and-tilt video inspection of manholes. Survey CCTV inspection of the laterals
includes video inspection of service laterals using lateral launch cameras through
mainline sewers to determine existing conditions of the laterals.
1.4 SYSTEM DESCRIPTION
A. Performance Requirements:
1. Perform CCTV inspection using personnel trained and certified in the use of
NASSCO’s Pipeline Assessment and Certification Program© (PACP).
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Contractor shall submit PACP training certificates of all personnel doing the
work, to the OWNER. Survey records are to conform to the latest NASSCO
PACP codification.
2. Be aware that this Contract requires work in active sanitary and storm
sewers, and follow all federal, state, and local requirements for safety in
confined spaces. Conform to all guidelines set forth by VOSH Compliance
Program and be solely responsible for safety during performance of all
Work.
3. Be responsible for any damage to public or private property resulting from
the televising activities, and repair or otherwise make whole such damage at
no cost to OWNER.
4. Provide all necessary equipment:
a. CCTV Equipment: Select and use CCTV equipment that will record
onto a color digital recorder in a format compatible for transfer to
USB flash drive or external hard drive. Provide CCTV equipment
that produce instant color photographs of problem areas to document
unusual, questionable, or severe conditions found during the course of
the work. Take photographs whenever the condition ranking exceeds
a NASSCO PACP codification grade 3.
(1) Use television monitor and other components of the video
system capable of producing a minimum 500-line resolution
colored video picture.
b. Pipe Inspection Camera: Select and use a pan-and-tilt, radial viewing,
zoom capable pipe inspection camera specifically designed and
constructed for sewer inspections that is able to transmit a continuous
image to the television monitor as it travels through the sewer segment.
Provide cameras that are designed and manufactured for the inspection of
service laterals and side sewers that have a minimum diameter of 3”. Use
lateral launch cameras for service lateral inspection. The cameras shall
be able to pass through a 2-inch opening and to inspect 3- to 8-inch
diameter lateral pipes at least 70 feet from the mainline sewer. Use a
camera that is operative in 100 percent humidity conditions. Use a
pipe inspection camera that is provided with the following:
(1) Inspection Camera Pan-and-Tilt: Use a pipe inspection camera
that pans ± 275 degrees and rotates 360 degrees.
(2) Inspection Camera Zoom: Use a pipe inspection camera that is
capable of zooming 12X.
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(3) Inspection Camera Footage Counter: Use a camera with an
accurate footage counter which displays on the monitor the
distance of the camera from the centerline of the starting
manhole. Use a camera that has a minimum of 1,000 feet of
coaxial cable.
(a) Accuracy: Do not use marking on cable, or the like,
which would require interpolation for depth of manhole.
Use measurement meters that are accurate over the entire
length of the sewer line section being inspected and have
an error less than or equal to 2 feet per 100 feet. Prior to
recording the location of defect, service connection, etc.,
take up slack in the cable of the television inspection
camera to assure metering device is designating proper
footage. Check accuracy of the measurement meters
daily by use of a walking meter, roll-a-tape, or other
suitable device.
(4) Inspection Camera Resolution: Use a pipe inspection camera
that is a high-resolution color chip camera capable of producing
a minimum 500-line resolution colored video picture. Provide
picture quality and definition that is to the satisfaction of the
OWNER, but if unsatisfactory, remove equipment and accept
no payment for an unsatisfactory inspection.
(5) Inspection Camera Locating Device: Provide pipe inspection
cameras with a locating device to locate the sewer. Mark
location of the sewer aboveground with a green paint as
directed by the OWNER.
(6) Pipe Inspection Camera Transporters: Provide pipe inspection
cameras with transporters that position the pipe inspection
camera near the horizontal and vertical centerline of the
pipeline. Use power transporters that are driven by tracks or
wheels. Provide both track and wheel power transporters
during Work. Manual winches, power winches, TV cable and
powered rewinds, or other devices that do not obstruct the
camera view or interfere with proper documentation of the
sewer conditions may be used to move the camera through the
sewer line. Provide operator remote capability to “steer”
camera so as to navigate the piping in the center. Floating the
camera is not acceptable unless approved by the OWNER.
When floating, outrigger must keep device in center of piping
even around bends.
(7) Pipe Inspection Camera Lighting: Provide a lighting system
that allows the features and condition of the pipe to be clearly
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seen regardless of pipe size. A reflector in front of the camera
may be required to enhance lighting in dark or large diameter
pipes. Avoid excessive lighting in the pipes which may result in
exaggeration of the defects and pipe conditions. Equip the
camera utilized for CCTV with remote control devices to adjust
the light intensity.
c. CCTV Inspection Acquisition Software: Select and use CCTV
inspection acquisition software capable of generating printed reports
to submit to the OWNER on hard copy and on digital media.
(1) Use CCTV inspection acquisition software that is NASSCO
Pipeline Assessment and Certification Program© certified and
compatible with the code’s latest release.
(2) If required for viewing inspection reports on digital media,
provide the OWNER with viewing programs that are Microsoft
PC compatible.
(3) Acquisition software must be compatible with the City’s
current version of Arc GIS Desktop. The CONTRACTOR shall
coordinate with the City’s GIS department for GIS software
requirements.
1.5 SUBMITTALS
A. General: Provide all submittals, including the following, as specified in Division
1.
B. Submit the equipment manufacturer's operational manual and guidelines to the
OWNER for review. Strictly follow such instructions unless modified by the
OWNER.
C. Submit three sample inspection reports including videos and photos on a USB
flash drive from recent inspection projects of a similar nature. Submit the sample
inspection reports on digital media and provide hard copies.
D. Submit inspection reports and videos on USB flash drive to the OWNER for
review. Provide videos, photos and inspection reports compiled on external hard
drive(s) bi-weekly, if requested by the OWNER.
1. Provide inspection videos of a quality sufficient for the OWNER to evaluate
the condition of the sewer, locate the service connections, and verify
cleaning. If quality is not sufficient, CONTRACTOR shall re-inspect the
pipeline segment and provide inspection reports and videos on USB flash
drives at no additional cost to the OWNER. Camera distortions, inadequate
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lighting, dirty lens, or blurred/hazy picture will be cause for rejection of
videos and rejection of the associated line segment.
a. Submit one of the initial inspection videos to OWNER/ENGINEER
for review of video quality before inspections are completed.
OWNER/ENGINEER acceptance of initial video quality does not
prevent future rejection of any of the remaining videos.
b. OWNER or designee reserves the right to halt inspection during any
visit should picture quality be compromised and operator can not
correct.
2. Submit pipe inspections on an external hard drive(s) at end of project if
requested by the OWNER.
3. USB flash drives and external hard drive(s) submitted become the property
of the OWNER.
4. Maintain a master copy of all inspection reports, photos and videos
submitted until final acceptance of contract and through warranty period.
1.6 QUALITY ASSURANCE
A. Experience Requirements:
1. Verify that the CONTRACTOR has a minimum of 5 years of experience of
CCTV inspection of similar sized infrastructure.
2. The Contractor shall maintain on site at all times a competent field
supervisor in charge of the inspection. The field supervisor shall be
responsible for the safety of all site personnel and site conditions as well as
ensuring that all work is conducted in conformance with the specifications
and to the level of quality specified
PART 2 PRODUCTS
NOT USED
PART 3 EXECUTION
3.1 PREPARATION
A. Cleaning: Clean pipelines prior to CCTV inspections. Provide cleaning in
accordance with Section 02760 – Cleaning of Sewers.
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B. Notification: Notify the OWNER at least 24 hours in advance of any CCTV
inspection so that the OWNER may observe inspection operations.
3.2 CCTV INSPECTION OF PIPELINES
A. The specifications call attention to certain features but do not purport to cover all
details entering into the required work.
B. General: Perform CCTV inspection on one sewer section (i.e. manhole to
manhole) at a time.
C. Survey CCTV Inspection: Perform survey CCTV inspection immediately after
pipeline cleaning, unless specifically allowed by the OWNER. Do not allow
inspection camera to immediately follow behind the cleaning mechanism, but
rather follow once at a minimum distance of 8-feet from nozzle. Verify the
pipeline is clean, verify or measure the pipe sizes, determine existing condition of
the pipeline and locate service connections.
D. Flow Control: Adequately control the flow in the pipeline being CCTV inspected.
Do not exceed the depth of wastewater flow shown below:
Pipe Diameter
(Inches)
Depth of Flow
(Percent of Pipe Diameter)
6 – 10 10
12 – 24 15
Over 24 20
1. If during CCTV inspection of a sewer section, the wastewater flow depth
exceeds the maximum allowable, reduce the flow depth to an acceptable
level by performing the survey CCTV inspection during minimum flow
hours, by diversion pumping or by pulling a camera with swab, high-
velocity jet nozzle or other acceptable dewatering device. If pulling with a
jet nozzle, the camera must be a minimum of 8-feet from the nozzle. Divert
the flow in accordance with Section 02150 – Bypass Pumping.
2. No flow is allowed in the pipeline while performing post-installation CCTV
inspection. Divert the flow in accordance with Section 02150 – Bypass
Pumping.
E. Pipeline Inspection Camera: Move the pipe inspection camera through the pipeline
in the downstream direction at a uniform rate, stopping when necessary to ensure
proper documentation of the sewer's condition and service connections, but do not
pull the pipe inspection camera at a speed greater than 30 feet per minute or 9
meters per minute. Position camera for inspection at the center point of the
diameter or as nearest the center of non-circular piping.
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F. Pipeline Conditions: Inspect pipelines by use of the pan-and-tilt feature of the pipe
inspection to determine the condition of the pipeline. Document the conditions,
defects and observations of pipelines using NASSCO’s Pipeline Assessment and
Certification Program© codes.
G. Locating Point Repairs Necessary to Complete Inspection: If point repair is needed
in order for the continuous inspection to be completed from manhole to manhole
due to impassibility or sewer collapse, make a special note in the documentation
and inspection report as outlined in Section 3.3 below.
H. Inspection of Service Connections during Mainline Inspection: Inspect service
connections by use of the pan-and-tilt feature of the pipe inspection camera.
Include the connection to the sewer main and lamping inspection up the service
pipe, recording all defects found in the service connection as the focus of the
inspection. Observe flows from service connections for approximately two
minutes to ascertain if the flow is sanitary or extraneous flow. The video recording
may be paused during observation. Record the results of the flow observation.
I. Inspection of Laterals and Side Sewers: Inspect lateral and side sewer connections
with a lateral launch camera that can be conveyed through the lateral from the
mainline. The limit of inspection of service lateral shall be televised and inspected
from mainline sewer to property line.
J. Inspection of Infiltration: Quantify visible leakage of extraneous flow into the
sewer by the operator and recorded on electronic log and audio.
K. Communication: Whenever non-remote powered and controlled winches are used
to pull the television camera through the line, set up telephones, radios, or other
suitable means of communication between the operators positioned at the two
manholes of the sewer line being inspected to ensure that good communications
exist between members of the crew.
L. Visual Recording of CCTV Inspection: Make CCTV inspections continuous for
pipe segments between manholes. Do not leave gaps in the visual recording of a
sewer segment and do not show a single segment on more than one visual
recording, unless specifically allowed by the OWNER.
M. Passage of Inspection Camera: If during CCTV inspection of a pipeline, the
camera is unable to pass an obstruction even though flow is unobstructed, inspect
the pipeline from the other direction (reverse setup) in order to obtain a complete
inspection of the pipeline. Whenever such a condition arises, notify the OWNER
to determine if an obstruction removal or point repair is necessary. When the
CONTRACTOR encounters a protruding tap that prevents the passage of the
camera, grind the protruding tap as specified in Section 02760 – Cleaning of
Sewers unless otherwise directed by the OWNER. After the protruding tap is
removed, complete the CCTV inspection of the pipeline.
Sewer Inspection/Cleaning 02651-8 10/2017
1. When the camera is moving from the other direction in order to survey on
either side of an obstruction and a second repair location is encountered
away from the first obstruction, notify the OWNER and request a review of
the CCTV video.
N. CCTV Inspection Quality: Reject CCTV inspections that have camera distortions,
inadequate lighting, dirty lens, excessive lighting or blurred/hazy picture of the
associated line segment. Re-televise any CCTV inspection deemed unacceptable
by the OWNER at no additional cost to the OWNER. Payment for televised
inspection will not be made until OWNER approves the quality of the inspection
report and video.
3.3 DOCUMENTATION AND INSPECTION REPORT
A. Inspection Report: For each CCTV inspection, provide a completely printed
inspection report generated by the CCTV inspection acquisition software that
clearly identifies the location of defects and observations indexed in relation to
adjacent manholes. Record the direction of the pipe at the starting manhole.
Record defects and observations that shall be recorded include structural
deficiencies, the locations and estimations of extraneous flows of service
connections, joints, infiltration, unusual conditions, material transitions, roots,
storm sewer connections and cracked or collapsed sections, the presence of scale
and corrosion, signs of previous leakage, sewer line sections that the camera failed
to pass through and reasons for the failure and other discernible features and data
of significance. Document defects and observations in inspection reports, and
supply a copy of such records to the OWNER.
1. Hard Copy: Provide three (3) hard copies of the inspection report to the
OWNER.
2. Digital Media: Provide the inspection report to the OWNER on digital
media that is Microsoft PC compatible. Provide computer files in standard
format. Contact the OWNER for format requirements.
3. Defect and Observation Codes: Document defects and observations utilizing
the latest release of NASSCO’s Pipeline Assessment and Certification
Program© codes. Provide a table listing acronyms and their meaning with
the logs.
4. JPEG Images: Each inspection report shall provide JPEG images of defects
greater than NASSCO PACP codification grade 3 and observations,
including looking up all service laterals, surveyed during CCTV inspections
in the inspection report. Link JPEG images to inspection report for viewing
and printing when reviewing inspection reports on digital media.
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5. MPEG Video: Provide a link to the MPEG video for each defect and
observation surveyed during the pipeline inspection. Videos must play via
standard MPEG-ready software, requiring no proprietary software.
6. Pipeline Condition Rating: Provide a pipeline condition rating in each
inspection report. Use NASSCO’s Pipeline Assessment and Certification
Program©, Condition Grading System to determine the pipeline condition
rating.
7. Inspection Report Format: Provide each inspection report with the
following:
a. CCTV Inspection Form: Provide each inspection report with a CCTV
Inspection Form. Use a CCTV Inspection Form that is of a layout
and format in accordance with NASSCO’s Pipeline Assessment and
Certification Program©, CCTV Inspection Form. Other layouts and
formats equivalent to NASSCO may be submitted, upon approval by
the OWNER.
b. CCTV Inspection Graphic Form: Provide each inspection report with
a CCTV Inspection Graphic Form. Include the following in the
CCTV Inspection Graphic Form:
(1) A pipeline illustration showing the pipe and the upstream and
downstream manholes. Show the location of the each defect
and observation in the pipeline illustration.
(2) A record of each defect and observation from the starting
manhole during the inspection. Include the distance from the
starting manhole, NASSCO’s Pipeline Assessment and
Certification Program© codes, and identify the JPEG image for
each defect and observation.
(3) Direction of flow and direction of camera movement.
c. CCTV Inspection Image Form: Provide each inspection report with a
CCTV Inspection Image Form. Show a record of each defect and
observation during the inspection with JPEG images displayed with
each defect and observation.
d. Pipeline Condition Rating Form: Provide each inspection report with
a Pipeline Condition Rating Form. Include the following in the
Pipeline Condition Rating Form:
(1) List the number of structural defects and the number of
operation and maintenance defects per condition grade,
(Condition Grades 1 through 5).
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(2) List the Structural Pipe Rating, Operations and Maintenance
Pipe Rating, Overall Pipe Rating and Pipe Rating Index.
B. Digital Video/Audio Recording: Provide each inspection report with video of the
inspection on USB flash drive.
1. Include both audio and video information that accurately reproduces the
original picture and sound of the CCTV inspection. Provide the video
portion of the digital recording that is free of electrical interference and
produces a clear and stable image. Provide the audio portion that is
sufficiently free of background and electrical noise as to produce an oral
report that is clear and discernible.
2. Include in the digital recording a visual and audio narrative noting:
a. Date, time of day, and depth of flow;
b. Sewer segment number as provided by OWNER;
c. Upstream manhole number;
d. Downstream manhole number;
e. Type of sewer (e.g. sanitary, storm, combined);
f. Size of sewer;
g. Sewer materials of construction;
h. Closest street address and street name on which sewer is located;
i. Direction of movement of camera, heading, and direction of flow;
j. Reason for inspection.
3. Create separate MPEG video files for each pipe segment inspected. If a
reverse setup is required, store the individual portions of that pipe segment
in separate MPEG video files.
4. Provide a USB flash drive for each pipe segment inspected. A maximum of
five (5) pipe segment inspections may be included on the same flash drive as
long as they are contiguous. Provide flash drives that are readable.
Unreadable/corrupted flash drives will be returned and new ones provided at
no cost to the OWNER. Compile pipe inspections onto an external hard
drive(s) at end of project and provide to the OWNER if requested by the
OWNER.
5. Continuously display the manhole reach (i.e., manhole to manhole), date,
time and length (in feet and tenth of feet) from starting manhole on the
MPEG video. Place information on screen where it is clearly visible but
does not interfere with video image.
6. Perform the pipeline inspection that consists of identifying a location both
within the pipe segment (physical location) and within the digital recording
(video frame location) for each defect or observation. Do not use time codes
Sewer Inspection/Cleaning 02651-11 10/2017
for defect location. This will allow the digital recording and inspection data
to be cross-referenced for instant access to any point of interest within the
digital recording.
7. File Naming Convention: Pipeline inspection report and video files shall be
named in the following convention separated with an underscore to assign a
standardized identification number for each inspection.
a. First Four Letters of Street Name
b. Date of the Inspection (yyyymmdd)
c. Address (with no punctuation)
d. Assignment or Work Order (WO) Number
e. Line Segment (LS) Number
f. Upstream MH ID/Top Elevation
g. Downstream MH ID/Top Elevation
h. Pipe Diameter (inches)
i. CCTV Footage (ft)
j. Basin Number
k. Council District Number
If the street name is a number, use street number without direction (N,S,E,W);
for example: 04th. The address could be a block number or specific house
number for a lateral inspection. If the line segment is located in an alley
running parallel between two streets (with adjacent houses being odd
numbers); for example: 1200 Warren Ave (odd alley).
File naming example: 1st 4 Letters of St. Name (Warr)_Date (20180914)_Address
(1200 blk Warren Ave)_WO No. (92657)_LS No. (1 of 4)_U/S MH Top EL
(196.90)_D/S MH Top EL (198.05)_Pipe Diameter (8)_CCTV Footage
(228.1)_Basin No. (NS-01)_Council District No. (3).
“Warr_20180914_1200 blk Warren Ave_92657_1 of 4_196.9_198.05_8_228.1_NS-
01_3”.
8. USB Flash Drive and External Hard Drive Label: Place a tag with a typed
label on the USB flash drive. For external hard drive, attach a typed label on
the face of the hard drive. The label shall include the following information:
a. Assignment or Work Order Number
b. CONTRACTOR’S Name
c. Inspection Type: Survey, Pre-Installation, Post-Installation
d. Date of the Inspection
e. Date Submitted
f. Basin Number
g. Street Name
h. Pipe Diameter
i. Pipe Length
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j. Street Name
k. Pipe Condition Rating as Established by the OWNER
3.4 CCTV INSPECTION OF MANHOLES DURING PIPELINE CCTV
A. Manhole Inspection: Record panning the beginning and ending manholes of a
sewer segment to demonstrate that all debris has been removed and to view the
condition of the invert, bench, and sidewalls of the manholes including pipe
connections in the manhole. Record pipe connections starting from outgoing or
effluent pipe and move clockwise to cover all the pipes in the manhole. This
information is a supplement to the requirements in Section 02652- Sewer Manhole
Inspection.
B. Raising Buried Manholes: If, in the progress of the Work, it is found that some
manhole covers are buried beneath the pavement, notify the OWNER. If the
OWNER determines that access through the manholes is vital to the Work, expose
the cover and reset the frame so that the cover is flush with the pavement. Restore
the pavement surrounding the manhole to match the existing pavement. Perform
pavement restoration in accordance with Section 02513 – Restoration of Pavement.
Replace manhole frame and cover if required. Such work will be reimbursed by
the Contract Items 45, 46 and 47 for manhole frame and cover replacement and
manhole risers, respectively.
3.5 MANHOLE FRAME AND COVER REPLACEMENT
A. Installation:
1. Remove cover and existing paving adjustment rings and clear manhole
frame rim of any loose material and debris.
2. Excavate existing pavement or unpaved area to expose existing frame and
top of manhole chimney.
3. Remove existing frame and any loose material and debris from top of
manhole chimney.
4. In paved areas, combine precast concrete adjustment rings so that the top of
the installed casting shall match finished grade.
5. In unpaved and grassy areas, combine precast concrete adjustment rings so
that the top of the installed casting extends at least 6 inch above finish grade.
Gradually slope the surface up to top of casting and surface graded to
provide positive drainage away from manhole.
6. Apply an approved sealant between the top adjustment ring and the manhole
frame. Apply no less than two beads ½-inch wide and ¾-inch high. Apply
an approved manhole cementitious lining material between the rings and no
Sewer Inspection/Cleaning 02651-13 10/2017
less than 1 inch of lining material to the inside and outside face of the
adjustment rings.
7. Replace manhole cover over manhole frame rim.
END OF SECTION
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(NO TEXT FOR THIS PAGE)
Sewer Inspection/Cleaning 02652-1 10/2017
SECTION 02652
SEWER MANHOLE INSPECTION
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes: Above-ground inspection, evaluation, and condition assessment
of sewer manholes. It also includes work necessary to make manholes easy to
locate and access. Work may include raising paved over or buried manholes and
replacing manhole frames and covers for inspection.
B. Related Work Specified in Other Sections Include, But is Not Limited to, the
Following:
1. Section 02150 - Bypass Pumping
2. Section 02651 - Television Inspection
3. Section 02653 - Sewer Smoke Testing
4. Section 02654 - Sewer Dyed-Water Testing
5. Section 02760 - Cleaning of Sewers
1.2 REFERENCE
A. Codes and standards referred to in this Section are:
1. National Association of Sewer Service Companies (NASSCO) Manhole
Assessment and Certification Program©.
2. NASSCO Manual of Practice, Latest Edition.
3. Virginia Occupational Safety and Health (VOSH) Compliance Program.
4. ASCE Manhole Inspection & Rehabilitation Manual of Practice No. 92, 1997.
1.3 DEFINITIONS
A. Manhole Inspection: It is the intent of this specification to provide above-ground
manhole inspections, CONTRACTOR may enter manhole if necessary to field
verify any conditions or finding(s), if deemed necessary. Manhole inspection
includes data collection using a telescoping video camera or LIDAR/laser scanner,
still photos or laser scans of critical defects, and condition assessment evaluation
and report. Above-ground inspections must also provide for inspection of
connecting sewer main pipes for critical defects.
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1.4 PERFORMANCE REQUIREMENTS
1. Sewer manhole inspection shall be performed by personnel trained and
certified in the use of NASSCO’s Manhole Assessment and Certification
Program© (MACP). Contractor shall submit PACP/MACP training
certificates of all personnel doing the work, to the OWNER
2. CONTRACT work requires work in active sewer manholes. Follow all
federal, state, and local requirements for safety in confined spaces. Conform
to all guidelines set forth by VOSH Compliance Program. CONTRACTOR is
solely responsible for safety during the performance of all work.
3. CONTRACTOR is responsible for any damage to public or private property
resulting from sewer manhole inspection activities and shall repair or
otherwise make whole such damage at no cost to the OWNER.
4. Provide all necessary equipment.
1.5 SUBMITTALS
A. General: Provide all submittals, including the following, as specified in
Division 1.
B. Submit sample inspection forms, photographs, video, and laser scanned point
clouds from three recent manhole inspection projects of a similar nature.
C. Submit the equipment manufacturer’s operational manual and guidelines to the
OWNER for review. Strictly follow such instructions unless modified by the
OWNER.
D. Submit inspection forms and digital videos on USB flash drives to the OWNER
for review. Contractor shall provide videos, laser scan data, photos and inspection
reports on external hard drive(s) if requested by the OWNER.
1. Provide inspection data on flash drives and hard drive(s) of a quality sufficient
for the OWNER to evaluate the condition of the manhole and locate the
service connections. If quality is not sufficient, CONTRACTOR shall re-
inspect the manhole and provide inspection reports and videos at no additional
cost to the OWNER. Camera distortions, inadequate lighting, dirty lens, or
blurred/hazy picture will be cause for rejection of videos and rejection of the
associated manhole inspection.
a. CONTRACTOR to submit the initial inspection report and video to the
OWNER for review of data quality before all inspections are completed.
OWNER acceptance of initial report and data does not prevent future
rejection of any of the remaining inspections.
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2. USB falsh drives and hard drive(s) submitted become the property of the
OWNER.
E. Maintain a master copy of all inspection reports, and videos submitted until final
acceptance of the contract and through warranty period.
1.6 QUALITY ASSURANCE
A. Perform work in accordance with the best practice of the industry. The
specifications call attention to the features but do not purport to cover all details
entering into the required work.
B. Experience Requirements:
1. A minimum of 3 years of experience in manhole inspection using telescoping
camera equipment and LIDAR technology is required. Furnish documentation
of experience to OWNER upon request.
C. Maintain on site at all times a competent field supervisor in charge of the
inspection. The field supervisor shall be approved in writing by the ENGINEER
prior to commencement of work. Any change in supervision must also be
approved in writing by the ENGINEER prior to the change.
1.7 PROJECT CONDITIONS
A. Manholes Containing Mechanical or Electrical Equipment:
1. Drawings may not show locations of flow monitoring equipment. If a
manhole contains any mechanical hardware or electrical flow monitoring
equipment, do not proceed with the scheduled work and notify the OWNER.
2. Reschedule work in such manholes until equipment has been removed by the
OWNER and further instructions are given.
3. Do not bypass manholes with mechanical hardware or electrical equipment
unless approved by the OWNER.
4. Damage to installed equipment, due to CONTRACTOR’s failure to adhere to
the above, will be repaired by the OWNER at the CONTRACTOR’s expense.
B. Field Location of Manholes, Cleanouts and End of Lines:
1. Be responsible for locating and uncovering all manholes, cleanouts and end of
lines. If CONTRACTOR is unable to locate manhole, cleanout or end of line,
notify OWNER in writing. Raise manhole frames if required.
2. Confirm the manhole number and location before starting work.
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1.8 SALVAGE
A. Manhole covers and frames, from abandoned manholes remain the property of the
OWNER. Deliver salvaged items to locations designated by OWNER.
PART 2 PRODUCTS
A. Inspection Devices
1. Camera
a. Camera shall have both video and photograph capabilities.
b. Camera shall digital and capable of producing photographs with a
minimum resolution of 5.0 megapixels and shall be equipped with a
flash.
c. Camera shall be capable of zooming 12X for digital viewing.
d. Camera shall be able to be connected to a telescoping lowering mast for
360 degree above-ground manhole inspection.
e. Camera shall be capable of being operated remotely from an inspection
unit.
f. Adequate camera lighting shall be provided.
g. Video inspection data acquisition software: Select and use inspection
acquisition software capable of generating printed reports to submit to
the OWNER on hard copy and on digital media.
(1) Use inspection acquisition software that is NASSCO Manhole
Assessment and Certification Program© certified.
(2) Acquisition software must be compatible with City GIS
database.
2. Laser Scanner
a. Laser Scanner shall be capable of producing a 360-degree 3-
Dimensional scan of the entire manhole. The laser scanner shall also take
pictures of the manhole being scanned such that the 3-Dimensional data
and pictures can be composited and viewed together on a computer using
the Trimble RealWorks Viewer.
Sewer Inspection/Cleaning 02652-5 10/2017
b. Laser Scanner shall be capable of sampling at least 100,000 points per
second.
c. Laser Scanner shall use a Class 1 “eye safe” laser or similar laser that
does not constitute a health risk to those exposed to the laser.
d. Laser Scanner shall have a range of at least 0.6 to 300 meters.
e. The ranging error at 10 meters must be within 3mm.
f. Laser Scanner shall have been inspected and calibrated by the equipment
manufacturer within the last 12 months. Evidence of this calibration and
appropriate functioning of the Laser Scanner must be made available to
the engineer upon request.
3. LIDAR Scanner
a. LIDAR Scanner shall be capable of producing a 360-degree 3-
Dimensional scan of the entire manhole. The LIDAR scanner shall also
take pictures of the manhole being scanned such that the 3-Dimensional
data and pictures can be composited and viewed together on a computer
using the Trimble RealWorks Viewer software.
b. LIDAR Scanner shall have a range of at least 2 to 1000 feet for 90%
Reflectivity (white) and 2 to 160 feet for 2% Reflectivity (black).
c. LIDAR Scanner shall have a measurement speed up to 976,000 points
per second.
d. LIDAR Scanner shall have an integrated color unit with a resolution up
to 165 megapixel.
e. The laser optical transmitter shall be Laser Class1 with a wavelength of
1550 nm.
f. LIDAR Scanner shall have an integrated sensor with dual axis
compensator which is capable of performing a leveling of each scan with
an accuracy of 19 arcsec valid within ±2 degree.
g. LIDAR Scanner shall have a height sensor to detect the height relative to
a fixed point via an electronic barometer and add to a scan.
h. LIDAR Scanner shall have electronic compass to give the scan an
orientation.
i. LIDAR Scanner shall have integrated GPS and GLONASS.
Sewer Inspection/Cleaning 02652-6 10/2017
B. When using survey rods or tape measures for linear measurements, the
measurements shall be accurate to one inch.
C. Manhole Frames and Covers
a. Acceptable manufacturers for manhole metal frames and covers are
listed below. Other manufacturers of equivalent products may be
submitted.
(1) Neenah Foundry
PART 3 EXECUTION
3.1 PREPARATION
A. Notification: Notify the OWNER at least 24 hours in advance of any manhole
inspection so that the OWNER may observe the inspection operations if so
desired.
3.2 TRAFFIC CONTROL
A. Provide barricades, flaggers, and other traffic control devices as necessary in work
areas and around open manholes. Maintain traffic at all times with minimal
disruption to residents and businesses.
3.3 FLOW CONTROL:
A. Adequately control flow in the manhole being inspected. The depth of flow in the
manhole should not exceed the height of the bench. If during inspection, the
wastewater flow depth exceeds the allowable amount, reduce the flow depth to an
acceptable level by performing the inspection during minimum flow hours, by
diversion pumping, or by some other dewatering device. Divert flow in
accordance with Section 02150 – Bypass Pumping. Should a surcharge condition
be discovered, notify the OWNER immediately.
3.4 MANHOLE CLEANING
A. Sewer manhole shall be cleaned only if necessary to provided unobstructed views
of bench, channel, connecting sewers, and any other manhole component.
Disposal of material removed during cleaning shall conform to the disposal
requirements specified in Section 02760 – Cleaning of Sewers
Sewer Inspection/Cleaning 02652-7 10/2017
3.5 SEWER MANHOLE INSPECTION
A. Inspection of Manhole Structure: Inspect and document the location, type of
material, conditions, defects, and observations of manholes using the Manhole
Inspection Form, located in EXHIBIT C of this CONTRACT or an equivalent
MACP compliant MH Inspection form approved by the OWNER.
B. Manhole Condition Ratings: Each Manhole Inspection Form shall provide
condition ratings for each sewer manhole component (cover, frame, chimney,
cone, wall, bench, channel etc). Use the condition rating system next to the each
manhole component on the Manhole Inspection Form, located in Exhibit C of this
CONTRACT or an equivalent MACP condition rating system to assign and record
condition ratings.
C. Infiltration and Inflow (I/I): Each Manhole Inspection Form shall provide I/I
ratings for each sewer manhole component. Use the rating system on Page 2
under Evidence of Leakage section of the Manhole Inspection Form, located in
Exhibit C of this Contract or an equivalent MACP rating system to assign and
record I/I ratings.
D. Roots: Each Manhole Inspection Form shall provide information on type of roots
for each sewer manhole component. Use the rating system on Page 2 under
Evidence of Roots section of the Manhole Inspection Form, located in Exhibit C
of this Contract, to assign and record type of roots.
E. Inspection of Service Connections: Service connections shall be inspected by use
of the inspection camera. Focus of inspection shall include the connection of the
sewer main and lamping inspection up sewer pipe, recording all defects found in
the service connection. Flows from the service connections shall be observed for
approximately two minutes to ascertain if the flow is sanitary or extraneous flow.
The video recording may be paused during observation. Results of the pipe
investigation and flow observation shall be recorded on Page 2 of the Manhole
Inspection Form located in EXHIBIT C of this CONTRACT. Each service
connection shall be photographed using the zooming capability of the digital
camera for approximately 40 linear feet of sewer pipe. Take enough photographs
to cover the entire circumference of the pipe.
F. LIDAR/Laser Scanner Manhole Inspection
1. Each manhole shall be inspected with at least 4 sets of 360-degree scans, taken
throughout the height of the manhole. The first scan must show the top of the
manhole and the surrounding area above grade as well as the upper portion of
the manhole. This scan may include marks or other details that allow the 3D
point cloud data to be oriented correctly.
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2. Additional 360-degree scans must be taken at each elevation where there is an
influent pipe. These scans must allow the dimensions and interior condition of
each influent pipe to be determined.
3. These laser scans must be taken in such a way that all of the 3D point cloud
data can be stitched together, resulting in a single file of 3D data that shows
the entire structure as well as the the influent and effluent pipes.
G. LIDAR Scanner Limitations: The LIDAR scanner limitations for manhole
inspection are as follows:
1. Manhole depth - not greater than 50 feet
2. Flow in manhole - cannot have any running water coming from above the
scanner from a lateral or pipe that could fall onto scanner
3. Severe offset in manhole
4. Surcharged manhole
H. Raising Buried Manholes: If, in the progress of the Work, it is found that some
manhole covers are buried beneath the pavement, notify the OWNER. If the
OWNER determines that access through the manholes is vital to the Work, expose
the cover and reset the frame so that the cover is flush with the pavement. Restore
the pavement surrounding the manhole to match the existing pavement. Perform
pavement restoration in accordance with Section 02513 – Restoration of
Pavement. Replace manhole frame and cover if required. Such work will be
reimbursed by the Contract Items 45, 46 and 47 for manhole frame and cover
replacement and manhole risers, respectively.
3.6 MANHOLE FRAME AND COVER REPLACEMENT
A. Installation:
1. Remove cover and existing paving adjustment rings and clear manhole
frame rim of any loose material and debris.
2. Excavate existing pavement or unpaved area to expose existing frame and
top of manhole chimney.
3. Remove existing frame and any loose material and debris from top of
manhole chimney.
4. In paved areas, combine precast concrete adjustment rings so that the top of
the installed casting shall match finished grade.
5. In unpaved and grassy areas, combine precast concrete adjustment rings so
that the top of the installed casting extends at least 6 inch above finish grade.
Gradually slope the surface up to top of casting and surface graded to
provide positive drainage away from manhole.
Sewer Inspection/Cleaning 02652-9 10/2017
6. Apply an approved sealant between the top adjustment ring and the manhole
frame. Apply no less than two beads ½-inch wide and ¾-inch high. Apply
an approved manhole cementitious lining material between the rings and no
less than 1 inch of lining material to the inside and outside face of the
adjustment rings.
7. Replace manhole cover over manhole frame rim.
3.7 DOCUMENTATION AND INSPECTION REPORT
A. For each sewer manhole inspection, provide:
1. The completed Manhole Inspection Form, Page 1 and Page 2, located in
EXHIBIT C of this CONTRACT or a completed equivalent form that was
previously approved by the OWNER. Provide a hard copy and a Microsoft
PC digital copy.
2. A Video Inspection Report generated by the video inspection acquisition
software that clearly identifies the location of defects and observations
indexed on the Manhole Inspection Form, located in EXHIBIT C of this
CONTRACT. Contact the OWNER for format requirements
3. Either the Video Inspection Data or the LIDRA/Laser Scanner Data,
depending on the type of inspection conducted.
4. Video Inspection Data
a. MPEG Video: Each Video Inspection Report shall provide a link to the
MPEG video for each defect and observation surveyed during the
pipeline inspection. Videos must play via standard MPEG-ready
software, requiring no proprietary software.
(1) The digital recording shall be free of electrical interference and
shall produce a clear and stable image.
(2) The digital recording shall include a visual noting:
(a) Date and time of day;
(b) Manhole number. Manhole numbers shall be designated
by OWNER.
b. USB flash drives must be readable. Unreadable/corrupted flash drives
will be returned and new ones provided at no cost to the OWNER.
Compile sewer manhole inspections onto an external hard drive(s) at end
of project and provide to the OWNER if requested by the OWNER.
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c. USB Flash Drive and External Hard Drive Label: Place a tag with a
typed label on the USB flash drive. For external hard drive, attach a
typed label on the face of the hard drive. The label shall include the
following information:
(1) Assignment Number
(2) Contractor’s Name
(3) Inspection Type: Survey, Pre-Installation, Post-Installation
(4) Inspection Date(s)
(5) Date Submitted
(6) Basin Number
(7) Street Name
(8) Inspected Manhole Numbers
d. JPEG Images: Each inspection report shall provide JPEG images of
defects and observations surveyed during video inspections. JPEG
images shall be linked to Video Inspection Report for viewing and
printing. JPEG images shall be referenced on the Manhole Inspection
Form located in EXHIBIT C of this CONTRACT.
5. LIDAR/Laser Scanner Data
a. LIDAR/Laser Scanner 3D Data and Photographs: Provide combined 3D
and photogrammetric data that has been cleaned and edited and is ready
for Engineer’s review. Data shall be provided in a format compatible
with “Trimble RealWorks Viewer” software.
(1) The data shall be free of extraneous noise and shall produce a
clear and stable image. The data shall be a single, complete, 3D
point cloud that shows the entire structure.
(2) Do not provide raw data that has not been reviewed and edited
for correctness.
(3) The data shall include appropriately placed dimensions that
identify the size of the structure and all influent and effluent
pipes.
(4) The 3D point cloud layers and features shall be named
appropriately with the correct manhole, pipe, or feature name.
b. USB flash drives must be readable. Unreadable/corrupted flash drives
will be returned and new ones provided at no cost to the OWNER.
Compile sewer manhole inspections onto an external hard drive(s) at end
of project and provide to the OWNER if requested by the OWNER.
Sewer Inspection/Cleaning 02652-11 10/2017
c. USB Flash Drive and External Hard Drive Label: Place a tag with a
typed label on the USB flash drive. For external hard drive, attach a
typed label on the face of the hard drive. The label shall include the
following information:
(1) Assignment Number
(2) Contractor’s Name
(3) Inspection Type: Survey, Pre-Installation, Post-Installation
(4) Inspection Date(s)
(5) Date Submitted
(6) Basin Number
(7) Street Name
(8) Inspected Manhole Numbers
d. Figures and Images: Each inspection report shall provide JPEG or PDF
images of defects and observations surveyed during inspections. Images
shall be referenced on the Manhole Inspection Form located in EXHIBIT
C of this CONTRACT. Other images or figures that must be included
are:
(1) A figure that schematically shows, in plan-view, all influent
and effluent pipes for the manhole. Label pipes, pipe diameters
if possible, and provide a north arrow for orientation.
(2) A plan-view image showing the manhole from grade to the
bottom of the structure comprised of the composited 3D scan
information.
(3) Images showing cross sections of the structure. Create a cross
section looking downstream of each pipe that enters or exits the
manhole. These images should be labeled with pipe names,
pipe dimensions, manhole structure dimensions, and elevations.
END OF SECTION
Sewer Inspection/Cleaning 02652-12 10/2017
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Sewer Inspection/Cleaning 02653-1 10/2017
SECTION 02653
SEWER SMOKE TESTING
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes: Requirements for providing sewer smoke testing services to
determine sources of inflow in the sewer. Results are used to determine where
further inspection, such as dyed-water testing, manhole inspection, and CCTV
inspection, may be required and to assist in determining and prioritizing
rehabilitation needs.
B. Related Work Specified in Other Sections Include, But is Not Limited to, the
Following:
1. Section 02150 - Bypass Pumping
2. Section 02651 - Television Inspection
3. Section 02652 - Manhole Inspection
4. Section 02654 - Sewer Dyed-Water Testing
1.2 REFERENCE
A. Codes and standards referred to in this Section are:
1. National Association of Sewer Service Companies (NASSCO) Manhole
Assessment and Certification Program©.
2. NASSCO Inspector’s Handbook, Latest Edition.
3. Virginia Occupational Safety and Health (VOSH) Compliance Program.
1.3 DEFINITIONS
A. Smoke Testing: Smoke testing is the process of using low pressure smoke in
sewer systems to locate sources of rain-fall and snow-melt dependent inflow into
the sewer.
B. Sources of Inflow: Sources of inflow may include downspouts, sump pumps,
clean-outs, yard drains, stairwell, driveway, and foundation drains, catch basins,
and interconnections between storm and sanitary sewers. In some cases, broken
piping and covered manhole lids or clean-out caps may be encountered.
C. Finding: A finding is a source of inflow that has been found during smoke testing.
Sewer Inspection/Cleaning 02653-2 10/2017
1.4 PERFORMANCE REQUIREMENTS:
A. Contract work requires work in active sewer manholes. Follow all federal, state,
and local requirements for safety in confined spaces. Conform to all guidelines set
forth by VOSH Compliance Program. The contractor is solely responsible for
safety during the performance of all work
B. The CONTRACTOR is responsible for any damage to public or private property
resulting from sewer smoke testing activities and shall repair or otherwise make
whole such damage at no cost to the OWNER.
C. Provide all necessary equipment.
1.5 SUBMITTALS
A. General: Provide all submittals, including the following, as specified in Division
1.
B. Submit sample inspection reports from three recent smoke testing projects of a
similar nature to the OWNER, prior to commencement of the work.
C. Submit the initial testing report with photographs to the OWNER for review of
quality before all testing is completed. OWNER acceptance of initial report and
photographs quality does not prevent future rejection of any of the remaining tests.
D. Maintain a master copy of all testing reports and photographs submitted until final
acceptance of the contract and through warranty period.
1.6 QUALITY ASSURANCE
A. Perform in accordance with the best practice of the industry. The specifications
call attention to the features but not purport to cover all details entering into the
required work.
B. Experience Requirements:
1. A minimum of 3 years of experience with smoke testing sewers is required.
Furnish documentation of experience to OWNER upon request.
C. Maintain on site at all times a competent field supervisor in charge of the testing.
The field supervisor shall be approved in writing by the ENGINEER prior to
commencement of work. Any change in supervision must also be approved in
writing by the ENGINEER prior to the change.
Sewer Inspection/Cleaning 02653-3 10/2017
PART 2 PRODUCTS
2.1 SMOKE SOURCE
A. Smoke source may be smoke candles or liquid smoke capable of producing not
less than 25,000 cubic feet of smoke in three minutes. Duration of recommended
smoke candles is typically 3 to 5 minutes.
B. Smoke must be non-toxic, non-explosive, odorless, and non-staining.
C. Smoke may be added to a manhole after the test has begun if it is determined that
additional smoke is needed.
2.2 SMOKE BLOWER
A. Smoke blower shall have a capacity of at least 1700 cfm.
B. Smoke blower should be fitted over manhole with a gasket device to maximize the
amount of smoke entering the sewer.
PART 3 EXECUTION
3.1 COORDINATION AND NOTIFICATION
A. Coordinate and schedule testing dates, times, and location with fire and police
departments, OWNER and any other affected utilities or agencies within at least 2
weeks in advance of the testing. Notify and advise on a daily and street-to-street
basis during the testing.
B. Notify all property owners who may be affected by the testing within one week of
testing and all property owners who are connected to the test segment, at least 3
days prior to testing.
1. Notification can be achieved via mailings, phone calls, and door hangers.
Please see “Sample Notification Letter” in Exhibit X of this CONTRACT.
2. In the notification letter and reminders, advise property owner(s) to run
water into all household drain traps prior to the testing.
3. Notify property owners(s) that smoke may escape through sewer vents (i.e.
roof vents), dry traps which have not had water placed in them, and
defective house piping.
C. Where access to manholes in easements and rights-of-way is required, the
CONTRACTOR will obtain permission for access for his equipment.
Sewer Inspection/Cleaning 02653-4 10/2017
D. Barricades and warning signs shall be used in work areas and around open
manholes. The CONTRACTOR shall furnish and maintain traffic controls and
safety devices as required.
E. If, in the progress of the work, it is found that some manhole covers are buried
beneath the pavement, the OWNER shall be notified. If the OWNER determines
that access through the manholes is vital to the work, the cover shall be exposed
and the frame shall be reset so that the cover is flush with the pavement. The
pavement surrounding the manhole shall be restored to match the existing
pavement. Such work will be reimbursed by the unit bid item for manhole frame
and cover replacement.
3.2 TRAFFIC CONTROL
A. Provide barricades, flaggers, and other traffic control devices as necessary in work
areas and around open manholes. Maintain traffic at all times with minimal
disruption to residents and businesses.
3.3 PROCEDURES
A. Smoke testing should not be performed when the ground is saturated, frozen, or
snow-packed, or when the pipe is flowing full, or during rainy or windy days.
Smoke testing should be performed at least one week after a precipitation event
unless authorized differently by OWNER.
B. Test one sewer segment at one time, from manhole to manhole. Perform the test
(i.e. locate smoke supply and blower) at the upstream manhole of the pipe segment
being tested.
C. Flow Control: Control flow in sewers as needed to permit the work to be
accomplished, by use of plugs, sandbags, flow restrictor, pump bypasses, or other
means. Divert flow in accordance with Section 21150 – Bypass Pumping.
D. Testing: Smoke shall be supplied at a pressure of not less than 1.0 psi.
E. Digital Photos: Document all potential inflow sources (i.e. smoking sites) with a
digital photograph. Photographs shall be provided in JPEG format.
F. Testing shall be ceased and pipe segment vented at the first indication of smoke
inside any building or residence.
3.4 DOCUMENTATION AND TESTING REPORT
A. Testing report: For each affected property, document and record the following
items on the Smoke Testing Form located in EXHIBIT D of this CONTRACT. An
affected property is where one or more findings are identified.
Sewer Inspection/Cleaning 02653-5 10/2017
1. Date and time of testing.
2. Name(s) of personnel/crew performing the testing.
3. Basin identification.
4. Street name and name of nearest intersection, for tested segment(s).
5. Identification of the manhole where testing is began, where the smoke the
bomb is placed.
6. Identification of tested pipe segment(s) in relation to connecting manholes.
7. Approximate length (feet) of sewer being tested.
8. Address of affected property.
9. Findings:
a. Location of findings (smoke leaks and illicit connections). In the case
of downspouts and sump pumps, CONTRACTOR is to provide
name(s) of property owner(s) and exact address of residence or
building.
b. Description of finding(s)
c. Provide type of surface cover and approximate drainage area.
d. Estimated rate of smoke coming out of the source finding (low,
medium, high based on experience).
e. Recommendation on how to remove or more accurately identify the
inflow source.
f. Mark location of finding (leaks and illicit connections) on GIS map of
the collection system. GIS map of collection system to be provided
by OWNER.
g. Number or label findings in format acceptable to OWNER.
10. Provide hard copy and digital copy of completed inspection form to
OWNER. Digital copy is to be Microsoft PC compatible.
11. Attach digital photographs (in JPEG format) of findings to the report.
Provide hard and digital copies of photographs. The hard copy of the
Sewer Inspection/Cleaning 02653-6 10/2017
photograph shall be a minimum of 4” by 6”. Label each photograph with
the following items:
a. Date and time of testing.
b. Location of finding – address or name of nearest intersection.
c. Identification of the manhole where testing is began, where the smoke
the bomb is placed.
B. If no properties are affected and no finding(s) are identified during the test, fill out
one Smoke Test Form and fill in items 1-7 below:
1. Date and time of testing.
2. Name(s) of personnel/crew performing the testing.
3. Basin identification.
4. Street name and name of nearest intersection, for tested segment(s).
5. Identification of the manhole where testing is began, where the smoke the
bomb is placed.
6. Identification of tested pipe segment(s) in relation to connecting manholes.
7. Approximate length (feet) of sewer being tested.
END OF SECTION
Sewer Inspection/Cleaning 02654-1 10/2017
SECTION 02654
SEWER DYED-WATER TESTING
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes: Requirements for providing sewer dyed-water testing and
flooded sewer dyed-water testing services to determine sources of infiltration and
inflow into the sewer. Results are used to determine where further inspection,
such as CCTV and/or manhole inspection, may be required and to assist in
determining and prioritizing rehabilitation needs.
B. Related Work Specified in Other Sections Include, But is Not Limited to, the
Following:
1. Section 02651 - Television Inspection
2. Section 02652 - Manhole Inspection
1.2 REFERENCE
A. Codes and standards referred to in this Section are:
1. Water Environment Federation (WEF) Manual of Practice FD-6, 1994.
2. Virginia Occupational Safety and Health (VOSH).
1.3 DEFINITIONS
A. Dyed-Water Testing: Dyed-water testing is used to verify inflow sources. It can
also be used to detect infiltration sources from other crossing pipelines, stream
sections, and ditch sections.
B. Sources of Infiltration and Inflow (I/I): Sources of inflow and infiltration may
include defects in the pipe, pipe joints, manholes, and clean-outs, as well as illicit
connections to the sewer system such as downspouts, sump pumps, yard drains,
stairwell, driveway, and foundation drains, catch basins, interconnections between
storm and sanitary sewer systems, and other unauthorized connections.
C. Finding: A finding is a source of I/I that has been found during dye testing.
Sewer Inspection/Cleaning 02654-2 10/2017
1.4 SUBMITTALS
A. General: Provide all submittals, including the following, as specified in Division
1.
B. Submit sample test reports from three recent dyed-water testing projects of a
similar nature.
C. Submit the initial testing report with photographs to the OWNER for review of
quality before all testing is completed. OWNER acceptance of initial testing report
and photographs quality does not prevent future rejection of any of the remaining
tests.
D. Maintain a master copy of all testing reports and photographs submitted until final
acceptance of the contract and through warranty period.
1.5 PERFORMANCE REQUIREMENTS
1. CONTRACT work requires work in active sewer manholes. Follow all
federal, state, and local requirements for safety in confined spaces. Conform
to all guidelines set forth by VOSH Compliance Program. The
CONTRACTOR is solely responsible for safety during the performance of
all work.
2. The CONTRACTOR is responsible for any damage to public or private
property resulting from sewer-dyed water testing activities and shall repair
or otherwise make whole such damage at no cost to the OWNER.
3. Provide all necessary equipment.
1.6 QUALITY ASSURANCE
A. Perform work in accordance with the best practice of the industry. The
specifications call attention to the features but not purport to cover all details
entering into the required work.
B. Experience Requirements:
1. A minimum of 3 years of experience with dyed-water testing in sewers is
required. Furnish documentation of experience to OWNER upon request.
C. Maintain on site at all times a competent field supervisor in charge of the testing.
The field supervisor shall be approved in writing by the ENGINEER prior to
commencement of work. Any change in supervision must also be approved in
writing by the ENGINEER prior to the change.
Sewer Inspection/Cleaning 02654-3 10/2017
PART 2 PRODUCTS
2.1 EQUIPMENT
A. Fluorescent Dye
1. Dye may be in tablet, liquid, or powder form.
2. Use dye that is safe to handle, biodegradable and inert to the soil and debris
in sewers. Use dye that is green in color.
3. Dye may be added after the test has begun if it is determined that additional
dye is needed. The darker the water, the more dye will be needed to be
added. Dye manufacturer’s guidelines must be followed.
PART 3 EXECUTION
3.1 COORDINATION AND NOTIFICATION
A. Coordinate and schedule testing dates, times, and location with fire and police
departments, OWNER and any other affected utilities or agencies within at least 2
weeks in advance of the testing. Notify and advise on a daily and street-to-street
basis during the testing.
B. Notify property owner(s) within one week of testing and at least 3 days prior to
testing.
1. Notification can be achieved via mailings, phone calls, and door hangers.
C. Where access to manholes in easements and rights-of-way is required, the
CONTRACTOR will obtain permission for access for equipment.
D. Barricades and warning signs shall be used in work areas and around open
manholes. The CONTRACTOR shall furnish and maintain traffic controls and
safety devices as required.
E. If, in the progress of the work, it is found that some manhole covers are buried
beneath the pavement, the OWNER shall be notified. If the OWNER determines
that access through the manholes is vital to the work, the cover shall be exposed
and the frame shall be reset so that the cover is flush with the pavement. The
pavement surrounding the manhole shall be restored to match the existing
pavement. Such work will be reimbursed by the unit bid item for manhole frame
and cover replacement.
Sewer Inspection/Cleaning 02654-4 10/2017
3.2 TRAFFIC CONTROL
A. Provide barricades, flaggers, and other traffic control devices as necessary in work
areas and around open manholes. Maintain traffic at all times with minimal
disruption to residents and businesses.
3.3 FLOW CONDITIONS
A. Perform sewer dyed- water tests under low flow conditions. The depth of flow in
the manhole should not exceed the height of the bench.
3.4 PROCEDURES
A. If testing a direct connection, such as a downspout or a storm inlet, add dye to the
suspected inflow/infiltration source connection. Add water as necessary.
B. If performing flooded dyed-water testing for storm sewers that are parallel or that
cross sanitary sewers and that have been determined to be leaking during smoke
testing, plug and flood the storm sewers prior to adding dye. Flooded dyed-water
testing can also be used in ditches and other low-lying areas adjacent to sanitary
sewers that have been previously determined to be leaking with smoke testing.
C. Dye testing should not be performed under high flow conditions, when the ground
is saturated, frozen, or snow-packed.
D. Digital Photos: Document all verified inflow sources with a digital photograph.
Photographs shall be provided in JPEG format.
E. CCTV of piping and/or manhole inspection may be necessary to verify findings
from dyed-water testing.
3.5 DOCUMENTATION AND TESTING REPORT
A. Testing report: Document and record the following items on the Sewer Dyed-
Water Testing Form located in EXHIBIT E of this CONTRACT.
1. Date and time of testing.
2. Name(s) of personnel/crew performing the testing.
3. Basin identification.
4. Lot and Block Number.
5. Type of property.
6. Address of Dye Introduction Location.
Sewer Inspection/Cleaning 02654-5 10/2017
7. Name and phone number of property owner.
8. Identification of the location where testing is began.
9. Identification of Location(s) of Positive Dye Transfer Finding(s).
a. Provide type of surface cover and approximate drainage area.
b. Provide recommendation on how to remove or more accurately
identify the inflow source.
c. Mark location of finding on GIS map of the collection system. GIS
map of collection system to be provided by OWNER.
d. Number or label findings in format acceptable to OWNER.
e. Provide estimates of flow rate for each finding (inflow source)
according to following table:
Type of Inflow Sources Estimated Inflow Rate (gpm)
Downspout 10
Area Drain 20
Driveway Drain 15
Foundation Drain 5
Sump Pump 5
Catch Basin 100Table adapted from the Commonwealth of Massachusetts, Department of Environmental Protection.
10. Provide hard copy and digital copy of completed Dyed-Water Testing Form
to the OWNER. Digital copy is to be Microsoft PC compatible.
11. Attach digital photographs of findings to the report. Provide photographs in
JPEG format. Provide hard and digital copies of photographs. The hard
copy of the photograph shall be a minimum of 4” by 6”. Label each
photograph with the following items:
a. Date and time of testing.
b. Address of Dye Introduction Location.
c. Positive Dye Transfer Observation Location.
END OF SECTION
Sewer Inspection/Cleaning 02654-6 10/2017
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Sewer Inspection/Cleaning 02655-1 10/2017
SECTION 02655
SEWER LASER PROFILING AND 3D LASER SCANNING
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes: Laser Profiling and 3D Laser Scanning of underground mainline
pipes to allow for accurate determination of internal pipeline conditions prior to
and/or after rehabilitation (lining), pipeline geometry above fluid level and
quantitative information regarding internal pipe diameter, including ovality. Laser
Profiling /Scanning shall be carried out simultaneously with Television Inspection
as specified in Section 02651. 3D Laser Scanning shall be used for pipe sizes equal
to or greater than 48” in diameter and shall provide an accurate determination of
pipe geometry above the fluid level. Internal diameter and deflection graphs will
be used in conjunction with the integrated and detailed views to precisely quantify
internal pipe wall material loss/gain or deformation at a given payout location and
clocking angle. Pipe cross-sections obtained from precision high resolution scans
will be used to provide quantitative information regarding internal pipe diameter,
including ovality. Precision scans are produced with multi-color indication
depicting deviations from as-built conditions as well as localized material gain
and/or loss.
B. Related Work Specified in Other Sections Include:
1. Section 02150 - Bypass Pumping
2. Section 02651 - Television Inspection
3. Section 02760 - Cleaning of Sewers
1.2 REFERENCES
A. Codes and standards referred to in this Section are:
1. National Association of Sewer Service Companies (NASSCO), Pipeline
Assessment and Certification Program©.
2. Virginia Occupational Safety and Health (VOSH) Compliance Program.
3. ASTM F 1216 - Standard Practice for Rehabilitation of Existing Pipelines
and Conduits by the Inversion and Curing of a Resin-Impregnated Tube
Sewer Inspection/Cleaning 02655-2 10/2017
1.3 DEFINITIONS
A. Laser Profiling: Laser Profiling is a technique to determine the surface profile of
mainline pipes less than 48” diameter through laser scanning using a laser profiler
attached to the CCTV inspection equipment.
B. 3D Laser Scanning: 3D Laser Scanning is a technique to determine the surface
profile of mainline pipes for pipe sizes equal to or greater than 48” in diameter
through laser scanning using a 3D spinning laser attached to the CCTV inspection
equipment.
1.4 SYSTEM DESCRIPTION
A. Performance Requirements for Laser Profiling in pipes less than 48” in diameter:
1. Perform Laser Profiling using personnel trained and certified in the use of
NASSCO’s Pipeline Assessment and Certification Program© (PACP).
Contractor shall submit PACP training certificates of all personnel doing the
work, to the OWNER. Survey records are to conform to the latest NASSCO
PACP codification.
2. Be aware that this Contract requires work in active sanitary and storm
sewers, and follow all federal, state, and local requirements for safety in
confined spaces. Conform to all guidelines set forth by VOSH Compliance
Program and be solely responsible for safety during performance of all
Work.
3. Be responsible for any damage to public or private property resulting from
the laser profiling activities, and repair or otherwise make whole such
damage at no cost to OWNER.
4. Provide all necessary equipment:
a. Laser Profiler: Select a laser profiler that is a stand-alone snap on
tool which can be used with the CCTV inspection equipment and
camera to collect survey data and create pipeline reports containing
the measurement of defects and other features inside the pipeline. Use
a laser profiler that attaches to a CCTV camera and is battery powered
(rechargeable). The profiler shall be capable of measuring the
distances to objects and surfaces in pipes, and shall be capable of
imaging pipe sizes ranging from 12” through 47”. The laser profiler
shall provide measurements of pipe size, laterals, water levels, faults
and other features, as well as quantitative information regarding
internal pipe diameter, including ovality and capacity.
b. Laser Heads: Select and use a laser profiler system that is available
with different sizes of laser heads for different diameter of pipes.
Sewer Inspection/Cleaning 02655-3 10/2017
c. Mounting Assembly: Provide a snap-on camera mounting fixture or a
skid type mount and transport assembly for inspection of pipes to
insure maximum stabilization of the projected laser ring within the
pipe being inspected. The mounting assembly shall allow for
simultaneous CCTV inspection and profiling, shall be capable of
forward/ stop/backward mobility for detailed high resolution laser
scans and also be able to support the laser/ camera equipment above
the water level.
d. Profiler Software:
(1) The Standard Measurement Software (SMS) shall be designed for
installation on a standard windows based computer (Laptop or
Desktop).
(2) Shall be able to measure minimum and maximum pipe size, ovality
deformation, X-Y axis measurement, and capacity reduction and
shall be able to generate visual and hard copy reports.
(3) Post-processed data shall include the capability of measuring any
two points within the displayed video or digital images.
(4) Shall be able to generate visual and hard copy reports of 3
dimensional images as well as a flat display of pipe conditions by
percentage color adjustment for the quick analysis of pipeline
problems and defects.
(5) Hard copy reports shall be available in PDF format.
(6) Shall be able to accurately measure cracks, joints, bulges, dimples,
and bubbles in CIPP or other relined pipe when combined with a
camera equipped with calibration spot lasers.
(7) Shall be designed to project a laser light in a radial plane
perpendicular to the CCTV camera’s line of sight and create a 360
degree red line (circle) on the inside wall of the pipe.
(8) Shall include a calibration target to calibrate and verify proof of
calibration for every inspected pipe segment.
(9) Shall correct for barrel distortion of the camera used for the survey
inspection.
(10) Shall continuously acquire and display the cable distance within the
video image and on the processed reports.
(11) Shall use English measurement units.
Sewer Inspection/Cleaning 02655-4 10/2017
(12) Shall have the ability to place text anywhere within a captured video
or digital image.
(13) Shall generate digital videos with selected reports for playback on
any computer.
(14) Shall be certified, by independent internationally recognized
pipeline authority to have an application accuracy of 0.5% of the
pipe diameter.
(15) Ovality calculation shall be generated per ASTM 1216 (“q” factor).
(16) Shall process circular, elliptical, horseshoe, box, square and custom
shapes.
B. Performance Requirements for 3D Laser Scanning in pipes for pipe sizes equal to
or greater than 48” in diameter:
1. Perform Laser Scanning using personnel trained and certified in the use of
NASSCO’s Pipeline Assessment and Certification Program© (PACP).
Contractor shall submit PACP training certificates of all personnel doing the
work, to the OWNER. Survey records are to conform to the latest NASSCO
PACP codification.
2. Be aware that this Contract requires work in active sanitary and storm
sewers, and follow all federal, state, and local requirements for safety in
confined spaces. Conform to all guidelines set forth by VOSH Compliance
Program and be solely responsible for safety during performance of all
Work.
3. Be responsible for any damage to public or private property resulting from
the laser profiling activities, and repair or otherwise make whole such
damage at no cost to OWNER.
4. Provide all necessary equipment:
a. 3D Laser Scanning: 3D laser scanning equipment shall be capable of
measuring the distances to objects and surfaces in pipes, and shall be
capable of imaging for pipe sizes equal to or greater than 48” in
diameter. A minimum air space of 24” is required for the laser to
operate. The laser shall support 75 Hz scan rates or higher and be
Class 1; eye-safe for operator safety. The laser unit shall be capable of
being repeatedly actuated to provide data that eliminates six degree-
of-freedom sensor alignment problems. The laser sensor resolution
shall be 10 mm, with a laser sensor accuracy of 5mm at 3 meters in
pipelines 48” and larger.
Sewer Inspection/Cleaning 02655-5 10/2017
b. 3D Laser Scanning Software:
(1) The Standard Measurement Software (SMS) shall be designed for
installation on a standard windows based computer (Laptop or
Desktop).
(2) Shall be able to measure minimum and maximum pipe size, ovality
deformation, X-Y axis measurement, and capacity reduction and
shall be able to generate visual and hard copy reports.
(3) Shall be able to generate visual and hard copy reports of 3
dimensional images as well as a flat display of pipe conditions by
percentage color adjustment for the quick analysis of pipeline
problems and defects.
(4) Hard copy reports shall be available in .DOC or PDF format.
(5) Shall be able to accurately measure cracks, joints, bulges, dimples,
and bubbles in CIPP or other relined pipe when combined with a
camera equipped with calibration spot lasers.
(6) Shall use English measurement units.
(7) Shall be certified, by independent internationally recognized
pipeline authority to have an application accuracy of 0.5% of the
pipe diameter.
(8) Ovality calculation shall be generated per ASTM 1216 (“q” factor).
(9) Shall process circular, elliptical, horseshoe, box, square and custom
shapes.
1.5 SUBMITTALS
A. General: Provide all submittals, including the following, as specified in Division
1.
B. Submit the equipment manufacturer's operational manual and guidelines to the
OWNER for review. Strictly follow such instructions unless modified by the
OWNER.
C. Submit three sample inspection reports on a USB flash drive from recent laser
profiling and laser scanning projects of a similar nature. Submit the sample
inspection reports on digital media and provide hard copies.
Sewer Inspection/Cleaning 02655-6 10/2017
D. Submit inspection reports and videos of a quality to the satisfaction of the
OWNER. Provide photos and inspection reports on external hard drive(s) if
requested by the OWNER.
1. USB flash drives and external hard drive(s) submitted become the property
of the OWNER.
2. Maintain a master copy of all inspection reports and videos submitted until
final acceptance of contract and through warranty period.
1.6 QUALITY ASSURANCE
A. Experience Requirements:
1. Verify that the CONTRACTOR has a minimum of 3 years of experience of
Laser Profiling of similar sized infrastructure and 3 years of experience of
3D Laser Scanning for large diameter pipes with sizes equal to or greater
than 48” in diameter.
2. The Contractor shall maintain on site at all times a competent field
supervisor in charge of the inspection. The field supervisor shall be
responsible for the safety of all site personnel and site conditions as well as
ensuring that all work is conducted in conformance with the specifications
and to the level of quality specified
PART 2 PRODUCTS
NOT USED
PART 3 EXECUTION
3.1 PREPARATION
A. Cleaning: Clean pipelines prior to laser profiling/scanning. Provide cleaning in
accordance with Section 02760 – Cleaning of Sewers.
B. Notification: Notify the OWNER at least 24 hours in advance of any laser
profiling/scanning so that the OWNER may observe the operations.
3.2 LASER PROFILING & 3D LASER SCANNING OF PIPELINES
A. The specifications call attention to certain features but do not purport to cover all
details entering into the required work
Sewer Inspection/Cleaning 02655-7 10/2017
B. General: Perform Laser Profiling on one sewer section that are less than 48” and
perform 3D Laser Scanning on one sewer section that are greater than 48” (i.e.
manhole to manhole) at a time. Ensure that the laser image is in the field of view
of the camera while the CCTV camera moves through the pipe.
C. Laser Profiling/Scanning: Perform Laser Profiling and 3D Laser Scanning
immediately after pipeline cleaning, unless specifically allowed by the OWNER.
Do not allow profiler or scanner and the inspection camera to immediately follow
behind the cleaning mechanism, but rather follow once at a minimum distance of
8-feet from nozzle.
D. Flow Control: Adequately control the flow in the pipeline being laser profiled or
scanned. Do not exceed the depth of wastewater flow shown below: Unless
allowed by OWNER.
Pipe Diameter
(Inches)
Depth of Flow
(Percent of Pipe Diameter)
6 – 10 10
12 – 24 15
Over 24 25
1. If during laser profiling or scanning of a sewer section, the wastewater flow
depth exceeds the maximum allowable, reduce the flow depth to an
acceptable level by performing the work during minimum flow hours, by
diversion pumping or other acceptable dewatering device. Divert the flow in
accordance with Section 02150 – Bypass Pumping.
E. Pipeline Inspection Camera: Move the pipe inspection camera through the pipeline
in the downstream direction at a uniform rate, stopping when necessary to ensure
proper documentation of the sewer's condition, but do not pull the pipe inspection
camera at a speed greater than 30 feet per minute or 9 meters per minute. Position
camera for inspection at the center point of the diameter or as nearest the center of
non-circular piping.
F. Pipeline Conditions: Inspect pipelines by use of the pan-and-tilt feature of the pipe
inspection to determine the condition of the pipeline. Document the conditions,
defects and observations of pipelines using NASSCO’s Pipeline Assessment and
Certification Program© codes.
G. Laser Profiling Quality: Reject work that has camera distortions, inadequate
lighting, dirty lens, excessive lighting or blurred/hazy picture of the associated line
segment. Re-profile any laser profiling deemed unacceptable by the OWNER at
no additional cost to the OWNER. Payment for laser profiling will not be made
until OWNER approves the quality of the inspection report and video.
Sewer Inspection/Cleaning 02655-8 10/2017
3.3 DOCUMENTATION AND INSPECTION REPORT
A. Inspection Report: For each Laser profile and 3D Laser scanning inspection,
provide a completely printed inspection report generated by the profiler software
that clearly identifies the location of defects and observations indexed in relation to
adjacent manholes.
1. An integrated overview of data is to be presented in a color coded format as
an unrolled illustration of the pipe condition above the flow line (9:00 to
3:00 clocking angles inclusive) over the length of the inspection segment.
Coded distinctions shall be provided for pipe ID that coincides with
expected values, material loss (corrosion) or outward deformations as
measured by increasing pipe ID, advanced corrosion or deformation, and
material gain (buildup) or inward deformation as measured by decreasing
pipe ID.
2. Precision high resolution laser scan views identifying ovality and deflection
must be presented in a cross-section view where precision scans were taken
during the pipe inspection survey with color coding consistent with the other
defects.
B. Document defects and observations in inspection reports, and supply a copy of
such records together with CCTV reports to the OWNER. CCTV reports shall be
in accordance with specification section 02651 – Television Inspection.
1. Hard Copy: Provide three (3) hard copies of the inspection report to the
OWNER.
2. Digital Media: Provide the inspection report to the OWNER on digital
media that is Microsoft PC compatible. Provide computer files in standard
format. Contact the OWNER for format requirements.
3. JPEG Images: Link JPEG images to inspection report for viewing and
printing when reviewing inspection reports on digital media.
4. MPEG Video: Provide a link to the MPEG video for each defect and
observation surveyed during the pipeline inspection. Videos must play via
standard MPEG-ready software, requiring no proprietary software.
5. Inspection Report Format: Provide each laser inspection report together
with the corresponding CCTV inspection report as specified under
specification section 02651.
C. Digital Video/Audio Recording: Provide each inspection report with digital video
of the inspection.
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1. Include both audio and video information that accurately reproduces the
original picture and sound of the laser profile inspection. Provide the video
portion of the digital recording that is free of electrical interference and
produces a clear and stable image. Provide the audio portion that is
sufficiently free of background and electrical noise as to produce an oral
report that is clear and discernible.
2. Include in the digital recording a visual and audio narrative noting:
a. Date, time of day, and depth of flow;
b. Sewer segment number as provided by OWNER;
c. Upstream manhole number;
d. Downstream manhole number;
e. Type of sewer (e.g. sanitary, storm, combined);
f. Size of sewer;
g. Sewer materials of construction;
h. Closest street address and street name on which sewer is located;
i. Direction of movement of camera, heading, and direction of flow;
j. Reason for inspection.
3. Create separate MPEG video files for each pipe segment inspected. If a
reverse setup is required, store the individual portions of that pipe segment
in separate MPEG video files.
4. Provide a USB flash drive for each pipe segment inspected. A maximum of
five (5) pipe segment inspections may be included on the same flash drive as
long as they are contiguous. Provide flash drives that are readable.
Unreadable/corrupted flash drives will be returned and new ones provided at
no cost to the OWNER. Compile pipe inspections onto an external hard
drive(s) at end of project and provide to the OWNER if requested by the
OWNER.
5. Continuously display the manhole reach (i.e., manhole to manhole), date,
time and length (in feet and tenth of feet) from starting manhole on the
MPEG video. Place information on screen where it is clearly visible but
does not interfere with video image.
6. Perform the pipeline inspection that consists of identifying a location both
within the pipe segment (physical location) and within the digital recording
(video frame location) for each defect or observation. Do not use time codes
for defect location. This will allow the digital recording and inspection data
to be cross-referenced for instant access to any point of interest within the
digital recording.
7. USB Flash Drive and External Hard Drive Label: Place a tag with a typed
label on the USB flash drive. For external hard drive, attach a typed label on
the face of the hard drive. The label shall include the following information:
Sewer Inspection/Cleaning 02655-10 10/2017
a. Assignment Number
b. CONTRACTOR’S Name
c. Inspection Type: Survey, Pre-Installation, Post-Installation
d. Date Televised
e. Date Submitted
f. Basin Number
g. Street Name
h. Pipe Diameter
i. Pipe Length
j. Street Name
k. Pipe Condition Rating as Established by the OWNER
END OF SECTION
Sewer Inspection/Cleaning 02656-1 10/2017
SECTION 02656
SEWER SONAR INSPECTION
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes: Sonar inspection of underground mainline pipes to allow for
determination of internal pipeline conditions below fluid level prior to and/or after
rehabilitation (lining), pipeline geometry and quantitative information regarding
internal pipe diameter, including ovality. In partially full pipes, sonar profiling
shall be carried out simultaneously with Closed-Circuit Television (CCTV)
Inspection as specified in Section 02651. In pipes flowing full, sonar profiling
shall be carried out as a standalone item.
B. Related Work Specified in Other Sections Include:
1. Section 02150 - Bypass Pumping
2. Section 02651 - Television Inspection
3. Section 02655 – Sewer Laser Profiling
4. Section 02760 - Cleaning of Sewers
1.2 REFERENCES
A. Codes and standards referred to in this Section are:
1. National Association of Sewer Service Companies (NASSCO), Pipeline
Assessment and Certification Program©.
2. Virginia Occupational Safety and Health (VOSH) Compliance Program.
3. ASTM F 1216 - Standard Practice for Rehabilitation of Existing Pipelines
and Conduits by the Inversion and Curing of a Resin-Impregnated Tube
1.3 DEFINITIONS
A. Sonar Profiling: Sonar profiling is a technique that uses sound waves to determine
the surface profile of mainline pipes through using a sonar profiler attached to the
CCTV inspection equipment or camera or as a standalone item
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1.4 SYSTEM DESCRIPTION
A. Performance Requirements:
1. Perform sonar profiling using personnel trained and certified in the use of
NASSCO’s Pipeline Assessment and Certification Program© (PACP).
Contractor shall submit PACP training certificates of all personnel doing the
work, to the OWNER. Survey records are to conform to the latest NASSCO
PACP codification. The final report of pipeline condition assessment from
sonar profiling shall be similar to the reports generated for CCTV inspection
as specified in Section 02651.
2. Be aware that this Contract requires work in active sanitary and storm
sewers, and follow all federal, state, and local requirements for safety in
confined spaces. Conform to all guidelines set forth by VOSH Compliance
Program and be solely responsible for safety during performance of all
Work.
3. Be responsible for any damage to public or private property resulting from
the laser profiling activities, and repair or otherwise make whole such
damage at no cost to OWNER.
4. Provide all necessary equipment:
a. Sonar Profiler: Select a sonar profiler that is a stand-alone tool which
may or may not be used with the CCTV inspection equipment to
collect survey data and create pipeline reports containing the
measurement of defects and other features inside the pipeline.
(1) Provide base system to include underwater scanning unit,
collapsible sonar siphon float, sonar process/monitor, skid set
and all necessary appurtenances to survey fully submerged (all,
water, no air) and semi submerged pipelines and/or pipelines
containing heavy silt without disrupting the service.
(2) For semi submerged pipeline inspections sonar image shall be
superimposed on the picture to display views above and below
the waterline on one monitor.
(3) Provide equipment with multi-frequency programmable sonar
capable of locating and mapping irregularities by creating
continuous sonar images recorded in real-time mode. The Sonar
equipment shall have the ability to adjust the sonar’s axis and
consequently get additional representation of areas of interest
within the pipe.
Sewer Inspection/Cleaning 02656-3 10/2017
(4) The sonar profiler system shall provide visual profile, profile
comparison, and dimensional profile of significant items and
defects, and shall also generate a two-dimensional profile of the
interior pipe wall.
(5) Provide digital sonar equipment, capable of measuring the
distances to objects and surfaces in pipes, and also capable of
imaging pipe sizes ranging from 12” through 72”.
(6) The sonar profiler shall provide measurements of pipe size,
laterals, water levels, faults and other features, as well as
quantitative information regarding internal pipe diameter,
including ovality and capacity, sediment depths and
accumulation.
b. Mounting Assembly: Provide a camera mounting fixture or a skid
type mount and transport assembly for inspection of pipes to insure
maximum stabilization during pipe inspection. The mounting
assembly shall allow for simultaneous video inspection and sonar
profiling, shall be capable of forward/ stop/backward mobility and
also be able to support the video camera equipment above the water
level and the submerged sonar equipment.
(1) For fully submerged pipeline inspections provide system with
sonar siphon float designed to position the sonar in the center of
the pipeline to ensure accurate measurements. Include skid set
specially designed to align the sonar system in submerged
pipelines.
(2) For partially submerged pipeline inspections, provide system
with a float designed to position the camera above the waterline
and the sonar below the waterline to provide a 360-degree survey
of the pipeline.
c. Sonar Profiler Software:
(1) The profiler software shall be designed for installation on a
standard windows based computer (Laptop or Desktop).
(2) Shall be able to measure minimum and maximum pipe size, ovality
deformation, X-Y axis measurement, and capacity reduction and
shall be able to generate visual and hard copy reports.
(3) Post-processed data shall include the capability of measuring any
two points within the displayed video or digital images. The sonar
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software shall be capable of projecting a circle overlay, sizing and
moving anywhere within the image for checking erosion or
remaining wall thickness.
(4) Shall be able to generate visual and hard copy reports of 3
dimensional images as well as a flat display of pipe conditions by
percentage color adjustment for the quick analysis of pipeline
problems and defects.
(5) Hard copy reports shall be available in PDF format.
(6) Shall be able to accurately measure cracks, joints, bulges, dimples,
and bubbles in CIPP or other relined pipe.
(7) Shall include a calibration target to calibrate and verify proof of
calibration for every inspected pipe segment.
(8) Shall correct for barrel distortion of the camera used for the survey
inspection.
(9) Shall continuously acquire and display the cable distance within the
video image and on the processed reports.
(10) Shall be adjustable for metric or imperial measurement units.
(11) Shall have the ability to place text anywhere within a captured video
or digital image.
(12) Shall generate digital videos with selected reports for playback on
any computer.
(13) Shall be certified, by independent internationally recognized
pipeline authority to have an application accuracy of 0.5% of the
pipe diameter.
(14) Ovality calculation shall be generated per ASTM 1216 (“q” factor).
(15) Shall process circular, elliptical, horseshoe, box, square and custom
shapes.
1.5 SUBMITTALS
A. General: Provide all submittals, including the following, as specified in Division
1.
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B. Submit the equipment manufacturer's operational manual and guidelines to the
OWNER for review. Strictly follow such instructions unless modified by the
OWNER.
C. Submit three sample inspection report on a USB flash drive from recent sonar
profiling projects of a similar nature. Submit the sample inspection reports on
digital media and provide hard copies.
D. Submit inspection reports and videos of a quality to the satisfaction of the
OWNER. Provide photos and inspection reports on external hard drive(s) if
requested by the OWNER.
1. USB flash drives and hard drive(s) submitted become the property of the
OWNER.
2. Maintain a master copy of all inspection reports and videos submitted until
final acceptance of contract and through warranty period.
1.6 QUALITY ASSURANCE
A. Experience Requirements:
1. Verify that the CONTRACTOR has a minimum of 5 years of experience of
sonar profiling of similar sized infrastructure.
2. The Contractor shall maintain on site at all times a competent field
supervisor in charge of the inspection. The field supervisor shall be
responsible for the safety of all site personnel and site conditions as well as
ensuring that all work is conducted in conformance with the specifications
and to the level of quality specified
PART 2 PRODUCTS
NOT USED
PART 3 EXECUTION
3.1 PREPARATION
A. Cleaning: Clean pipelines prior to sonar profiling. Provide cleaning in accordance
with Section 02760 – Cleaning of Sewers.
B. Notification: Notify the OWNER at least 24 hours in advance of any sonar
profiling so that the OWNER may observe the operations.
Sewer Inspection/Cleaning 02656-6 10/2017
3.2 SONAR PROFILING OF PIPELINES
A. The specifications call attention to certain features but do not purport to cover all
details entering into the required work
B. General: Perform sonar profiling on one sewer section (i.e. manhole to manhole) at
a time
C. Sonar Profiling: Perform sonar profiling immediately after pipeline cleaning,
unless specifically allowed by the OWNER. Do not allow profiler and the
inspection camera to immediately follow behind the cleaning mechanism, but
rather follow once at a minimum distance of 8-feet from nozzle.
D. Flow Control: Adequately control the flow in the pipeline being profiled by
providing the right mounting assembly. Ensure that the sonar profiler is able to
clear the channel bottom and the camera is able to clear the crown of pipe during
sonar and CCTV profiling. In addition to providing adequate mounting assembly
as specified under section 1.4, the following adjustments may have to be made to
allow for adequate clearance:
1. Where only sonar profiling is being conducted work hours may have to be
adjusted to allow for inspection to be carried out when pipe is flowing full.
2. During combined sonar and CCTV inspections (i.e. in partially full pipes)
work hours may have to be adjusted to allow for inspection to be conducted
during low flow periods.
E. Pipeline Inspection Camera: Move the pipe inspection camera through the pipeline
in the downstream direction at a uniform rate, stopping when necessary to ensure
proper documentation of the sewer's condition, but do not pull the pipe inspection
camera at a speed greater than 30 feet per minute or 9 meters per minute. Position
camera for inspection at the center point of the diameter or as nearest the center of
non-circular piping.
F. Pipeline Conditions: Document the conditions, defects and observations of
pipelines using a format similar to NASSCO’s Pipeline Assessment and
Certification Program© codes.
G. Sonar Profiling Quality: Reject work that has camera distortions, inadequate
lighting, dirty lens, excessive lighting or blurred/hazy picture of the associated line
segment. Re-profile any sonar profiling deemed unacceptable by the OWNER at
no additional cost to the OWNER. Payment for sonar profiling will not be made
until OWNER approves the quality of the inspection report and videos.
Sewer Inspection/Cleaning 02656-7 10/2017
3.3 DOCUMENTATION AND INSPECTION REPORT
A. Inspection Report: For each Sonar profile inspection, provide a completely printed
inspection report generated by the profiler software that clearly identifies the
location of defects and observations indexed in relation to adjacent manholes.
Record defects and observations that shall be recorded include structural
deficiencies, the locations and estimations of extraneous flows of service
connections, joints, infiltration, unusual conditions, material transitions, roots,
storm sewer connections and cracked or collapsed sections, the presence of scale
and corrosion, signs of previous leakage, sewer line sections that the camera failed
to pass through and reasons for the failure and other discernible features and data
of significance. Document defects and observations in inspection reports, and
supply a copy of such records to the OWNER
1. Final reports must also include graphical display of sediment volume and
location, sediment levels and pipe capacity depicting actual versus ideal
storage capacity. The data shall be compiled in a format that allows for
calculating changes in sediment depth, sediment volume. And sediment
accumulation, when compared to past or future condition assessments.
2. Precision high resolution sonar scan views identifying ovality and deflection
must be presented in a cross-section view where precision scans were taken
during the pipe inspection survey with color coding and legend.
3. Hard Copy: Provide three (3) hard copies of the inspection report to the
OWNER.
4. Digital Media: Provide the inspection report to the OWNER on digital
media that is Microsoft PC compatible. Provide computer files in standard
format. Contact the OWNER for format requirements.
5. Defect and Observation Codes: Document defects and observations utilizing
coding similar to the latest release of NASSCO’s Pipeline Assessment and
Certification Program© codes. Provide a table listing acronyms and their
meaning with the logs.
6. JPEG Images: Each inspection report shall provide JPEG images of defects
that are in comparison, greater than NASSCO PACP codification grade 3
and observations, including looking up all service laterals, surveyed during
CCTV inspections in the inspection report. Link JPEG images to inspection
report for viewing and printing when reviewing inspection reports on digital
media.
7. MPEG Video: Provide a link to the MPEG video for each defect and
observation surveyed during the pipeline inspection. Videos must play via
standard MPEG-ready software, requiring no proprietary software.
Sewer Inspection/Cleaning 02656-8 10/2017
8. Pipeline Condition Rating: Provide a pipeline condition rating in each
inspection report. Use coding similar to NASSCO’s Pipeline Assessment
and Certification Program©, Condition Grading System to determine the
pipeline condition rating.
9. Inspection Report Format: Provide each inspection report with the
following:
a. Sonar Inspection Form: Provide each inspection report with a Sonar
Inspection Form. Use a Sonar Inspection Form that is of a layout and
format similar to NASSCO’s Pipeline Assessment and Certification
Program©, CCTV Inspection Form.
b. Sonar Inspection Graphic Form: Provide each inspection report with a
Sonar Inspection Graphic Form. Include the following in the Sonar
Inspection Graphic Form:
(1) A pipeline illustration showing the pipe and the upstream and
downstream manholes. Show the location of the each defect
and observation in the pipeline illustration.
(2) A record of each defect and observation from the starting
manhole during the inspection. Include the distance from the
starting manhole, coding similar to NASSCO’s Pipeline
Assessment and Certification Program© codes, and identify the
JPEG image for each defect and observation.
(3) Direction of flow and direction of camera movement.
c. Sonar Inspection Image Form: Provide each inspection report with a
Sonar Inspection Image Form. Show a record of each defect and
observation during the inspection with JPEG images displayed with
each defect and observation.
d. Pipeline Condition Rating Form: Provide each inspection report with
a Pipeline Condition Rating Form. Include the following in the
Pipeline Condition Rating Form:
(1) List the number of structural defects and the number of
operation and maintenance defects per condition grade, (similar
to NASSCO PACP Condition Grades 1 through 5).
(2) List the Structural Pipe Rating, Operations and Maintenance
Pipe Rating, Overall Pipe Rating and Pipe Rating Index.
Sewer Inspection/Cleaning 02656-9 10/2017
B. Document defects and observations in inspection reports, and supply a copy of
such records reports to the OWNER.
1. Hard Copy: Provide three (3) hard copies of the inspection report to the
OWNER.
2. Digital Media: Provide the inspection report to the OWNER on digital
media that is Microsoft PC compatible. Provide computer files in standard
format. Contact the OWNER for format requirements.
3. JPEG Images: Link JPEG images to inspection report for viewing and
printing when reviewing inspection reports on digital media.
4. MPEG Video: Provide a link to the MPEG video for each defect and
observation surveyed during the pipeline inspection. Videos must play via
standard MPEG-ready software, requiring no proprietary software.
5. Inspection Report Format: Provide each sonar inspection report together
with in a format similar to CCTV inspection report as specified under
specification section 02651.
C. Digital Video/Audio Recording: Provide each inspection report with digital video
of the inspection.
1. Include both audio and video information that accurately reproduces the
original picture and sound of the laser profile inspection. Provide the video
portion of the digital recording that is free of electrical interference and
produces a clear and stable image. Provide the audio portion that is
sufficiently free of background and electrical noise as to produce an oral
report that is clear and discernible.
2. Include in the digital recording a visual and audio narrative noting:
a. Date, time of day, and depth of flow;
b. Sewer segment number as provided by OWNER;
c. Upstream manhole number;
d. Downstream manhole number;
e. Type of sewer (e.g. sanitary, storm, combined);
f. Size of sewer;
g. Sewer materials of construction;
h. Closest street address and street name on which sewer is located;
i. Direction of movement of camera, heading, and direction of flow;
j. Reason for inspection.
Sewer Inspection/Cleaning 02656-10 10/2017
3. Create separate MPEG video files for each pipe segment inspected. If a
reverse setup is required, store the individual portions of that pipe segment
in separate MPEG video files.
4. Provide a USB flash drive for each pipe segment inspected. A maximum of
five (5) pipe segment inspections may be included on the same flash drive as
long as they are contiguous. Provide flash drives that are readable.
Unreadable/corrupted flash drives will be returned and new ones provided at
no cost to the OWNER. Compile pipe inspections onto an external hard
drive(s) at end of project and provide to the OWNER if requested by the
OWNER.
5. Continuously display the manhole reach (i.e., manhole to manhole), date,
time and length (in feet and tenth of feet) from starting manhole on the
MPEG video. Place information on screen where it is clearly visible but
does not interfere with video image.
6. Perform the pipeline inspection that consists of identifying a location both
within the pipe segment (physical location) and within the digital recording
(video frame location) for each defect or observation. Do not use time codes
for defect location. This will allow the digital recording and inspection data
to be cross-referenced for instant access to any point of interest within the
digital recording.
7. USB Flash Drive and External Hard Drive Label: Place a tag with a typed
label on the USB flash drive. For external hard drive, attach a typed label on
the face of the hard drive. The label shall include the following information:
a. Assignment Number
b. CONTRACTOR’S Name
c. Inspection Type: Survey, Pre-Installation, Post-Installation
d. Date Televised
e. Date Submitted
f. Basin Number
g. Street Name
h. Pipe Diameter
i. Pipe Length
j. Street Name
k. Pipe Condition Rating as Established by the OWNER
END OF SECTION
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Sewer Inspection/Cleaning 02760-1 10/2017
SECTION 02760
CLEANING OF SEWERS
PART 1 GENERAL
1.1 SUMMARY
A. Section Includes: Furnish all material, labor, supervision, and equipment required to clean pipelines as specified herein complete with all appurtenances and accessories, as required. Work may include trimming protruding sewer taps which will be paid separately under the Contract Items for Trimming Protruding Service Connections. Control flow in sewers, as needed, to permit the Work to be accomplished by use of plugs, flow restrictors, pumped bypasses or other means approved by ENGINEER.
B. Related Work Specified in Other Sections Includes:
1. Section 02010 - Erosion and Sediment Control2. Section 02110 - Clearing, Grubbing, and Site Restoration3. Section 02150 - Bypass Pumping4. Section 02651 - Television Inspection
1.2 DEFINITIONS:
A. Light cleaning is defined as a minimum of two passes and a maximum of three passes with the high velocity hydraulic-cleaning equipment. Restrict the first pass to 800 psi at the nozzle head. Use pressures for the second and subsequent passes at 1,200 psi.
B. Heavy cleaning is defined as removing all obstructions and debris including but not limited to grease, concrete, or grout in an unlimited number of passes by high velocity hydraulic-cleaning equipment after using buckets, scrapers, scooters, porcupines, kites, heavy-duty brushes, metal pigs, cutters, and other debris removing equipment. Mechanical root cutter may be used in conjunction with the hydraulic-cleaning to loosen harden debris, roots, and grease. Heavy Cleaning requires prior-authorization from the OWNER. Provide the OWNER with photo or video evidence documenting the need for heavy cleaning after Light Cleaning has been completed. The CONTRACTOR is to notify the City if obstructions and debris cannot be removed through the use of the means and methods specified. The City upon evaluation, will make a determination whether the CONTRACTOR is relieved of further cleaning passes, after the notification.
C. Chemical root treatment and chemical grease treatment may be used in conjunction with Light or Heavy Cleaning. These are separate Bid Items from Cleaning.
Sewer Inspection/Cleaning 02760-2 10/2017
1.3 SYSTEM DESCRIPTION
A. Be aware that this Contract requires work in active sanitary and storm sewers, and follow all Federal, State and local requirements for safety when in confined spaces. Conform with all guidelines by the Occupational Safety and Health Administration (OSHA) Federal Regulations; 29 CFR Ch. XVII, Section 1910.146 Confined Space Entry. Be solely responsible for safety during the performance of all Work.
B. Have experience in the cleaning of sewers of all types, configurations, and pipe wall material. Furnish documentation of experience to the OWNER upon request.
C. Take precautions to protect sewer mains and manholes from damage that might be inflicted by the improper selection of the cleaning process or improper use of the equipment. When using hydraulically propelled devices, take precautions to ensure that the water pressure created does not cause damage or flooding to public or private property. Do not surcharge the sewer beyond the elevation that could cause overflow of sewage into area waterways, homes, or buildings or onto the ground. Notify OWNER immediately of any damage to homes or other private property due to sewer cleaning operations. Be responsible for any damage to public or private property resulting from the cleaning activities, and repair or otherwise make whole such damage at no cost to OWNER.
D. Recognize that there are some conditions such as broken pipe that prevent cleaning from being accomplished or where damage would result if cleaning were attempted or continued. Should such conditions be encountered, immediately notify the OWNER.
1.4 SUBMITTALS
A. General: Provide all submittals, including the following, as specified in Division 1.
B. Submit a plan for disposal of debris and sediment removed from the sewer lines, specifications of the sewer cleaning equipment to be used on the job, and specifications on the equipment to be used to remove sediment and debris at the downstream manhole of each reach to be cleaned.
PART 2 PRODUCTS
2.1 CLEANING EQUIPMENT
A. Clean all sewers with truck-mounted, high velocity hydraulic-cleaning equipment. Mechanical bucket machinery is acceptable for the cleaning process with authorization by the OWNER. Use equipment provided with a minimum of 500 ft of 1-inch internal diameter high pressure hose with a selection of high velocity nozzles, as required for the cleaning operation. Use a sewer cleaner that has a minimum usable water capacity of 600 gallons. Use pumps capable of delivering a
Sewer Inspection/Cleaning 02760-3 10/2017
minimum 60 gpm at 1,200 psi at the nozzle head. Regulate pressure to the nozzle by a relief valve, adjustable from 0 to 1,500 psi minimum. Use nozzles that produce a scouring action from 15 to 45 degrees in all size sewers to be cleaned. Use equipment that carries its own 1,000 gallon water tank capable of holding corrosive or caustic cleaning or sanitizing chemicals, auxiliary engines and pumps, and a hydraulically-driven hose reel. Use equipment that includes a high velocity washing hose for ancillary cleaning of the walls, bench, and invert of the manhole. Use a hose that has an adjustable nozzle capable of producing flow from a fine spray to a solid stream. Locate all controls so that the equipment can be operated from above ground. During hydraulic-cleaning, restrict the flow level in the pipe to a maximum of 50 percent of the pipe diameter. Take particular care to avoid flooding house connections during hydraulic-cleaning operations.
B. Provide equipment capable of removing all sand, dirt, rocks and other debris from the sewer reach to allow unobstructed remote CCTV internal inspection of all internal surfaces and subsequent pressure testing of all sewer joints.
C. Own or lease and operate all cleaning equipment, including machines, devices, tools, etc., required for the entire cleaning operation. Certify that backup cleaning equipment is available and can be delivered to the site so the project can be completed on schedule.
D. Remove any blockages of service connections resulting from the cleaning or other items of Work at no cost to the OWNER. Be responsible for any damage or cleaning to private structures required due to water entering from cleaning operation at no cost to OWNER. Correct any damage caused by flooding of lateral building connections, and notify the OWNER.
E. Provide all equipment capable of mechanically removing roots. Use a root saw, spring blade root cutter chuck or approved equal.
PART 3 EXECUTION
3.1 CLEANING
A. The cleaning work required includes, but is not limited to, the following:
1. Field locating and uncovering all manholes, inlets, and catch basins along the sewer reaches to be cleaned. Use state-of-the-art locating equipment to locate and mark above-ground the location of all manholes, inlets, and catch basins included in the pipeline sections detailed in the scope of Work. Uncover and raise any buried or paved-over manholes.
2. Maintaining and protecting both vehicular and pedestrian traffic, and meeting all requirements of the OWNER and all other governmental agencies having jurisdiction.
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3. Cleaning of existing sanitary sewers, storm sewers, combined sewers, manholes, as hereinafter specified, to permit proper CCTV inspection and rehabilitation techniques.
4. Disposal of waste, debris, and sediment as specified herein.
5. Removal and disposal of roots as specified herein.
6. Removal of protruding service connections.
7. Cleaning up as the Work progresses and after the completion of all Work activities.
8. All other work required for the complete and satisfactory cleaning of the pipeline.
B. After determining the preliminary requirements and the feasibility of effective video inspection, thoroughly clean all pipeline reaches, manhole inverts and benches in order to permit an unrestricted inspection by CCTV. Carefully remove accumulated grease, roots, sand, rocks, sludge and other debris and obstructions so that the video inspection will show clearly all portions of the pipe being inspected. Acceptable pipeline cleaning shall be determined upon successful completion of CCTV inspection. Acceptable pipeline cleaning is defined as removing sufficient material to ensure an effective rehabilitation of the pipeline, to the satisfaction of the OWNER. If CCTV inspection shows the cleaning to be unsatisfactory, reclean and reinspect the pipeline at no additional cost to the OWNER.
C. The CONTRACTOR shall obtain water required for cleaning by connection to City fire hydrants, provided the connection is made in accordance with City requirements. Provide notice to City Agencies prior to withdrawing water from the hydrants. The CONTRACTOR shall obtain a portable water meter from the City’s Department of Public Utilities and attach a RPZ backflow preventer to the meter in accordance with City standards. A $500.00 deposit for the meter is paid to the City’s Department of Public Utilities. The contractor will pay the Department of Public Utilities for water usage at established rates. Contact the City’s Department of Public Utilities, Special Billing department (804 646-5270) for current water rates. Support meter and backflow preventer so as to not damage hydrants. Be responsible for any damage resulting from improper operation of hydrants. Do not use or obstruct a fire hydrant when there is a fire in the area. Remove water meters, fittings, and piping from fire hydrants at the end of each working day.
D. Do not waste water from the public water supply because of improper connections or from hydrants left opened.
E. Remove all bricks, rocks, debris, sludge, dirt, sand, grease, roots and other materials from the pipelines, manhole benches, drop inlets, and all other
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appurtenances as specified herein, and collect and remove the resulting debris from the downstream manhole benches, drop inlets, and all other appurtenances of the pipelines being cleaned. Do not pass waste material between manholes. When necessary, temporarily install a dam trap or weir and screen in the downstream manhole in such manner that traps debris and solids and retains them for subsequent removal. Submit these devices for approval for use.
F. Remove waste and debris cleaned from the sewers from the downstream manhole by vacuum pumps or other means. Return the discharge and drainage stream to the sewer and discharge downstream for disposal. Do not dump under any circumstances sewage or solids onto the ground surface, street, or into ditches, catch basins or storm drains. If sewage is unintentionally spilled, discharged, leaked, or otherwise deposited in the open environment, be responsible for any clean-up and disinfection of the affected area, and comply with all local, State, and Federal regulatory requirements regarding spills. Place all solids and semi-solids in a watertight container so that no spillage or leakage will occur, cover to minimize odors, and dispose. Be responsible for all operations and costs associated with removal, transportation, tipping and disposal of debris collected during the cleaning operations.
1. Waste shall either be:
a. Transported to the City of Richmond Wastewater Treatment Plant screening grit pad for temporary storage and disposed by the OWNER’s Wastewater Treatment Plant solids waste disposal contractor. The waste shall be transported and disposed off to the screening grit pad at the end of each working day.
b. Disposed in a legally-permitted disposal site, as coordinated with the OWNER.
2. As required by the OWNER, dispose of waste using a transporter that has a valid City of Richmond Liquid Waste Transporter Permit.
G. Where access to manholes in easements and rights-of-way is required, obtain permission for access, in writing, for equipment.
H. Use barricades and warning signs in Work areas and around open manholes. Furnish and maintain traffic controls and safety devices as required.
I. Conform to the following requirements:
1. Complete cleaning of upstream reaches of the sewer before the downstream reaches are cleaned.
2. Insert hydraulic-cleaning equipment in the downstream manhole of the reach, and proceed upstream with the Work;
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3. Do not damage the existing pipelines with winching equipment.
J. If, in the progress of the Work, it is found that some manhole covers are buried beneath the pavement, notify the OWNER. If the OWNER determines that access through the manholes is vital to the Work, expose the cover and reset the frame so that the cover is flush with the pavement. Restore the pavement surrounding the manhole to match the existing pavement. Replace manhole frame and cover if required. Such work will be reimbursed by the Contract Items 56, 57 and 58 for manhole frame and cover replacement and manhole risers, respectively.
3.2 ROOT REMOVAL
A. At all pipelines or manhole locations with root intrusion, remove the root intrusion by mechanical means.
B. Cut roots by use of a root saw, spring blade root cutter or approved equal.
C. Place screen at the downstream manholes to trap cut roots. Remove and dispose of roots as specified in Paragraph 3.1.E.
D. Cut and remove roots to allow unobstructed survey CCTV inspection and pipe rehabilitation.
3.3 REMOVAL OF PROTRUDING SERVICE CONNECTIONS
A. Be responsible for the removal of protruding service connections and other obstructions that may restrict the passage of CCTV inspection camera and affect the rehabilitation of the sewer pipe as directed by the City. Trimming of protruding service connections will be paid separately under the Contract Items for Trimming Protruding Service Connections.
B. Remove the protruding service connection and obstruction by cutting or grinding with remote cutter. Equip the remote equipment with a grinding/cutting disk capable of removing ductile iron, concrete, vitrified clay and cast iron material. Do not use chain or flail cutting equipment (e.g., Lumberjack) devices without prior authorization from the OWNER. Be responsible for any and all repairs deemed necessary by the Owner, should removal equipment damage existing pipelines.
C. Grind the protruding service connection within ½ inch to the main pipe without scouring or damaging the main pipe.
D. Place a screen at the downstream manhole to prevent cut material flowing downstream. Remove the cut material, and dispose, as specified.
E. Make video recording of the protruding break-in-service connection before and after the grinding operation as specified in Section 02651 – Television Inspection. Submit USBflash drives to the OWNER.
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F. If during removal of protruding service connections, the wastewater flow depth in the sewer is high, CONTRACTOR may reduce the flow depth to an acceptable level by performing the removal of protruding service connections during minimum flow hours, by diversion pumping or by pulling the cutter with swab, high-velocity jet nozzle or other acceptable dewatering device. Divert the flow in accordance with Section 02150 – Bypass Pumping.
3.4 CHEMICAL ROOT TREATMENT
A. As directed by the OWNER, treat manhole and sewer sections that have root intrusion with an acceptable herbicide to aid in the removal of roots. The intent of chemical root treatment is to kill tree roots in sanitary sewer lines and to inhibit root re-growth without damaging the trees, the environment, manholes, sewer sections, or the biological mass of the wastewater treatment plant. Use the chemical root treatment material that is labeled for use in sanitary sewer lines. Use chemicals where the active ingredient must be detoxified by natural chemical/biochemical processes following its use. Submit the manufacturer’s recommended guidelines for proper mixing ratios for maximum daily usage of materials. Use materials and mixing/application procedures for chemical root treatment that are consistent with the latest standards, requirements and recommendations of the manufacturer of the chemical root treatment material used.
B. Apply the herbicide to the roots in accordance with the manufacturer’s recommendations and specifications in such a manner to preclude damage to surrounding vegetation. At no additional cost to the OWNER, replace any damaged vegetation so designated by the OWNER. Adhere to all safety precautions as recommended by the manufacturer concerning handling and application of the herbicide. Use RootX© or approved equal.
C. Provide a two-year warranty from the date of application of the root treatment. Provide a CCTV inspection of the treated line one year after application at no additional cost to the OWNER. Coordinate with the OWNER so that the OWNER may be present at the CCTV inspection. If there are any signs of regrowth or growth that was not killed after the first application, treat the line again at no additional cost to the OWNER.
3.5 CHEMICAL GREASE TREATMENT
A. As directed by the OWNER, treat manhole and sewer sections that have grease deposits with an acceptable degreaser to aid in the removal of deposits. The intent of the grease treatment is to liquefy and remove grease deposits in sanitary sewer lines without damaging the environment, manholes, sewer sections, or the treatment plant. Apply the degreaser in accordance with the manufacturer’s recommendations and specifications in such a manner to remove all deposits. Adhere to all safety precautions as recommended by the manufacturer concerning handling and application of the degreaser. Use Jetfoam© or approved equal.
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B. Demonstrate the effectiveness of the grease treatment by conducting a post-cleaning CCTV inspection two weeks after the application of the grease treatment. If there are any signs of grease deposition, treat the line again at no additional cost to the OWNER.
END OF SECTION