excavation, trenching, and shoring - gulfstream...

46_GS_3311_00February 17, 2015

of 19USGC Gulfstream ProgramThe Dow Chemical Company

EXCAVATION, TRENCHING and SHORING

Excavation, Trenching and Shoring This is a controlled document. No un-authorized modifications.Health, Safety, and Environmental

DOW CONFIDENTIAL – do not use without permission

46_GS_3311_00February 17, 2015


Table of Contents

PURPOSE......................................................................................................................................................................4

SCOPE...........................................................................................................................................................................4

APPLICATION.............................................................................................................................................................4

DEFINITIONS..............................................................................................................................................................4

GENERAL REQUIREMENTS...................................................................................................................................7

1.1 Call to Identify Buried Utilities/Structures.....................................................................................................71.2 Inventories of Underground Installations – On Dow Property.......................................................................71.3 Clearances Prior to Excavation – On Dow Property......................................................................................71.4 Adjacent Block or Line Owner Clearances and Safe Work Permits..............................................................81.5 Working in Excavations and Trenches...........................................................................................................91.6 Inspections by a Competent Person..............................................................................................................101.7 Designating Competent Persons...................................................................................................................111.8 Water Accumulation.....................................................................................................................................111.9 Endangered Adjacent Structures...................................................................................................................111.10 Consult Applicable Standards.......................................................................................................................111.11 Barricades and Tags......................................................................................................................................111.12 Fall Protection...............................................................................................................................................121.13 Air Monitoring..............................................................................................................................................12

SOIL CLASSIFICATION.........................................................................................................................................12

CONFINED SPACE...................................................................................................................................................12

PERMIT SYSTEM.....................................................................................................................................................13

4.1 When Required.............................................................................................................................................134.2 Appointment/Training of Issuers..................................................................................................................13

PROTECTION OF EMPLOYEES...........................................................................................................................13

1.1 Sloping/Benching System.............................................................................................................................131.2 Support, Shield, and Other Protective Systems............................................................................................141.3 Exceptions.....................................................................................................................................................14

ACCESS.......................................................................................................................................................................14

EQUIPMENT..............................................................................................................................................................14

EXCAVATED MATERIALS....................................................................................................................................15

DUST15

TRAINING..................................................................................................................................................................15

RECORDS...................................................................................................................................................................15

INCIDENT REPORTING.........................................................................................................................................15

REFERENCES............................................................................................................................................................16

ATTACHMENTS.......................................................................................................................................................16



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Contractor and Client Approvals

Rev Date Pages Description By Checked Approved Client

00 11/1/2013 Document Procedure in final for initial implementation BF

Rev. Date Revision Summary

00 Nov 1, 2013 Initial format for implementation.

Approver Name / Title Signature Date



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PURPOSE

This standard establishes the requirements for excavating, trenching, and shoring. It includes such operations as spiking; driving of poles, piles, and pipes; chasing; and excavations.

This standard applies to all excavations, trenches, shafts, and other forms of earthwork on the Gulfstream Project. This includes trenching, pile driving, hand digging or use of a backhoe or mechanical equipment to extract and move dirt or hard surfaces in contact with the ground, such as concrete.

This standard applies specifically to Texas Operations in Freeport, Texas. Other locations need to comply with local requirements.

Note: Core drilling and other “break-in/break-through” activities are covered in Practice 45_GS_3309, Electrical Work Safety.

SCOPE

All excavations shall be properly permitted and comply with the requirements outlined below. This practice includes the following major sections:

General Requirements Soil Classification Confined Space Permit System Protection of Employees Access Equipment Excavated Materials Dust Training Records

APPLICATION

This practice applies to work activities and personnel working on the Gulfstream construction sites.

DEFINITIONS

A. ADJACENT BLOCK OR LINE OWNER CLEARANCES - Adjacent block or line owner clearances are designed to provide communications between the Block Owner, Line Owner and the Requester. When it is completed, it is to agree that the work the Requester has outlined will not pose a hazard to the Block Owner or Line Owner, and will not create a hazard for the Requester. Before excavation work can be started by the Requester, a Safe Work Permit must be issued.

B. BENCHING – A method of protecting employees from cave-ins by shaping the sides of an excavation to form one or more horizontal levels or steps.



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C. BLOCK OWNER- The owner or their designee of a block in which excavation is proposed.

D. COMPETENT PERSON - One who has been trained in accordance with OSHA Standard 29 CFR 1926 Subpart P and is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them. A competent person must be present on the job site at all times while employees are in the excavations or trenches.

E. CONTAMINATED SOIL RESPONSE PLAN (CSRP)- Applies to the Gulfstream construction sites in Texas Operations only and is intended to protect workers from exposure to chemicals in soil or debris and to document locations that may need further clean up after termination of the FOA. The plan also initiates the process to evaluate Non-Aqueous Phase Liquids (NAPLs) discovered during construction or excavation activities. Contact a Gulfstream EH&S representative for details of the CSRP.

F. ELEVATED WORK (21_GS_3001 Working at Heights): Any work where personnel are working within 6 feet (1.8 meters) of a drop of 6 feet (1.8 meters) or more as measured from the lowest part of the body. Therefore work within 6 feet of excavations deeper than 6 feet (1.8 meters) is subject to the 21_GS_3001 Working at Heights Standard.

G. EXCAVATION – Any man-made cavity or depression in the earth’s surface formed by earth removal, which produces potentially unsupported earth conditions by reason of the excavation work.

H. EXCAVATOR- Any person or Company performing Machine Excavation work.

I. FACILITY OPERATIONS AREA (FOA) – Refers to the site-wide soil and groundwater permit for Gulfstream projects inside of Texas Operations.

J. HAND EXCAVATION – The penetration of the ground by the use of a shovel or similar implement.

K. LINE OWNERS - The owner or their designee of any buried undergound pipe or pipeline, electrical cable, telephone line or other installation.

L. MACHINE EXCAVATION - The penetration of the ground by the use of any machine.

M. Non-Aqueous Free Phase Contamination- A separate phase of non-aqueous material present at concentrations above its solubility in water. There are two identified types of NAPL, determined by the density relative to water: Light Non-Aqueous Phase Liquids (LNAPLs) that tend to float on top of groundwater and Dense Non-Aqueous Phase Liquids that tend to sink through water.

N. PROTECTIVE SUPPORT SYSTEM - A method of protecting employees from cave-ins. Protective systems include support systems, sloping and benching systems, shield systems and other systems that provide the necessary protection.



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O. REGISTERED PROFESSIONAL ENGINEER (RPE) – A person who is registered by the state/country where the work is to be performed.

P. REQUESTER - Anyone who is responsible for the excavation work that is to be performed.

Q. SAFE WORK PERMIT - The permit issued daily to the excavation crew. (See 58_1302 Gulfstream Safe Work Permit Standard)

R. SHIELDING- A method of shoring using a prefabricated box constructed of wood or steel plates

S. SHORING- A framework support system of wood, metal, or a combination of these that supports the sides of an excavation and is designed to prevent cave-ins (sheeting or sheet piles)

T. SITE REMEDIATION MACT (GGGGG) – EPA regulation that establishes minimum controls and maximum emission limits for specified hazardous pollutants from soil, groundwater, and surface water contaminated with Table 1 HAPs. Contact Dow construction environmental representative.

U. SLOPING- A method of protecting personnel from cave-ins by excavation to form sides of an excavation that are inclined away from the excavation so as to prevent cave-ins. The angle of the incline required to prevent a cave-in varies with differences in such factors as the soil type and environmental conditions.

V. TRENCH – A narrow excavation below the surface of the ground — generally with a width less than the length.

W. UNDERGOUND PIPE OR PIPELINE PROBING: The use of a probe rod for determining undergound pipe or pipeline location and depth. Probing is not considered excavation.



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GENERAL REQUIREMENTS

1.1 Call to Identify Buried Utilities/StructuresBefore commencing work on any excavation or trench, utility companies or owners must be contacted and advised of the proposed work, and to determine the location of underground installations such as sewer, telephone, water, fuel, electric, and gas lines. Overhead hazards must also be assessed and dealt with at this time.

1.2 Inventories of Underground Installations – On Dow Property

THE BLOCK OWNER is responsible for knowing the location of all buried undergound pipe or pipelines, electrical cables, telephone lines or other installations. The Block Owner, or the designee, must maintain up-to-date engineering drawings and record all changes since the drawing was last issued.

UTILITIES DISTRIBUTION DEPARTMENT is responsible for the inventory and drawings of all lines on real estate inside fence lines not assigned to other individuals.

SITE UNDERGOUND PIPE OR PIPELINE OPERATIONS (SPO) in Texas Operations is responsible for the inventory and drawings of all undergound pipe or pipelines on real estate in specified pipe corridors inside the site fence lines and undergound pipe or pipelines between Dow Plants..

GULF COAST UNDERGOUND PIPE OR PIPELINE is responsible for cross-country undergound pipe or pipelines running between gulf coast sites (i.e. undergound pipe or pipelines between the Texas, Seadrift, LaPorte, Grand Bayou, Napoleonville, and Louisiana sites). Texas Operations excavation work will not extend to Gulf Coast Pipeline Site assets.

LINE OWNERS are responsible for keeping up-to-date drawings of the entire system showing which blocks they enter or cross. Changes must be recorded and Block Owners must be notified immediately of changes on their property.

1.3 Clearances Prior to Excavation – On Dow PropertyCONTRACTOR will contact Gulfstream permit writer or representative responsible for excavation permits who will function as the REQUESTER.

REQUESTER will contact the affected Block Owners and SPO (see Contacts section of this document) to determine what departments have underground installations in the Block in the area of the excavation.

REQUESTER will contact the affected Block Owners, Site Remediation Department, and any others with knowledge of possible, historical contamination. If soil, groundwater, or surface water is potentially contaminated (with Table 1 HAPs), REQUESTER must notify Gulfstream construction environmental representative prior to any excavation to ensure compliance with the SITE REMEDIATION MACT (GGGGG).



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BLOCK OWNER will specify to the Requester which departments have underground lines in the area of the excavation.

REQUESTER will contact all specified Line Owners to obtain permission to begin excavation.

LINE OWNERS may grant clearance only if the line owner, or designee, has visited the proposed excavation site if the lines contains hazardous temperatures, chemicals, pressures or equipment that provide critical service as designated by the Line Owner's department head. Clearances for excavation around non-hazardous installations may be granted by phone.

NO MACHINE EXCAVATION, except for work done by the GULF COAST UNDERGOUND PIPE OR PIPELINE SITE, SALT DOME OPERATIONS, and SITE UNDERGOUND PIPE OR PIPELINE OPERATIONS in accordance with written procedures approved by their department heads, shall be approved where the closest point of the excavation is LESS THAN 2 FEET from any existing buried installation containing hazardous temperatures, chemicals, pressures, electricity or equipment that provides critical service as designated by the Line Owner's department head.

CONTACT TEXAS OPERATIONS ENVIRONMENTAL REMEDIATION prior to excavating 5 feet or more deep in Texas Operations Plant A, Plant B, Oyster Creek site and interconnecting rights-of-way. When excavating 5 feet or more deep in other areas, contact the Environmental Representative of the owner department.

ROUTINE grading for maintenance of general plant roads and parking lots shall be exempt from this standard.

EXCAVATION can begin only after all clearances and permits have been obtained and the actual location of underground installations has been verified by manual digging, probing (see 46_GS_3311_03 Underground Pipeline Probing Procedure), or other reliable means approved by the Block Owners.

ANY EXCAVATION WORK WITHIN ELEVEN (11) feet from the center of the rail track within Texas Operations, must have written approval of the Department Head of Rail Track Maintenance or his designee.

RIGHT OF WAY PERMITS (where required) must be obtained prior to excavation in 3rd party right of ways.

WORK NEAR OVERHEAD ELECTRICAL LINES must be done in accordance with 36_GS_3209 Gulfstream Working Near Overhead Lines.

1.4 Adjacent Block or Line Owner Clearances and Safe Work Permits

ADJACENT BLOCK OR LINE OWNER CLEARANCES may be issued to the Requester by Line Owners where required.



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FINAL EXCAVATION CLEARANCE will come from the Block Owner to the Requester in the form of a written Adjacent Block or Line Owner Clearance after the Requester has obtained clearance from all Line Owners.

REQUESTER will issue a Safe Work Permit to the work crew supervisor, or other responsible party, and will direct the safe performance of the job.

1.5 Working in Excavations and TrenchesWhen excavations are less than 5 feet deep, a Competent Person must determine that there is no potential for cave in prior to people performing work in the excavation.

All excavations 5 feet deep or more require either safe sloping, support systems, and/or benching prior to any employee working in the excavated area. (Attachment "A" (a Guide to Selection of Protective Systems as required by OSHA) must be used to determine appropriate protection systems.

A. If sloping is to be used as a method of personnel protection, for the purpose of compliance, all soils shall be classified as a Type "C" soil and all excavations shall be sloped at a maximum of 34 degrees measured from the horizontal. This is equivalent to a slope of 1-1/2 to 1 as shown on Attachment "B". Any other arrangement of back sloping, and any excavation over 20 feet deep, must conform to OSHA Standard 29CFR 1926 Subpart P.

B. If a system of benching is to be used, the soil conditions has to have been classified as Type "B" and any benching system must comply with OSHA standards as shown in Attachment "C". Any other arrangement of benching, and any excavation over 20 feet deep must conform to OSHA Standard 29CFR 1926 Subpart P.

C. If a support system is to be used for personnel protection, all soil conditions shall be classified as Type "C" and the appendix from OSHA Standard 29CFR 1926 Subpart P be used for design purposes. Any other support system must be designed by a Registered Professional Engineer or taken from tables and charts approved by a Registered Professional Engineer.

D. If a trench shield is to be used for personnel protection, the shield must have been designed by a Registered Professional Engineer. A copy of that design must be kept on the construction site for record purposes.

E. Any other system of personnel protection must be based on soil classifications and conform to OSHA Standard 29 CFR 1926 Subpart P or designed by a Registered Professional Engineer. A copy of that design must be present on the job site at all times during construction and then kept on file until completion of the job.

F. If the excavation is to be done adjacent to a building, wall, telephone pole, power pole, or other existing structure, it must be determined that the integrity of the structure will not be compromised by possible undermining. This may require support of the adjacent structure by shoring, bracing, or underpinning, or removal of the structure.

G. All materials of construction must be kept in safe condition at all times and removed from service if damaged or defective.

H. All materials or equipment that might fall or roll into the excavation must be kept back at least 2 feet from the edge of the excavation or restraining devices must be used to protect employees and equipment.



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I. Prior to securing a Safe Work Permit for an excavation in excess of 4 feet in which employees are to work, a Competent Person must determine if a possible oxygen deficiency or a hazardous atmosphere exists or could be reasonably expected to exist. Examples of where this might be true include excavations in an area where contaminants are heavier than air and could accumulate in the depression or excavations around a non-isolated, non-decontaminated line containing hazardous chemicals. Refer to the 54_GS_3322 Gulfstream Confined Space Entry Standard, 54_GS_3322_01 Gulfstream Confined Space Entry Policy and 54_GS_3322_01 Gulfstream Confined Space Entry Policy for requirements.

J. Access and Egress - Safe access and egress to all excavations of 4 feet or more must be maintained at all times while employees are working in an excavation. Ladders, steps, ramps, or other safe means of access/egress will be provided and located no more than 25 feet (7.6 meters) apart laterally. If ladders are used, the ladder will extend 3 feet (.9 meter) above the original surface of the ground and must be secured.

K. Safe egress must be provided and be within 25 feet of lateral travel.

L. Excavation Checklist – 46_GS_3311_01 Gulfstream Excavation Checklist shall be used as a guide to ensure all requirements of the standard are met.

M. Daily Inspection - Inspections of the conditions of the excavation by a Competent Person shall be made each day prior to any individual entering the excavation, after a rain, and as needed throughout the day. 46_GS_3311_02 Gulfstream Excavation Daily Inspection Report is the suggested form for the documentation of the inspection by a Competent Person.

N. All support systems shall be installed and removed in a manner that protects employees from cave-ins, structural collapses, or from being struck by members of the support system. Serious consideration must be given to a support system that can be completely installed and removed from above ground.

O. Personnel shall not work in excavations where water is accumulating unless adequate precautions are taken to protect them against the hazards posed by water accumulation. If water accumulation is controlled or prevented by water removal equipment, the Competent Person must monitor the removal activities to ensure proper operation.

P. Barricades and tags will be installed in accordance with 39_GS_3301 Gulfstream Barricades Signs Tags standard.

Q. When mobile equipment is used or permitted to operate adjacent to excavations or trenches, barricades or “stop” logs will be provided. Wells, pits, shafts, trenches, or other similar ground fall hazards will be barricaded or covered.

1.6 Inspections by a Competent PersonExcavations and trenches, as well as adjacent areas, must be inspected by a Competent Person before work commences on every shift, after every rainfall, as soil conditions change, and as needed throughout the shift where employee exposure can be reasonably anticipated. If any of the following conditions exist, the necessary safety precautions must be taken before any work in that section of the excavation or trench begins/continues:

Possible slides or cave-ins Indications of failure of protective systems



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Hazardous atmosphere Other hazardous conditions

Refer to 46_GS_3311_04 Competent Person Responsibilities for responsibilities of a Competent Person.

Daily inspections must be documented per 1.5M above.

1.7 Designating Competent PersonsCompetent Persons are designated in accordance with Practice 02_GS_1000, HSE General Requirements.

1.8 Water AccumulationPersonnel will not work in excavations where water is accumulating unless adequate precautions are taken to protect them against the hazards posed by water accumulation. If water accumulation is controlled or prevented by water removal equipment, the Competent Person must monitor the removal activities to ensure proper operation.

1.9 Endangered Adjacent StructuresIf an excavation or trench endangers the stability of buildings or walls, shoring, bracing, or underpinning will be provided. Excavations and trenches that are adjacent to backfilled excavations or trenches, or subject to vibrations from railroad or highway traffic, or the operation of machinery (such as shovels, derricks, cranes, and trucks), must be made safe by a support system, shield system, or other protective systems (such as sheetpile shoring or bracing).

1.10 Consult Applicable StandardsApplicable standards for excavation and trenching — or OSHA 29 Code of Federal Regulations (CFR) 1929, Subpart P, whichever is more stringent — should be consulted for other items and circumstances, some of which include:

Structural ramp requirements for access and egress (personnel or equipment) Water removal from excavation Protective system damage Manufacturer’s approval to deviate from standards Support system removal

1.11 Barricades and TagsBarricades are erected in accordance with Practice 39_GS_3301, Barricades, Signs, and Tags.



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1.12 Fall ProtectionFall protection will be provided for employees under the following conditions (refer to Practice 21_GS_3001, Working at Heights):

If working within 6 feet of o a vertical excavation that is 6 feet (1.8 meters) or more in deptho shafts, pits, and wells that are 6 feet (1.8 meters) or more in depth

Note: Fall protection for employees exposed to the above conditions must be implemented. For temporary situations (such as an open excavation with vertical walls 6 feet (1.8 meters) in depth or more that is occupied for a short period of time), physical barriers or personal fall arrest/restraint systems are provided. Shafts, wells, and pits are covered and barricaded, and the covering is labeled “Hole Covering – Do Not Remove” (refer to Practice 39_GS_3301 Barricades Signs Tags, 21_GS_3001 Working at Heights, 21_GS_3001 Gulfstream Life Critical Guard Work Practice).

1.13 Air MonitoringThe supervisor will arrange for the radioactive or chemical monitoring of excavation materials/soils where the presence of unexplained moisture or salts is expected to be encountered. Contact Gulfstream Safety personnel.

SOIL CLASSIFICATIONWhen using protective systems, each soil and rock deposit must be classified by a Competent Person as “Stable Rock, Type A, Type B, or Type C.” The classification will be made based on the results of at least one visual and at least one manual analysis conducted by the Competent Person.

Manual tests will consist of soil plasticity dry strength, thumb penetration, pocket penetrometer, or result from a hand-operated shearvane. Manual tests will be documented, signed, and dated by the Competent Person conducting the test(s).

CONFINED SPACEAll trenches and excavation 4 feet (1.2 meters) or deeper will be assessed regularly for designation as a confined space in accordance with Practice 54_GS_3322, Confined Space Entry and 54_GS_3322_01 Gulfstream Confined Space Entry Policy. Designation, monitoring, emergency preparedness, etc., will be implemented based on entry permit requirements.



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PERMIT SYSTEM

4.1 When RequiredAn excavation permit must be issued by a Gulfstream Excavation Authorized Permit Issuer for all excavations.

4.2 Appointment/Training of IssuersThe appointment and training of Excavation Authorized Permit Issuers is similar to Permit to Work and Confined Space Entry Authorized Permit Issuers (refer to Practice 58_GS_1302, Permit to Work). However, in addition, they will have sound and thorough knowledge in matters relating to the preparation and conduct of excavation.

PROTECTION OF EMPLOYEESEach employee in an excavation must be protected from cave-ins by adequate and approved protection systems.

Protection systems must have the capacity to resist all loads that are intended, or could reasonably be expected, to be applied or transmitted to the system.

Sides, slopes, and faces of all excavations will be scaled, benched, rock-bolted, wire-meshed, or secured by other approved equally effective means. Portable trench boxes or sliding trench shields may be used instead of shoring or sloping. Such boxes or shields must be of strength at least equivalent to the sheeting or shoring that would be required for the composition of the soil or material in which the trench is being made. The requirements below, for the appropriate option, must be followed and properly documented.

1.1 Sloping/Benching SystemThe slopes and configurations of sloping and benching systems for excavations 5 feet (1.5 meters) to 20 feet (6.1 meters) (4 feet [1.2 meters] in Washington State) in depth must be selected and constructed in accordance with the following requirements:

Soil or Rock Type Maximum Allowable Slope(Horizontal Allowable Slope)

Stable Rock Vertical (90° sides)Type A 3/4 foot to 1 foot (53° sides)Type B 1 foot to 1 foot (45° sides)Type C 1-1/2 foot to 1 foot (34° sides)

Note: Simple slope excavations in Type A soil, which are open 24 hours or less (short-term) and which are 12 feet (3.7 meters) or less in depth, will have a maximum allowable slope of 1/2 H:1V (63°).



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Note: Simple slope excavations in Type A soil, which are open 24 hours or less (short-term) and which are greater than 12 feet (3.7 meters) in depth will be 3/4 H:1V (54°).

Note: No soil classification is required if 1-1/2 foot to 1 foot (0.46 meter to 0.30 meter) (Horizontal to Vertical) or 34° slope is used – refer to Attachment 02. If a 1-1/2 foot to 1 foot (Horizontal to Vertical) 34° is not used, a soil classification must be made.

1.2 Support, Shield, and Other Protective SystemsDesigns of support system, shield system, and other protective systems will be selected and constructed in accordance with applicable standards; refer to Attachment 03.

1.3 ExceptionsExceptions to the requirement for protective systems include the following:

Excavations that are made entirely in stable rock (natural solid mineral matter that can be excavated with vertical sides and remain intact while exposed: this must be classified by a Competent Person).

Excavations that are less than 5 feet (1.5 meters) in depth where examination of the ground by a Competent Person reveals no indication of a potential cave-in.

ACCESSIn trenches 4 feet (1.2 meters) or more in depth, ladders, steps, ramps, or other safe means of access/egress will be provided and located no more than 25 feet (7.6 meters) apart laterally. If ladders are used, the ladder will extend 3 feet (.9 meter) above the original surface of the ground and must be secured.

Walkways, ramps, or bridges with standard guardrails will be provided at all excavations and trenches where employees may cross over. The crossing structure will be made of tightly secured and uniformly sized planking or other similar material.

EQUIPMENTWhen mobile equipment is used or permitted to operate adjacent to excavations or trenches, barricades or “stop” logs will be provided. Wells, pits, shafts, trenches, or other similar ground fall hazards will be barricaded or covered.

No one will be allowed under loads handled by mobile equipment (such as shovels, derricks, or hoists), or near vehicles being loaded by mobile equipment. Employees exposed to vehicular traffic operating in the area of excavations or trenches will be provided with, and instructed to wear, orange warning vests or other personal protective equipment marked with or made of reflective or high-visibility material.

Activities must be conducted in accordance with Practice 36_GS_3209 Working Near Overhead Power Lines when working near overhead power lines.



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EXCAVATED MATERIALSEmployees must be protected from excavated or other materials and equipment that could pose a hazard by falling or rolling into excavations. Protection will be provided by placing and keeping such materials or equipment at least 2 feet (1.8 meters) from the edge of the excavation, by the use of retaining devices that are sufficient to prevent materials or equipment from falling or rolling into excavations, or by combination of both.

DUSTAirborne dust will be kept to a minimum by the use of water or other means.

TRAININGAn employee identified as a Competent Person will receive initial required training, and refresher training every 4 years thereafter, in accordance with applicable standards.

RECORDSA completed copy of the Permit Proficiency Approval form, all trench/excavation designs by the RPE (registered in the state/country where the work is being performed), and the permits will be maintained at the site until project completion.

INCIDENT REPORTINGIf any underground installation is struck during either manual digging or machine excavation, the safe work permit issuer, local site Emergency Services and Security (ES&S) as well as the Block Owner and the Line Owner must be notified immediately. Hitting any installation automatically cancels the safe work permit.

If non-aqueous free phase contamination is encountered during an excavation, or if industrial hygiene actions levels are exceeded outside the immediate work area, notify the Gulfstream construction environmental contact who will contact remediation as specified in the Contaminated Soil Response Plan.



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REFERENCES

Document ID Document Title

02_GS_1000 HSE General Requirements

21_GS_3001 Working at Heights (GEWS)

21_GS_3001_02 Gulfstream Life Critical Guard Work Practice

36_GS_3209 Working Near Overhead Power Lines

39_GS_3301 Barricades Signs and Tags

45_GS_3309 Electrical Work Safety

54_GS_3322 Confined Space Entry

54_GS_3322_01 Gulfstream Confined Space Entry Policy

58_GS_1302 Safe Work Permit Standard

Forms:

46_GS_3311_01 Gulfstream Excavation Checklist

46_GS_3311_02 Gulfstream Excavation Daily Inspection Report

58_GS_1302_02 Gulfstream Permit Approval Form

Other Documents:

29 CFR 1929, Subpart P Excavations, Trenching, and Shoring

ATTACHMENTS

Attachment No. Attachment Title

Attachment 01 Gulfstream Excavation Checklist

Attachment 02 Gulfstream Excavation Daily Inspection ReportAttachment 03 Underground Pipeline Probing Procedure

Attachment 04 Competent Person ResponsibilitiesAttachment 05 Excavation Detail Sketch

Attachment 06 Shoring for Trenches

Attachment No. Attachment Title

Attachment A Guide to Protective Systems

Attachment B Excavating in Type C SoilAttachment C Excavating in Type B Soil



http://osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10930

Excavation must comply with one of the following three options:

OPTION 1: §1926.652(b)(2) which requires Appendices A and B to be followed.

OPTION 2: §1926.652(b)(3), which requires other tabulated data (see definition) to be followed.

OPTION 3: §1926.652(b)(4), which requires the excavation to be designed by a registered professional engineer

Is the excavation more than 5 feet deep?

Is there potential for

cave-in?

Is the excavation entirely in stable rock?

Excavation may be made with vertical sides.

Excavation must be sloped, stored or shielded.

SLOPING selected as the method of protection.

SHORING or SHIELDING selected as the method of protection.

Will soil classification be made in accordance with §1926.652(b)?

Soil classification is required when shoring or shielding is used.

Excavation must comply with §1926.652(b)(1), which requires a slope of 1-1/2H: 1V (34 degrees)

OPTON 1: §1926.652(c)(1), which requires that Appendices A and C be followed (e.g., timber shoring).

OPTON 2: §1926.652(c)(2), which requires that manufacturer’s data be followed (e.g., hydraulic shoring, trench jacks, air shores, and shields).

OPTON 3: §1926.652(c)(3), which required tabulated data (see definition) to be followed (e.g., any system as per the tabulated data).

OPTON 4: §1926.652(c)(4), which requires the excavation to be designed by a registered professional engineer

Yes

No

No

No

Yes

Yes

Yes No

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Attachment A - A guide to selection of Protective Systems for use in excavations 20 feet or less in depth. NOTE: If excavation is more than 6 feet deep and personnel will be working within 6 feet of excavation, Elevated Work Standards (Working at Heights) apply.



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Attachment B – Excavating in Type C Soil



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Attachment C – Excavating in Type B Soil

All benched excavations 20 feet or less in depth shall have a maximum allowable slope of 1:1 and maximum bench dimensions as follows:

This bench allowed in cohesive soil only.

This bench allowed in cohesive soil only.

