March 2, 2018

To: Cured-In-Place Pipe (CIPP) Relining Contractors

RE: CITY OF GRAND FORKS REQUEST FOR QUOTE FOR CIPP RELINING CONTRACTORS

1.0 INTRODUCTION

The City of Grand Forks is requesting quotes to reline the sanitary sewer pipes listed in Table 1. The liner shall be smooth, hard and strong and have a chemically inert interior surface that closely follows the contours of the host pipe.

Table 1 – Description of WorkSection Location Pipe

MaterialPipe Size

(mm)Approx.

Length ofPipe (m)

Number ofServices

Optional Work

1 Sunshine Way A/C 150 105 2 No

2

Back lanebetween (9th

and 10th StreetandImmediatelySouth of theCrowsnestHighway)

Vit Clay 200 100 9

33rd Street (from75th Ave toMarket Ave)

A/C 200 245 5 Yes

1.1 APPLICABLE STANDARDS

The relining, testing and inspection is to be completed according to the latest version of the following standards:

ASTM D-5813 - Standard Specification for Cured-In-Place Thermosetting Resin Sewer PipeASTM F-1216 - Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing

of a Resin-Impregnated Tube,ASTM F-1743 - Standard Practice for Rehabilitation of Existing Pipelines and Conduits by Pulled-in-Place Installation

of Cured-in-Place Thermosetting Resin Pipe (CIPP)

Additional material testing standards that will apply are as follows:

ASTM D-790 - Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics,

No

2.0 SCOPE OF WORK AND SCHEDULE

The work required by the project shall consist of furnishing all labour, equipment, materials, supervision, andperforming all work necessary to rehabilitate the gravity sewer pipes identified in Table 1. The work shall consist of,but not necessarily be limited to, performing the following work tasks:

· Design CIPP lining according to the above noted ASTM standards· Sewer line cleaning· Sewage flow control and bypass· Undertake point repairs as necessary by trenchless methods· Cured-in-place-pipe rehabilitation· Suitable finishing at the inlet/outlet manholes to provide a neat finish (see Fit/Finish section)· Site clean up

The Work must be completed by June 29, 2018 but preference will be given to Contractors that are able to complete the Work by May 15, 2018. The cost difference, if any, for expediting the Work to occur earlier must be identified in the Quote.

2.1 LOCATION OF WORKRefer to Table 1 and the attachments.

2.2 THE TUBEThe Tube shall be supplied according to the above noted ASTM standards. The Tube shall consist of one or more layers of flexible, needled felt or an equivalent woven and/or non-woven material capable of carrying resin, withstanding installation pressures and curing temperatures, and compatible with the resin system used. Seams in the Tube shall be stronger than the non-seamed material.

The wet out Tube shall have a uniform thickness that when compressed at installation pressures will meet or exceed the Design thickness and shall be sized so that when installed will tightly fit the internal circumference and length of the original pipe (dimensions to be confirmed by the Contractor). Allowance should be made for circumferential stretching during installation. Overlapped layers of material in longitudinal seams that cause lumps in the final product shall not be utilized.

The outside layer of the Tube (before wet out) shall be coated with an impermeable, flexible membrane that will contain the resin and facilitate monitoring of resin saturation during the resin impregnation (wet out) procedure.

The Tube shall be homogeneous across the entire wall thickness containing no intermediate or encapsulated elastomeric layers. No material shall be included in the Tube that may cause delamination in the cured CIPP. No dry or unsaturated layers shall be evident.

The wall colour of the interior pipe surface of CIPP after installation shall be a light reflective color so that a clear detailed examination with closed circuit television inspection equipment may be made.

The outside of the Tube shall be marked for distance at regular intervals along its entire length, not to exceed 2 metres. Such markings shall include the Manufacturers name or identifying symbol.

No cuts, tears or abrasions shall occur during handling. The City may inspect the Tube before it is placed into the host pipe.

2.3 RESIN/CATALYST

The resin system shall be a corrosion resistant polyester, vinyl ester, or epoxy and catalyst system that when properlycured within the tube composite meets the requirements of ASTM F1216 and ASTM F1743. The resin shall not containfillers or additives, except those required for viscosity control, fire retardant, modulus enhancement, chemicalresistance, or extension of pot life. Thixotropic agents that will not interfere with visual inspection may be added forviscosity control. Resins may contain pigments, dyes, or colors that do not interfere with the cured-in-place-pipe orits required structural properties.

3.0 DESIGN CRITERIA

Design criteria are defined in Table 2. The CIPP design shall assume no bonding to the original pipe wall. Live loadratings are based on the American Association of State Highway and Transportation Officials (AASHTO) code.

Table 2: CIPP Design CriteriaPipe Diameter Refer to Table 1Pipe Length (approx. - Contractor to confirm) Refer to Table 1Pipe Slope unknownPipe Ovality Assume up to 3%. To be confirmed

prior to installation.Live Load H20 (AASHTO)Structural Design Requirement Full Structural ReplacementFactor of Safety 2Design Life 50 years

3.1 MECHANICAL PROPERTIESThe installed cured-in-place-pipe shall meet the following minimum requirements:

· Flexural Strength (ASTM D790) 31 MPa (4,500 psi)· Flexural Modulus (ASTM D790) 1724 MPa (250,000 psi)· Heat Distortion Temperature 70° C· Final pipe smoothness to be equal to or better than a Manning friction coefficient of n=0.01. If this is not

achievable include finished friction coefficient with submittal.

4.0 SITE WORK

4.1 SITE PREPARATIONThe City will locate and designate all available manhole access points for the work, and provide rights of access onpublic property for the work.

If a street must be closed to traffic the Contractor must communicate that need to the City no less than 2 workingdays prior to the construction. Road closure should be kept to a minimum, only as necessary to facilitate the handlingand installation of the tube and to allow sewage diversion. The City shall undertake the actions necessary to diverttraffic for the mutually agreed time period at no cost to the Contractor.

The City will also provide free access to water hydrants for cleaning, inversion and other work items requiring water.All connections to hydrants must be made via the City supplied backflow prevention device.

4.2 NOTIFICATIONS and SERVICE INTERRUPTIONSThe Contractor shall hand deliver notices at least 48 hours in advance of interrupting services to any homes andadvise the same home owners when service has been restored. In no case, shall services be interrupted for morethan one 8 hour period.

4.3 SEWAGE DIVERSION

The Contractor will be responsible for diverting sewage flows from the manholes during the duration of the gravitymain rehabilitation. Protection of individual service connections from flooding and backing up is to be of upmostpriority.

The Contractor is wholly responsible for protecting private property, public property and the environment resultingduring the work.

4.4 CLEANING

It shall be the responsibility of the Contractor to remove all debris that is located within the sewer pipe and disposeof the debris in accordance with all applicable laws and regulations.

4.5 SPOT REPAIRS

The Contractor will flush all the sections of gravity sewer main, cut out roots obstructing the pipe and prepare a CCTVvideo prior to beginning the work. The Contractor shall be responsible for reviewing the CCTV report and identifyany conditions which may prevent proper installation of the CIPP. If the pre-inspection video reveals an obstruction,such as a dropped joint or a collapse that will inhibit the installation process, then the City must be immediatelycontacted for review. The repair of such an obstruction shall be the responsibility of the City.

4.6 MATERIAL SAMPLING AND TESTING

Sampling - The Contractor shall prepare at least two (2) CIPP samples from the project. Samples shall beprepared/collected in accordance with ASTM D-5813 and ASTM F1216 or ASTM F-1743 as appropriate.

4.7 POST INSTALLATION CLOSED CIRCUIT TELEVISION (CCTV) INSPECTION AND PHOTOGRAPHS

After the CIPP work is complete, the Contractor shall provide the City with a video and still photographs showingcondition of the liner. The video must show the entire length of the CIPP including the fit and finish at each manholeand service connection.

Four photographs (invert, obvert, right springline, and left springline) are to be supplied for each connection betweena length of CIPP and manhole barrel. The photographs must clearly show the fit and finish between the CIPP and themanhole barrel.

5.0 QUOTE SUBMITTALS

Quotes provided are to include:

1) Firm all-inclusive turnkey price for the Cured-In-Place pipe relining of the pipe (including breakout ofeach optional relining section cost and excluding cost of material testing),

2) Price for material testing,3) Cost for expediting work to occur in 2017 (if applicable), and,4) Construction schedule with a breakdown for site preparation/setup, duration of sewage diversion, CIPP

installation, commissioning and site cleanup and demobilization.

Complete submittals are to be submitted via email to: Jeremy Clowes, P.Eng

Water Resources Engineerjclowes@urbansystems.ca

By 2:00:00pm PST, March 23, 2018.

All questions and enquiries are to be directed to the undersigned.

Yours truly,

Jeremy Clowes, P.EngWater Resource Engineer

Attachments:1) Site Location Maps

Figure 1: Sunshine Way Pipe

Pipe to be lined

Figure 2: Back lane between 9th and 10th Street (Immediately south of Crowsnest Highway)

Pipe to be lined

Figure 3: 3rd Street from 75 Avenue to Market Avenue

Pipe to be lined