WRC Sewage System Maintenance _ Rehabilitation Specs (1).docx

Thermal Cured in Place Pipe – 6 pages

PART 1 General

1.01 SUMMARY

It is the intent of this specification to provide for the reconstruction of sewer pipes by the use of the Cured-in-Place Pipe (C.I.P.P.) process utilizing the trenchless method of installation of a resin- impregnated, flexible tube which is inverted into the existing sewer by hydrostatic head or air pressure and cured by means of heated water or air (WRC approval only). When cured, the finished sewer lining shall be tight fitting and continuous from end to end.

1.01.01 Referenced Specifications:

1.01.01.01 CCTV Inspection Sewer

1.01.01.02 Sewer Cleaning

1.01.01.03 Sewer Pipe Joint Testing

1.01.01.04 Sewer Pipe Joint Sealing

1.01.01.05 Chemical Sealing (Grout) Material

1.01.01.06 By-Pass Pumping

1.01.01.07 Manhole and Pipe Rehabilitation and Spray Lining

1.02 QUALITY CONTROL

1.02.01 All work for this section shall conform to the applicable portions of the latest Standard Specifications:

1.02.01.01 ASTM D 5813 – 04 (2018)

1.02.01.02 ASTM F 1216 – 24a (including Appendix X1)

1.02.01.03 ASTM F 2019-22

1.02.01.04 ASTM F 1743 – 25

1.02.02 However, where the requirements of ASTM D 5813, ASTM F 1216, ASTM F 2019 or ASTM D 1743 conflict with the requirements of this section, this section shall govern.

1.03 SUBMITTALS

1.03.01 CCTV Inspection Sewer.

1.03.01.01 A CCTV inspection of the sewer before conditions and after conditions including the restored connections shall be completed per the CCTV Inspection Sewer specifications and turned over to the Owner and become their property.

1.03.02 Material Test

1.03.02.01 Material test shall be furnished to the Owner for review and approval prior to beginning the rehabilitation work, satisfactory written guarantee of compliance with the standards specifications for all materials, techniques, and installation methods being used in the rehabilitation process.

1.03.03 CURE PLAN

1.03.04 BY-PASS PUMPING PLAN

1.03.04.01 Submit a detailed sewer bypass pumping plan to WRC for review fifteen (15) days prior to the beginning of work per the By-Pass Pumping specifications.

1.03.05 Request for Deviation

1.03.05.01 Any deviation in this specification or reference specifications must have prior approval from WRC.

1.04 DESIGN CONSIDERATIONS

1.04.01 Treat the pipe as full deteriorated host pipe always for your design.

1.04.02 Minimum CIPP Physical Properties:

1.04.03 Poisson’s ratio = 0.30

1.04.04 Safety Factor = 2.0

1.04.05 Soil Density = 130 lbs./cft

1.04.06 Soil Modulus

1.04.06.01 700 psi for pipe inverts up to and including 15 feet deep.

1.04.06.02 1,000 psi for pipe inverts greater than 15 feet deep.

1.04.07 Surcharged Loading of HS-20 when any part of the sewer is under any roadway and E-80 when under any railroad.

1.05 The AWARDED VENDOR(S) shall determine the liner thickness and resin quantity per ASTM F 1216, Appendix X1.3.2 for the Fully Deteriorated Pressure Pipe condition and shall follow the requirements specified in this section. These detailed calculations shall provide the input data as well as the actual calculation for equations X1.1, X1.3, X1.4 and X1.7 of Appendix X1. of ASTM F1216. The design submittal shall also clearly identify the physical properties used for design and be sealed by a licensed Professional Engineer. These physical properties shall be the basis for acceptance of the final product.

PART 2 PRODUCTS

2.01 FELT LINER TUBE

2.01.01 The Tube shall consist of one or more layers of flexible, needled felt or an equivalent nonwoven material. The material shall be capable of carrying the specified resin, be able to withstand installation pressures and curing temperatures, and be compatible with the resin used.

2.01.02 The outer Tube coating shall consist of a translucent elastomer that allows for visual inspection and verification of proper resin impregnation. To help with this visual inspection a dye shall be placed in the resin and the color should be uniform and must be approved by WRC. The plastic coating shall hold the resin inside the Tube without leakage, accommodate installation, and stretch to the size and shape of the existing sewer, and shall not delaminate before, during, or after curing.

2.01.03 The Tube shall have a uniform thickness that when compressed at installation pressure will meet or exceed the design thickness. The thickness of the Tube shall be calculated based upon the resin system values given in this Section. The minimum roller gap shall be two times the design thickness plus the felt thickness.

2.01.04 The CIPP wall thickness shall be calculated from the equation in ASTM F 1216, Appendix X1, based upon the parameters given in this Section. The minimum CIPP wall thickness shall be not less than the value calculated by the equation. Any layers of the tube that are not saturated with resin and totally cured shall not be included in the CIPP wall thickness. The Tube shall be fabricated to a size that when installed will tightly fit the internal circumference of the conduit to be lined as specified by the Engineer. Allowance for circumferential stretching of the pipe during insertion shall be made as per manufacturer’s recommendations.

2.01.05 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 tube shall be constructed to withstand installation pressures and have sufficient strength to bridge missing pipe while meeting or exceeding the design wall thickness at all pipe location during installation conditions and pressures.

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

2.01.07 Seams in the Tube shall be stronger than the unseamed felt. Where the length requires joining along the circumference of the Tube, the sewer joint shall not be perpendicular to the long axis but spirally formed and sewn.

2.01.08 The outside of the Tube shall be marked for the distance at regular intervals along its entire length, not to exceed five (5) feet. Such markings shall include the manufacturer’s name and identifying symbol.

2.01.09 The length of the Tube shall be deemed necessary by the AWARDED VENDOR(S) to effectively carry out the insertion and seal the pipe at the inlet and outlet points. The AWARDED VENDOR(S) shall verify the lengths in the field before cutting the Tube to length. Lengths of sewer can be lined over one or more access points as determined in the field by the AWARDED VENDOR(S) and approved by the ENGINEER.

2.02 RESIN

2.02.01 Resin shall be enhanced polyester, vinyl ester, or epoxy. Resin selected shall be resistant to the chemical composition of the sewage.

2.02.02 Resin with higher than minimum physical properties may be required for AWARDED VENDOR(S) to meet minimum field cured physical properties of the completed liner.

2.02.03 The resin shall be thermosetting resin that is compatible with the lining process and shall meet the requirements of ASTM F 1216 except as otherwise specified in this section. The resin shall be able to cure in water with an initiation temperature for cure of not less than 120º F. The cured resin/felt system shall be suitable for the expected conditions within the existing sanitary sewer.

2.02.04 If an epoxy resin is used and there is water present in the pipe a pre-liner must be used.

2.02.05 Fiberglass reinforced system should be about 50% resin and 50% fiberglass by volume where the rest are about 85% resin to 15% fabric by volume.

2.02.06 Alternate resins shall only be allowed per 1.03.05 of this specification.

2.03 FIELD CURED LINER

2.03.01 The completed liner as installed and fully cured in place shall meet the following minimum physical properties for short term flexural modulus and flexural strength given per 1.04.02 of this specification.

2.03.02 The layers of the cured CIPP shall be uniformly bonded. It shall not be possible to separate any two layers with a probe or point of a knife blade so that the layers separate cleanly or the probe or knife blade moves freely between the layers. If separation of the layers occurs during testing of field samples, new samples will be cut from the work. Any reoccurrence may cause rejection of the work.

PART 3 EXECUTION

3.01 SAFETY

3.01.01 The AWARDED VENDOR(S) shall carry out his operations in strict accordance with all OSHA, MIOSHA, traffic and manufacturer’s safety requirements.

3.02 CLEANING OF PIPELINES

3.02.01 The AWARDED VENDOR(S) shall follow WRC’s Sewer Cleaning specification.

3.03 PRE-REHABILITATION INSPECTION OF PIPELINE

3.03.01 The AWARDED VENDOR(S) shall follow WRC’s CCTV Inspection Sewer specification. The location of any conditions which may prevent proper installation of the lining materials into the pipelines shall be noted and reported immediately to WRC and corrected by section 3.05.

3.04 BY-PASS PUMPING

3.04.01 The AWARDED VENDOR(S) shall follow WRC’s By-Pass Pumping specification.

3.05 LINE OBSTRUCTIONS

3.05.01 It shall be the responsibility of the AWARDED VENDOR(S) to clear the line of any obstructions such as solids, dropped joints, protruding branches, roots, or broken pipe that will prevent proper insertion of the liner. If inspection reveals an obstruction that cannot be removed by conventional cleaning equipment, then the obstruction shall be removed by equipment operating with the pipeline.

3.05.02 Services shall not protrude more than ¼ inch on any size sewer line. Anything protruding more than that shall be ground down as flush as possible with the wall of the sanitary sewer. Grinding shall be done with equipment operation inside of the sewer and shall not cause damage to the sewer or the service being ground.

3.05.03 If the protruding service is in such condition that grinding is not possible or in condition that such a repair cannot be done from the inside, then the AWARDED VENDOR(S) shall inform WRC that a spot repair is necessary and provide all the details. Once WRC gives its approval the AWARDED VENDOR(S) shall make a spot repair excavation, to uncover, remove, and repair the obstruction. The use of a flail type reamer to remove protruding services is not allowed.

3.06 INSTALLATION OF RESIN IMPREGNATED TUBE

The AWARDED VENDOR(S) shall designate a location where the uncured resin in the original containers and the un-impregnated liner will be resin impregnated prior to installation. The AWARDED VENDOR(S) shall allow WRC’s personnel to inspect all materials and procedures and will not commence with any work without WRC’s personnel on site unless given written permission by WRC. A resin and catalyst system compatible with the requirement of section 02.02 shall be used. The quantities of the liquid thermosetting materials shall be per manufacturer’s standards to provide the cured liner properties specified. Sufficient resin shall be used to fill the volume of air voids in the liner with additional allowance for polymerization, shrinkage and loss of resin through cracks and irregularities in host pipe wall. The AWARDED VENDOR(S) shall ensure that the proper amount of resin is uniformly distributed throughout the entire length of the Tube.

3.06.01 The wetting out, installation, and curing of the resin impregnated tube shall be in accordance with ASTM F 1216. The Tube shall be inserted through an existing manhole or other approved access by means of an inversion process, the application of a hydrostatic head sufficient to fully extend the liner to the next designated access point, or any other means approved by WRC.

3.06.02 The process will be adjusted as necessary to ensure a complete lining without over stressing or tearing the lining; and with sufficient pressure to hold the liner snug to the pipe wall and to produce dimples at side connection and flared ends at the entrance and exit access points. The use of a lubricant is recommended and if used, such lubricant shall be compatible with the rehabilitation process.

3.06.03 The manufacturer’s standards shall be closely followed during the elevated curing temperature so as not over stress the felt fiber and cause damage or failure of the liner prior to cure.

3.07 CURING

3.07.01 The AWARDED VENDOR(S) shall submit a cure plan for approval by WRC. No work shall commence until the AWARDED VENDOR(S) gets WRC’s approval.

3.07.02 Hot water or heat cured liners are required for the full length of the liner. Ambient cure liners may be used for spot repair liners or can be substituted for a full-length liner only with approval by WRC.

3.07.03 After installation of the resin impregnated liner is completed the AWARDED VENDOR(S) shall supply a suitable heat source and water recirculation equipment when necessary to cure the liner. The equipment shall be capable of delivering hot water to the far end of the liner through a hose, which has been perforated per manufacturer’s recommendations, to uniformly raise the water temperature in the entire pipe above the temperature required to affect a cure of the resin. This temperature shall be determined by the resin/catalyst system employed.

3.07.04 The heat source shall be fitted with suitable monitors to gauge the temperature of the incoming and outgoing circulating water/air. Thermocouples shall be placed at the end of the Tube and between the Tube and existing pipe at the access points to determine the temperature of the cure. Temperature in the line during the cure period shall not be less than 150º F or more than 200º F as measured at the heat exchanger return line.

3.07.05 Initial cure shall be deemed to be completed when inspection of the exposed portions of the liner appears to be hard, and sound and the thermocouples indicate that an exotherm has occurred. The cure period shall be of a duration recommended by the resin manufacturer, as modified for the lining process, during which time the recirculation of the water/air and cycling of the heat exchanger to maintain the temperature in the liner continues.

3.08 COOL-DOWN

3.08.01 The AWARDED VENDOR(S) shall cool the CIPP to a temperature below 90º F before relieving the static pressure in the liner. Cool-down may be accomplished by the introduction of cool water into the liner to replace water being drained from the downstream end. Care shall be taken in the release of the static head such that a vacuum will not be developed that could damage the newly installed liner.

3.09 FINISH

3.09.01 The cured liner shall be continuous over the entire length of an insertion run and be as free as commercially practicable from visual defects such as excessive wrinkling, foreign inclusions, dry spots, pinholes and delamination. The lining shall be impervious and free of any leakage.

3.09.02 Any defects which will affect the integrity of the liner, or any deficiencies in required strengths or thicknesses, shall be repaired or removed and replaced at the AWARDED VENDOR(S)’S expense, in a manner acceptable to WRC.

3.10 SEALING LINER AT THE ENDS

3.10.01 If the lining fails to make a tight seal, the AWARDED VENDOR(S) shall apply a seal at that point. The seal shall be of a resin mixture compatible with the installed liner.

3.11 BRANCH OR SERVICE CONNECTIONS

3.11.01 After the liner has been cured, the AWARDED VENDOR(S) shall reconnect the existing service connections. This shall generally be done without excavation and in the case of non-man entry pipes, from the interior of the pipeline by means of a television camera and cutting device that re-establishes them to operational capacity. After cutting open the service connections, the AWARDED VENDOR(S) shall use a brushing device from the interior of the pipeline by means of a television camera that touches-up the full circumference of the service connection to a minimum of 95% open and to eliminate any rough or jagged edges plus be smooth in the flow line.

3.11.02 Reconnection of services shall begin immediately after curing of the CIPP has been completed. No service shall be interrupted for more than 12 hours unless otherwise approved by WRC.

3.12 POST REHABILITATION TELEVISION INSPECTION

3.12.01 The completed sewer shall be television inspected per the CCTV Inspection Sewer specification by the AWARDED VENDOR(S) after completion of the service connections.

3.13 CIPP PIP TESTING

3.13.01 Testing in accordance with ASTM F 1216 (including appendixes), ASTM D 790, ASTM F 1743, ASTM F 2019 and ASTM D 5813 will be conducted and must be witnessed by WRC. Air test or hydrostatic tests must be done prior to re-establishing service connections, and all other tests shall be done within a month of the installation by the AWARDED VENDOR(S) at no additional cost to WRC.

3.13.02 The AWARDED VENDOR(S) shall prepare samples of the liner for each section of sewer lined in accordance with Section 8 of ASTM F 1216. Samples shall be labeled for date, diameter, section of sewer, and delivered to WRC for future testing. When tested, each sample shall meet the physical properties for flexural modulus and flexural strength used in the design calculations.

3.13.03 Air testing on isolated sections of sewer (2-3 feet in length) shall be required if post-rehabilitation inspection indicates leaks in the liner. The AWARDED VENDOR(S) shall remove and replace or repair any defects in the installed liner to the satisfaction of WRC at no additional cost.

3.14 TRAFFIC CONTROL

3.14.01 During the entire rehabilitation process, the AWARDED VENDOR(S) shall provide all necessary barricades, signs, flagmen, minor traffic devices, etc., to maintain both vehicular and pedestrian traffic and if not possible all necessary barricades, signs, minor traffic devices, etc. for the road and sidewalk closure per the Michigan Manual of Uniform Traffic Control Devices.

3.15 CLEAN UP

3.15.01 Upon completion of the installation work and after required testing indicates the lining(s) are acceptable, the AWARDED VENDOR(S) shall restore the project area affected by his operation to its original condition.

END OF SECTION

UV Cured in Place Pipe Liner

3.16 SUMMARY

It is the intent of this specification to provide for the reconstruction of sewer pipes by the use of the Cured-in-Place Pipe (C.I.P.P.) process utilizing the trenchless method of installation of a resin-impregnated, flexible tube which is inverted into the existing sewer by hydrostatic head or air pressure and cured by means of ultraviolet light. When cured, the finished sewer lining shall be tight fitting and continuous from end to end.

3.17 REFERENCED SPECIFICATIONS

3.17.01.01 CCTV Inspection Sewer

3.17.01.02 Sewer Cleaning

3.17.01.03 Sewer Pipe Joint Testing

3.17.01.04 Sewer Pipe Joint Sealing

3.17.01.05 Chemical Sealing (Grout) Material

3.17.01.06 By-Pass Pumping

3.17.01.07 Manhole and Pipe Rehabilitation and Spray Lining

3.18 QUALITY CONTROL

3.18.01 All work for this section shall conform to the applicable portions of the latest Standard Specifications:

3.18.01.01 ASTM D 5813 – 04 (2018)

3.18.01.02 ASTM F 1216 – 24a (including all Appendices)

3.18.01.03 ASTM F 2019-22

3.18.01.04 ASTM D 3567

3.18.01.05 ASTM D 790

3.18.01.06 ASTM D 2990

3.18.01.07 DIN EN 761

3.18.01.08 APS Water Porosity Standard

3.18.02 However, where the requirements of ASTM F1216, ASTM D5813, ASTM F2019, ASTM D3567, ASTM D790, ASTM D2990, DIN EN 761 or APS Water Porosity Standard conflict with the requirements of this section, this section shall govern.

3.18.03 Submittals

3.18.03.01 CCTV Inspection Sewer.

1.18.03.01.01 A CCTV inspection of the sewer before conditions and after conditions including the restore connections shall be completed per the CCTV Inspection Sewer specifications and turned over to the Owner and become their property.

3.18.03.02 Material Test

1.18.03.02.01 Material test shall be furnished to the Owner for review and approval prior to beginning the rehabilitation work, satisfactory written guarantee of compliance with the standards specifications for all materials, techniques, and installation methods being used in the rehabilitation process.

3.18.03.03 By-Pass Pumping Plan

1.18.03.03.01 Submit a detailed sewer bypass pumping plan to WRC for review fifteen (15) days prior to the beginning of work per the By-Pass Pumping specifications.

3.18.03.04 Request for Deviation

1.18.03.04.01 Any deviation in this specification or reference specifications must have prior approval from WRC.

3.18.04 Design considerations

3.18.04.01 Treat the pipe as a fully deteriorated host pipe always for your design.

3.18.04.02 Minimum CIPP Physical Properties:

3.18.04.03 Enhancement factor (K) = 7.0

3.18.04.04 An ovality (q) = 0%

3.18.04.05 Poisson’s (v) ratio = 0.30

3.18.04.06 Safety Factor = 2.0

3.18.04.07 Soil Density = 130 lbs./cft

3.18.04.08 Soil Modulus

1.18.04.08.01 700 psi for pipe inverts up to and including 15 feet deep. 1.18.04.08.02 1,000 psi for pipe inverts greater than 15 feet deep.

3.18.04.09 Surcharged Loading of HS-20 when any part of the sewer is under any roadway and E-80 when under any railroad.

3.18.04.10 The CIPP design shall assume no bonding to the original pipe wall.

3.18.05 The AWARDED VENDOR(S) shall determine the liner thickness and resin quantity per ASTM F 1216, Appendix X1.3.2 for the Fully Deteriorated Pressure Pipe condition and shall follow the requirements specified in this section. These detailed calculations shall provide the input data as well as the actual calculation for equations X1.1, X1.3, X1.4 and X1.7 of Appendix X1. of ASTM F1216. The design submittal shall also clearly identify the physical properties used for design and be sealed by a licensed Professional Engineer. These physical properties shall be the basis for acceptance of the final product.

PART 4 PRODUCTS

4.01 FIBERGLASS LINER TUBE

4.01.01 The fabric tube, resin and external pre-liners shall produce a CIPP that meets the requirements of ASTM F 2019-11.

4.01.02 The glass fiber tubing shall be seamless and spirally wound, including an exterior and interior film must be used for resin control (to prevent resin migration and contamination). The exterior film will be provided with a UV light blocker foil.

4.01.03 The Tube shall consist of a seamless, spirally wound fiberglass that is flexible and has strain values (expandable) of up to ten (10) percent. The tube will not have a longitudinal seam, including a stitched seam, stitch-free weld or bond, or stitch-free overlap. The tube shall be constructed to withstand installation pressures and have sufficient strength to bridge missing pipe.

4.01.04 The inner film and outer film must both be certified as styrene gas barriers. The inner liner film shall be removed running the installation process unless it is a permanent part of the system and is made an integral part of the carrier tube by bonding of fusing the carrier tube.

4.01.05 The Tube shall have a uniform thickness that when compressed at installation pressure will meet or exceed the design thickness. The thickness of the Tube shall be calculated based upon the resin system values given in this specification. The minimum roller gap shall be two times the design thickness plus the felt thickness.

4.01.06 The CIPP wall thickness shall be calculated from the equation in ASTM F 1216, Appendix X1, based upon the parameters given in this specification. The minimum CIPP wall thickness shall be not less than the value calculated by the equation. Any layers of the tube that are not saturated with resin and totally cured shall not be included in the CIPP wall thickness.

4.01.07 The Tube shall be fabricated to a size that when installed will tightly fit the internal circumference of the conduit to be lined as specified by WRC. Allowance for circumferential stretching of the pipe during insertion shall be made as per manufacturer’s recommendations.

4.01.08 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 tube shall be constructed to withstand installation pressures and have sufficient strength to bridge missing pipe while meeting or exceeding the design wall thickness at all pipe location during installation conditions and pressures.

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

4.01.10 The glass fiber Tube shall be saturated with the appropriate resin using a resin bath to allow for the lowest possible amount of air entrapment. Vacuum-suction impregnation methods are not allowed due to the introduction of air using this method. The line will then be formed into a spirally wound shape for the purpose of being seamless in the cured state

4.01.11 The outside of the Tube shall be marked for the distance at regular intervals along its entire length, not to exceed five (5) feet. Such markings shall include the manufacturer’s name and identifying symbol.

4.01.12 The length of the Tube shall be deemed necessary by the AWARDED VENDOR(S) to effectively carry out the insertion and seal the pipe at the inlet and outlet points. The AWARDED VENDOR(S) shall verify the lengths in the field before cutting the Tube to length. Lengths of sewer can be lined over one or more access points as determined in the field by the AWARDED VENDOR(S) and approved by the ENGINEER.

4.02 RESIN

4.02.01 Resin shall be polyester npg or vinyl ester. Resin selected shall be resistant to the chemical composition of the sewage.

4.02.02 To help with visual inspection of the resin once the liner is installed and before it is cured a dye, color approved by WRC, shall be placed in the resin and the color should be uniformed.

4.02.03 Resin with higher than minimum physical properties may be required for AWARDED VENDOR(S) to meet minimum field cured physical properties of the completed liner.

4.02.04 The resin shall be UV curing resin that is compatible with the lining process and shall meet the requirements of ASTM F 1216 except as otherwise specified in this section. The cured resin/fiberglass system shall be suitable for the expected conditions within the existing sanitary sewer.

4.02.05 Alternate resins shall only be allowed per 1.02.03.04.01 of this specification.

4.03 FIELD CURED LINER

4.03.01 The completed liner as installed and fully cured in place shall meet the following minimum physical properties for short term flexural modulus and flexural strength given per 1.02.04 of this specification.

4.03.02 The layers of the cured CIPP shall be uniformly bonded. It shall not be possible to separate any two layers with a probe or point of a knife blade so that the layers separate cleanly or the probe or knife blade moves freely between the layers. If separation of the layers occurs during testing of field samples, new samples will be cut from the work. Any reoccurrence may cause rejection of the work.

PART 5 EXECUTION

5.01 SAFETY

5.01.01 The AWARDED VENDOR(S) shall carry out his operations in strict accordance with all OSHA, MIOSHA, traffic and manufacturer’s safety requirements.

5.02 CLEANING OF PIPELINES

5.02.01 The AWARDED VENDOR(S) shall follow WRC’s Sewer Cleaning specification.

5.03 PRE-REHABILITATION INSPECTION OF PIPELINE

5.03.01 The AWARDED VENDOR(S) shall follow WRC’s CCTV Inspection Sewer specification. The location of any conditions which may prevent proper installation of the lining materials into the pipelines shall be noted and reported immediately to WRC and corrected by section 3.05.

5.04 BY-PASS PUMPING

5.04.01 The AWARDED VENDOR(S) shall follow WRC’s By-Pass Pumping specification.

5.05 LINE OBSTRUCTIONS

5.05.01 It shall be the responsibility of the AWARDED VENDOR(S) to clear the line of any obstructions such as solids, dropped joints, protruding branches, roots, or broken pipe that will prevent proper insertion of the liner. If the inspection reveals an obstruction that cannot be removed by conventional cleaning equipment, then the obstruction shall be removed by equipment operating with the pipeline.

5.05.02 Services shall not protrude more than ¼ inch on any size sewer line. Anything protruding more than that shall be ground down as flush as possible with the wall of the sanitary sewer. Grinding shall be done with equipment operation inside of the sewer and shall not cause damage to the sewer or the service being ground.

5.05.03 If the protruding service is in such condition that grinding is not possible or in condition that such a repair cannot be done from the inside, then the AWARDED VENDOR(S) shall inform WRC that a spot repair is necessary and provide all the details. Once WRC gives its approval the AWARDED VENDOR(S) shall make a spot repair excavation, to uncover, remove, and repair the obstruction. The use of a flail type reamer to remove protruding services is not allowed.

5.06 INSTALLATION FOR RESIN IMPREGNATED TUBE

5.06.01 The AWARDED VENDOR(S) shall designate a location where the uncured resin in the original containers and the un-impregnated liner will be resin impregnated prior to installation. The AWARDED VENDOR(S) shall allow WRC’s personnel to inspect all materials and procedures and will not commence with any work without WRC’s personnel on site unless given written permission by WRC.

5.06.02 The glass fiber tube shall be saturated with the appropriate resin using a resin bath to allow for the lowest possible amount of air entrapment. Vacuum-suction impregnation methods are not allowed due to the introduction of air using this method. The AWARDED VENDOR(S) shall ensure that the proper amount of resin is uniformly distributed throughout the entire length of the Tube.

5.06.03 The wetting out, installation, and curing of the resin impregnated tube shall be in accordance with ASTM F 1216. The Tube shall be inserted through an existing manhole or other approved access by means of a controlled tension winching process sufficient to fully extend the liner to the next designated access point, or any other means approved by WRC.

5.06.04 A Slip sheet shall be installed on the bottom half of the pipe prior to liner insertion, with the purpose of smoothing out the bottom of the liner to increase flow characteristics.

5.06.05 A pre-liner tube or outer film shall be inserted into the pipe prior to inserting the liner, unless it is manufactured on the exterior of the liner. The pre-liner tube shall control resin loss, contamination of the resin by water or other contaminates, and prevent blocked or plugged services and laterals. The pre-liner tube shall be reinforced plastic sheet formed into a tube sized to fit the host pipe and shall be continuous from manhole to manhole.

5.06.06 A constant tension winch should be used to pull the glass fiber liner into position in the pipe. Once inserted, end plugs shall be used to cap each end of the glass fiber tube liner to prepare for pressurizing the liner. The end plugs shall be secured with straps to prevent them from being expelled due to the pressure. Liner restraints shall be used in manholes.

5.06.07 The process will be adjusted as necessary to ensure a complete lining without over stressing or tearing the lining; and with sufficient pressure to hold the liner snug to the pipe wall and to produce dimples at side connections and flared ends at the entrance and exit access points. The use of lubricant is recommended and if used, such lubricant shall be compatible with the rehabilitation process.

5.06.08 The manufacturer’s standards shall be closely followed during the curing so as not to over stress the fiberglass tube and cause damage or failure of the liner prior to cure.

5.07 CURING

5.07.01 The UV light sources shall be assembled according to the manufacturer’s specifications for the liner diameter. For the liner to achieve the required water tightness and specified mechanical properties, the following parameters shall be controlled during the entire curing process, giving WRC a record of the curing parameters over every segment of the entire length of the liner. This demonstrates that the entire liner is cured properly. The recoding will include:

5.07.01.01 Curing Speed

5.07.01.02 Light source working and wattage

5.07.01.03 Inner air pressure

5.07.01.04 Exothermic (curing) temperatures

5.07.01.05 Date and time

5.07.01.06 Length of liner

5.07.02 This will be accomplished using a computer and database that are tamper proof. During the curing process, infrared sensors will be used to record curing data that will be submitted to WRC with a post TV inspection per the specifications for CCTV Inspection Sewer.

5.07.02.01 The parameters for curing speed, inner air pressure and wattage are defined in the Quality Tracker UV curing protocol issued by the manufacturer. The optimal curing speed, or travel speed of the energized UV light sources, is determined for each length of liner based on liner diameter, liner thickness, and exothermic reaction temperature.

5.07.03 The inner film material shall be removed and discarded after curing to provide optimal quality of the final product.

5.07.04 Flushing of the cured fiberglass/UV cured CIPP line (to reduce styrene residual) is not required for fiberglass/UV cured CIPP products that provide 3rd party test results that document styrene residual levels (without flushing) are within acceptable defined levels.

5.08 FINISH

5.08.01 The cured liner shall be continuous over the entire length of an insertion run and be as free as commercially practicable from visual defects such as excessive wrinkling, foreign inclusions, dry spots, pinholes and delamination. The lining shall be impervious and free of any leakage.

5.08.02 Any defects which will affect the integrity of the liner, or any deficiencies in required strengths or thicknesses, shall be repaired or removed and replaced at the AWARDED VENDOR(S)’S expense, in a manner acceptable to WRC.

5.09 SEALING LINER AT THE ENDS

5.09.01 If due to a broken or misaligned pipe at the access point, the lining fails to make a tight seal, the AWARDED VENDOR(S) shall apply a seal at that point. The seal shall be of a resin mixture compatible with the installed liner.

5.10 BRANCH OR SERVICE CONNECTIONS

5.10.01 After the liner has been cured, the AWARDED VENDOR(S) shall reconnect the existing service connections. This shall generally be done without excavation and in the case of non-man entry pipes, from the interior of the pipeline by means of a television camera and cutting device that re-establishes them to operational capacity. After cutting open the service connections, the AWARDED VENDOR(S) shall use a brushing device from the interior of the pipeline by means of a television camera that touches-up the full circumference to a minimum of 95% open and to eliminate any rough or jagged edges plus be smooth in the flow line.

5.10.02 Reconnection of services shall begin immediately after curing of the CIPP has been completed. No service shall be interrupted for more than 12 hours unless otherwise approved by WRC.

5.11 POST REHABILITATION TELEVISION INSPECTION

5.11.01 The completed sewer shall be television inspected per the CCTV Inspection Sewer specification by the AWARDED VENDOR(S) after completion of the service connections.

5.12 CIPP PIP TESTING

5.12.01 Testing in accordance with ASTM F 1216 (including appendixes), ASTM D 790, ASTM F 1743, ASTM F 2019 and ASTM D 5813 will be conducted and must be witnessed by WRC. Air test or hydrostatic tests must be done prior to re-establishing service connections, and all other tests shall be done within a month of the installation by the AWARDED VENDOR(S) at no additional cost to WRC.

5.12.02 The AWARDED VENDOR(S) shall prepare samples of the liner for each section of sewer lined in accordance with Section 8 of ASTM F 1216. Samples shall be labeled for date, diameter, section of sewer, and delivered to WRC for future testing. When tested, each sample shall meet the physical properties for flexural modulus and flexural strength used in the design calculations.

5.12.03 Air testing on isolated sections of sewer (2-3 feet in length) shall be required if post-rehabilitation inspection indicates leaks in the liner. The AWARDED VENDOR(S) shall remove and replace or repair any defects in the installed liner to the satisfaction of WRC at no additional cost.

5.13 TRAFFIC CONTROL

5.13.01 During the entire rehabilitation process, the AWARDED VENDOR(S) shall provide all necessary barricades, signs, flagmen, minor traffic devices, etc., to maintain both vehicular and pedestrian traffic and if not possible all necessary barricades, signs, minor traffic devices, etc. for the road and sidewalk closure per the Michigan Manual of Uniform Traffic Control Devices.

5.14 CLEAN UP

5.14.01 Upon completion of the installation work and after required testing indicates the lining(s) are acceptable, the AWARDED VENDOR(S) shall restore the project area affected by his operation to its original condition.

Folded/Formed Poly Vinyl Chloride – 6 pages

1.01 SUMMARY

It is the intent of this specification to provide for the reconstruction of sewer pipes by the use of folded/formed Poly Vinyl Chloride (PVC) pipe process. When cured, the finished sewer lining shall be tight fitting and continuous from end to end.

1.02 REFERENCED SPECIFICATIONS

1.02.01.01 CCTV Inspection Sewer

1.02.01.02 Sewer Cleaning

1.02.01.03 Sewer Pipe Joint Testing

1.02.01.04 Sewer Pipe Joint Sealing

1.02.01.05 Chemical Sealing (Grout) Material

1.02.01.06 By-Pass Pumping

1.02.01.07 Manhole and Pipe Rehabilitation and Spray Lining

1.03 QUALITY CONTROL

1.03.01 All work for this section shall conform to the applicable portions of the latest Standard Specifications:

1.03.01.01 ASTM D 3567

1.03.01.02 ASTM D 790

1.03.01.03 ASTM D 2990

1.03.01.04 ASTM D 256

1.03.01.05 ASTM D 638

1.03.01.06 ASTM D 2122

1.03.01.07 ASTM 2152

1.03.01.08 ASTM 2444

1.03.01.09 ASTM F 1057

1.03.01.10 ASTM D 1784-20

1.03.01.11 ASTM F 1867

1.03.01.12 ASTM F 1871

1.03.01.13 ASTM F 1947-21a

1.03.01.14 ASTM F 1504-21e1

1.03.02 However, where the requirements of the aforementioned standards conflict with this specification the requirements of this section shall govern.

1.03.03 Submittals

1.03.03.01 CCTV Inspection Sewer.

1.03.03.01.01 A CCTV inspection of the sewer before conditions and after conditions including the restore connections shall be completed per the CCTV Inspection Sewer specifications and turned over to the Owner and become their property.

1.03.03.02 Material Test

1.03.03.02.01 Material test shall be furnished to the Owner for review and approval prior to beginning the rehabilitation work, satisfactory written guarantee of compliance with the standards specifications for all materials, techniques, and installation methods being used in the rehabilitation process.

1.03.03.03 By-Pass Pumping Plan

1.03.03.03.01 Submit a detailed sewer bypass pumping plan to WRC for review fifteen (15) days prior to the beginning of work per the By-Pass Pumping specifications.

1.03.03.04 Request for Deviation

1.03.03.04.01 Any deviation in this specification or reference specifications must have prior approval from WRC.

1.03.03.05 Design considerations

1.03.03.06 Treat the pipe as a fully deteriorated host pipe always for your design.

1.03.03.07 Minimum PVC Physical Properties:

1.03.03.08 Enhancement factor (K) = 7.0

1.03.03.09 An ovality (q) = 3%

1.03.03.010 Poisson’s (v) ratio = 0.30

1.03.03.011 Safety Factor = 2.0

1.03.03.012 Soil Density = 130 lbs./cft

1.03.03.013 Soil Modulus

1.03.03.013.01 700 psi for pipe inverts up to and including 15 feet deep. 1.03.04.08.02 1,000 psi for pipe inverts greater than 15 feet deep.

1.03.03.014 Surcharged Loading of HS-20 when any part of the sewer is under any roadway and E-80 when under any railroad.

1.03.04.15 The design shall assume no bonding to the original pipe wall.

1.03.04 The AWARDED VENDOR(S) shall determine the liner thickness. The design submittal shall also clearly identify the physical properties used for design and be sealed by a licensed Professional Engineer. These physical properties shall be the basis for acceptance of the final product.

PART 2 PRODUCTS

2.01 POLY VINYL CHLORIDE LINER

2.01.01 The liners shall produce a product that meets the requirements of ASTM F 1867 Appendix X1 and ASTM F1871.

2.01.02 The Liner shall have a uniform thickness that will meet or exceed the design thickness.

2.01.03 The Liner shall be fabricated to a size that when installed will tightly fit the internal circumference of the conduit to be lined as specified by WRC. Allowance for circumferential stretching of the pipe during insertion shall be made as per manufacturer’s recommendations.

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

2.01.05 The outside of the Tube shall be marked for the distance at regular intervals along its entire length, not to exceed five (5) feet. Such markings shall include the manufacturer’s name and identifying symbol.

2.01.06 The length of the Liner shall be deemed necessary by the AWARDED VENDOR(S) to effectively carry out the insertion and seal the pipe at the inlet and outlet points. The AWARDED VENDOR(S) shall verify the lengths in the field before cutting the Tube to length. Lengths of sewer can be lined over one or more access points as determined in the field by the AWARDED VENDOR(S) and approved by the ENGINEER.

PART 3 EXECUTION

3.01 SAFETY

3.01.01 The AWARDED VENDOR(S) shall carry out his operations in strict accordance with all OSHA, MIOSHA, traffic and manufacturer’s safety requirements.

3.02 CLEANING OF PIPELINES

3.02.01 The AWARDED VENDOR(S) shall follow WRC’s Sewer Cleaning specification.

3.03 PRE-REHABILITATION INSPECTION OF PIPELINE

3.03.01 The AWARDED VENDOR(S) shall follow WRC’s CCTV Inspection Sewer specification. The location of any conditions which may prevent proper installation of the lining materials into the pipelines shall be noted and reported immediately to WRC and corrected by section 3.05.

3.04 BY-PASS PUMPING

3.04.01 The AWARDED VENDOR(S) shall follow WRC’s By-Pass Pumping specification.

3.05 LINE OBSTRUCTIONS

3.05.01 It shall be the responsibility of the AWARDED VENDOR(S) to clear the line of any obstructions such as solids, dropped joints, protruding branches, roots, or broken pipe that will prevent proper insertion of the liner. If the inspection reveals an obstruction that cannot be removed by conventional cleaning equipment, then the obstruction shall be removed by equipment operating with the pipeline.

3.05.02 Services shall not protrude more than ¼ inch on any size sewer line. Anything protruding more than that shall be ground down as flush as possible with the wall of the sanitary sewer. Grinding shall be done with equipment operation inside of the sewer and shall not cause damage to the sewer or the service being ground.

3.05.03 If the protruding service is in such condition that grinding is not possible or in condition that such a repair cannot be done from the inside, then the AWARDED VENDOR(S) shall inform WRC that a spot repair is necessary and provide all the details. Once WRC gives its approval the AWARDED VENDOR(S) shall make a spot repair excavation, to uncover, remove, and repair the obstruction. The use of a flail type reamer to remove protruding services is not allowed.

3.06 INSTALLATION FOR PVC PIPE LINER

3.06.01 The AWARDED VENDOR(S) shall allow WRC’s personnel to inspect all materials and procedures and will not commence with any work without WRC’s personnel on site unless given written permission by WRC.

3.06.02 The method of installation shall be compatible with the manufacturer’s recommended practices and shall meet ASTM F1867.

3.06.03 The Liner shall be inserted through an existing manhole by means approved by WRC.

3.06.04 The awarded Vendor shall supply steam source equipment. The equipment shall be capable of delivering steam through the lining section to uniformly raise the temperature to effectively form the PVC liner.

3.06.05 The heat source shall be fitted with monitoring equipment to observe the pressure of the outgoing steam supply. Pressure should also be monitored within the manhole during the forming process. Awarded Vendor shall perform monitoring per manufacturer’s recommendation

3.06.06 The liner pipe shall be expanded until it is pressed tightly against the existing pipe wall. If the liner fails to form, the Vendor shall remove the failed liner and replace it with a new liner. Owner is not responsible for cost associated with the replacement of failed liners.

3.06.07 The process will be adjusted as necessary to ensure a complete lining without over stressing or tearing the lining; and with sufficient pressure to hold the liner snug to the pipe wall and to produce dimples at side connections and flared ends at the entrance and exit access points.

3.06.08 The manufacturer’s standards shall be closely followed during the installation so as not to over stress the liner and cause damage or failure of the liner prior to cure.

3.07 FINISH

3.07.01 The cured liner shall be continuous over the entire length of an insertion run and be as free as commercially practicable from visual defects such as foreign inclusions and pinholes. The lining shall be impervious and free of any leakage.

3.07.02 Any defects which will affect the integrity of the liner, or any deficiencies in required strengths or thicknesses, shall be repaired or removed and replaced at the AWARDED VENDOR(S)’S expense, in a manner acceptable to WRC.

3.08 SEALING LINER AT THE ENDS

3.08.01 If due to a broken or misaligned pipe at the access point, the lining fails to make a tight seal, the AWARDED VENDOR(S) shall apply a seal at that point. The seal shall be compatible with the installed liner.

3.09 BRANCH OR SERVICE CONNECTIONS

3.09.01 After the liner has been formed in place, the AWARDED VENDOR(S) shall reconnect the existing service connections. This shall generally be done without excavation and in the case of non-man entry pipes, from the interior of the pipeline by means of a television camera and cutting device that re-establishes them to operational capacity. After cutting open the service connections, the AWARDED VENDOR(S) shall use a brushing device from the interior of the pipeline by means of a television camera that touches-up the full circumference to a minimum of 95% open and to eliminate any rough or jagged edges plus be smooth in the flow line.

3.09.02 The reconnection of services shall begin immediately after forming has been completed. No service shall be interrupted for more than 12 hours unless otherwise approved by WRC.

3.10 POST REHABILITATION TELEVISION INSPECTION

3.10.01 The completed sewer shall be television inspected per the CCTV Inspection Sewer specification by the AWARDED VENDOR(S) after completion of the service connections.

3.11 CIPP PIP TESTING

3.11.01 Testing in accordance with ASTM F 1871, ASTM D 256, ASTM D 638, ASTM D 790, ASTM D 2122, ASTM D 2152, ASTM D 2412, ASTM D 2444 and ASTM D 1057 will be conducted and must be witnessed by WRC. Air test or hydrostatic tests must be done prior to re-establishing service connections, and all other tests shall be done within a month of the installation by the AWARDED VENDOR(S) at no additional cost to WRC.

3.11.02 The AWARDED VENDOR(S) shall prepare samples of the liner for each section of sewer lined. Samples shall be labeled for date, diameter, section of sewer, and delivered to WRC for future testing. When tested, each sample shall meet the physical properties for flexural modulus and flexural strength used in the design calculations.

3.11.03 Air testing on isolated sections of sewer (2-3 feet in length) shall be required if post-rehabilitation inspection indicates leaks in the liner. The AWARDED VENDOR(S) shall remove and replace or repair any defects in the installed liner to the satisfaction of WRC at no additional costs.

3.12 TRAFFIC CONTROL

3.12.01 During the entire rehabilitation process, the AWARDED VENDOR(S) shall provide all necessary barricades, signs, flagmen, minor traffic devices, etc., to maintain both vehicular and pedestrian traffic and if not possible all necessary barricades, signs, minor traffic devices, etc. for the road and sidewalk closure per the Michigan Manual of Uniform Traffic Control Devices.

3.13 CLEAN UP

3.13.01 Upon completion of the installation work and after required testing indicates the lining(s) are acceptable, the AWARDED VENDOR(S) shall restore the project area affected by his operation to its original condition.

By-Pass Pumping – 5 pages

1.1 SUMMARY

1.1.1 Section includes By-Pass Pumping

1.1.1.1 It is the intent of this specification to implement a temporary pumping system for the purpose of diverting the existing flow around a work area for the duration of the work.

1.1.2 Referenced Specifications:

1.1.2.1 CCTV Inspection Sewer

1.1.2.2 Sewer Cleaning

1.1.2.3 Sewer Pipe Joint Sealing

1.1.2.4 Sewer Pipe Joint Testing

1.1.2.5 Chemical Sealing (Grout) Material

1.1.2.6 Thermal Cured in Place Pipe

1.1.2.7 UV Cured in Place Pipe

1.1.2.8 Manhole Rehabilitation and Spray Lining

1.1.2.