Specs B.pdf

NFE Engineers Woodland Corrections Utility Improvements

472/23129.SDW

33 4200 - 5

c. End Connections: Mechanical joint, flanged, threaded, or push on.

d. Interior Coating: Complying with AWWA C550.

5.6 GATE VALVE ACCESSORIES AND SPECIALTIES

A. Valve Boxes: Comply with AWWA M44 for cast-iron valve boxes. Include top section, adjustable extension of length required for depth of burial of valve, plug with lettering "WATER," and bottom section with base that fits over valve and with a barrel approximately 5 inches in diameter.

1. Operating Wrenches: Steel, tee-handle with one pointed end, stem of length to operate deepest buried valve, and socket matching valve operating nut.

PART 6 - EXECUTION

6.1 EARTHWORK

A. Comply with excavating, trenching, and backfilling requirements in Section 31 2000 "Earth Moving."

6.2 PIPING APPLICATIONS

A. Transition couplings and special fittings with pressure ratings at least equal to piping pressure rating may be used unless otherwise indicated.

B. Do not use flanges or unions for underground piping.

C. Flanges, unions, grooved-end-pipe couplings, and special fittings may be used, instead of joints indicated, on aboveground piping and piping in vaults.

D. Underground water-service piping NPS 3/4 to NPS 3 to be any of the following:

1. Soft copper tube, ASTM B88, Type K ; wrought-copper, solder-joint fittings; and brazed joints.

2. PE, ASTM pipe; molded PE fittings; and heat-fusion joints.

6.3 VALVE APPLICATIONS

A. General Application: Use mechanical-joint-end valves for NPS 3 and larger underground installation. Use threaded- or flanged-end valves for installation in vaults. Use UL/FM Global, nonrising-stem gate valves for installation with indicator posts. Use corporation valves and curb valves with ends compatible with piping, for NPS 2 and smaller installation.

B. Drawings indicate valve types to be used. Where specific valve types are not indicated, the following requirements apply:

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1. Underground Valves, NPS 3 and Larger: AWWA, cast-iron, nonrising-stem, metal-seated gate valves with valve box.

6.4 PIPING SYSTEMS - COMMON REQUIREMENTS

A. Provide a continuous bare copper or aluminum tracer wire not less than 0.10 inch in diameter in sufficient length over each separate run of nonmetallic pipe.

6.5 INSTALLATION OF PIPING

A. Water-Main Connection:

1. Tap water main in accordance with requirements of water utility company and of size and in location indicated.

B. Make connections larger than NPS 2 with tapping machine according to the following:

1. Install tapping sleeve and tapping valve in accordance with MSS SP-60.

2. Install tapping sleeve on pipe to be tapped. Position flanged outlet for gate valve.

3. Use tapping machine compatible with valve and tapping sleeve; cut hole in main. Remove tapping machine and connect water-service piping.

4. Install gate valve onto tapping sleeve. Comply with MSS SP-60. Install valve with stem pointing up and with valve box.

C. Make connections NPS 2 and smaller with drilling machine according to the following:

1. Install service-saddle assemblies and corporation valves in size, quantity, and arrangement required by utility company standards.

2. Install service-saddle assemblies on water-service pipe to be tapped. Position outlets for corporation valves.

3. Use drilling machine compatible with service-saddle assemblies and corporation valves.

Drill hole in main. Remove drilling machine and connect water-service piping.

4. Install corporation valves into service-saddle assemblies.

5. Install manifold for multiple taps in water main.

6. Install curb valve in water-service piping with head pointing up and with service box.

D. Install PE pipe in accordance with ASTM D2774 and ASTM F645.

E. Extend water-service piping and connect to water-supply source and building water-piping systems at outside face of building wall in locations and pipe sizes indicated.

1. Terminate water-service piping at building wall until building water-piping systems are installed. Terminate piping with caps, plugs, or flanges as required for piping material.

Make connections to building water-piping systems when those systems are installed.

F. Install sleeve seals for piping penetrations of concrete walls and slabs. Comply with requirements for sleeve seals specified in architectural details.

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G. Install underground piping with restrained joints at horizontal and vertical changes in direction.

Use restrained-joint piping, thrust blocks, anchors, tie-rods and clamps, and other supports.

H. Comply with Section 22 1116 "Domestic Water Piping" for potable-water piping inside the building.

6.6 JOINT CONSTRUCTION

A. Make pipe joints according to the following:

1. Copper-Tubing, Pressure-Sealed Joints: Join copper tube and pressure-seal fittings with tools and procedures recommended by pressure-seal-fitting manufacturer. Leave insertion marks on pipe after assembly.

2. PE Piping Insert-Fitting Joints: Use plastic insert fittings and fasteners in accordance with fitting manufacturer's written instructions.

6.7 INSTALLATION OF VALVES

A. AWWA Gate Valves: Comply with AWWA C600 and AWWA M44. Install each underground valve with stem pointing up and with valve box.

B. AWWA Valves Other Than Gate Valves: Comply with AWWA C600 and AWWA M44.

C. UL-Listed or FM Global-Approved Gate Valves: Comply with NFPA 24. Install each underground valve and valves in vaults with stem pointing up and with vertical cast-iron indicator post.

D. UL-Listed or FM Global-Approved Valves Other Than Gate Valves: Comply with NFPA 24.

E. MSS Valves: Install as component of connected piping system.

F. Corporation Valves : Install each underground curb valve with head pointed up and with service box.

6.8 CONNECTIONS

A. Connect water-distribution piping to existing water main.

B. Connect water-distribution piping to interior domestic water piping.

C. Ground equipment in accordance with Section 26 0526 "Grounding and Bonding for Electrical Systems."

D. Connect wiring in accordance with Section 26 0519 "Low-Voltage Electrical Power Conductors and Cables."

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6.9 FIELD QUALITY CONTROL

A. Piping Tests: Conduct piping tests before joints are covered and after concrete thrust blocks have hardened sufficiently. Fill pipeline 24 hours before testing and apply test pressure to stabilize system. Use only potable water.

B. Hydrostatic Tests: Test at not less than one-and-one-half times working pressure for two hours.

1. Increase pressure in 50 psig increments and inspect each joint between increments. Hold at test pressure for one hour; decrease to 0 psig. Slowly increase again to test pressure and hold for one more hour. Maximum allowable leakage is 2 quarts per hour per 100 joints.

Remake leaking joints with new materials and repeat test until leakage is within allowed limits.

C. Prepare reports of testing activities.

6.10 IDENTIFICATION

A. Install continuous underground detectable warning tape during backfilling of trench for underground water-distribution piping. Locate below finished grade, directly over piping.

Underground warning tapes are specified in Section 31 2000 "Earth Moving."

6.11 CLEANING

A. Clean and disinfect water-distribution piping as follows:

1. Purge new water-distribution piping systems and parts of existing systems that have been altered, extended, or repaired before use.

2. Use purging and disinfecting procedure prescribed by authorities having jurisdiction or, if method is not prescribed by authorities having jurisdiction, use procedure described in NFPA 24 for flushing of piping. Flush piping system with clean, potable water until dirty water does not appear at points of outlet.

3. Use purging and disinfecting procedure prescribed by authorities having jurisdiction or, if method is not prescribed by authorities having jurisdiction, use procedure described in AWWA C651 or do as follows:

a. Fill system or part of system with water/chlorine solution containing at least 50 ppm of chlorine; isolate and allow to stand for 24 hours.

b. Drain system or part of system of previous solution and refill with water/chlorine solution containing at least 200 ppm of chlorine; isolate and allow to stand for three hours.

c. After standing time, flush system with clean, potable water until no chlorine remains in water coming from system.

d. Submit water samples in sterile bottles to authorities having jurisdiction. Repeat procedure if biological examination shows evidence of contamination.

B. Prepare reports of purging and disinfecting activities.

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END OF SECTION 33 1415

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PART 1 GENERAL

A. The rehabilitation of pipelines shall be done by the installation of a resin-impregnated flexible tube which, when cured, shall be continuous and tight-fitting throughout the entire length of the original pipe. The CIPP shall extend the full length of the pipe and provide a structurally sound, jointless and water-tight new pipe-within-a-pipe. The Contractor is responsible for proper, accurate and complete installation of the CIPP using the system selected by the Contractor meeting the Owners requirements.

B. Neither the CIPP product, system, nor its installation, shall cause adverse effects to any of the Owner’s processes or facilities. The installation pres-sure for the product shall not damage the system in any way, and the use of the product shall not result in the formation or production of any detri-mental compounds or by-products at the wastewater treatment plant. The

Contractor shall notify the Owner and identify any by-products produced as a result of the installation operations, test and monitor the levels, and comply with any and all local waste discharge requirements. The Contrac-tor shall cleanup, restore existing surface conditions and structures, and re-pair any of the CIPP system determined to be defective. The Contractor shall conduct installation operations and schedule cleanup in a manner to cause the least possible obstruction and inconvenience to traffic, pedestri-ans, businesses and property owners or tenants and to provide an environ-mentally safe restored jobsite.

C. The prices submitted by the Contractor, shall include all costs of permits, labor, equipment and materials for the various bid items necessary for fur-nishing and installing, complete in place, CIPP in accordance with these specifications. All items of work not specifically mentioned herein which are required, by the Contractor, to make the product perform as intended and deliver the final product as specified herein shall be included in the re-spective lump sum bid.

1.1 DESCRIPTION OF WORK AND PRODUCT DELIVERY

A. This PSG covers all work necessary to furnish and install the CIPP. The

Contractor shall provide all materials, labor, equipment, and services nec-essary for traffic control (if required), bypass pumping and/or diversion of flows, cleaning, measurement of sewers to be rehabilitated, CIPP installa-tion, reconnection of service connections, all quality controls, provide

33 4200 - 11 samples for performance of required material tests, final television inspec-tion, testing of the rehabilitated pipe system, and other work, all as speci-fied herein.

B. The CIPP shall be continuous and jointless from manhole to manhole or access point to access point and shall be free of all defects that will affect the long-term life and operation of the pipe.

C. The CIPP shall not leak at the manholes or through the wall of the installed pipe.The installed CIPP shall comply with the chemical resistance require-ments of ASTM F1216 or ASTM D5813.

D. All existing and confirmed active service connections and any other service laterals to be reinstated, as directed by the Owner, shall be re-opened ro-botically, to their original shape and to 90% - 95% of their original area. All over-cut or under-cut service connections shall be properly repaired to meet the requirements of these specifications.

E. All materials furnished, as part of this contract shall be marked with de-tailed product information, stored in a manner specified by the manufac-turer and tested to the requirement of this contract.

1.2 REFERENCES

A. The following documents form a part of this specification to the extent stated herein and shall be the latest editions thereof. Where differences exist between codes and standards, the requirements of these specifica-tions shall apply. All references to codes and standards shall be to the latest revised version.

• ASTM - F1216 Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube

• ASTM - F1743-17 Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Pulled-in-Place Installation of Cured-in-Place Ther-mosetting Resin Pipe (CIPP)

• ASTM - D543 Standard and Practice for Evaluating the Resistance of Plas-tics to Chemical Reagents

• ASTM - D638 Standard Test Method for Tensile Properties of Plastics

• ASTM - D790 Standard Test Methods for Flexural Properties of Unrein-forced and Reinforced Plastics and Electrical Insulating Materials

• ASTM - D792 Standard Test Methods for Density and Specific Gravity of

Plastics by Displacement.

• ASTM - F2019-20 Standard Practice for Rehabilitation of Existing Pipelines

33 4200 - 12 and Conduits by the Pulled in Place Installation of Glass Reinforced Plastic

Cured-in-Place (GRP-CIPP) Using the UIV-Light Curing Method

• ASTM F2561 Standard Practice for Rehabilitation of a Sewer Service

Lateral and Its Connection to the Main Using a One-Piece Main and Lat-eral Cured-in-Place Liner

• ASTM - D2990 Standard Test Methods for Tensile, Compressive, and

Flexural Creep and Creep-Rupture of Plastics

• ASTM - D3567 Standard Practice for Determining Dimensions of Fiber-glass (Glass- Fiber-Reinforced Thermosetting Resin) Pipe and Fittings

• ASTM - D3681 Standard Test Method for Chemical Resistance of “Fiber-glass (Glass Fiber Reinforced Thermosetting Resin) Pipe in a Deflected

Condition

• ASTM - D5813 Standard Specification for Cured-in Place Thermosetting

Resin Sewer Pipe

1.3 PERFORMANCE WORK STATEMENT (PWS) SUBMITTAL

A. The Contractor shall submit, to the Owner, a Performance Work Statement

(PWS) which clearly defines the CIPP product delivery in conformance with the requirements of these contract documents. Unless otherwise directed by the Owner, the PWS shall, at a minimum, contain the following:

B. Clearly indicate that the CIPP will conform to the project requirements as outlined in the Description of Work and as delineated in these specifica-tions.

C. A detailed product installation plan describing all preparation work, clean-ing operations, bypass pumping, traffic or pedestrian control, installation procedure, method of curing, service reconnection, quality control, testing to be performed, warrantees furnished and all else necessary and appro-priate for a complete CIPP installation. A detailed installation schedule shall be prepared, submitted and conform to the requirements of this con-tract.

D. Contractor’s description of the proposed CIPP technology, including a de-tailed plan for identifying all active service connections maintaining service, during mainline CIPP installation, to each building connected to the section of pipe being rehabilitated.

E. A description of the CIPP materials to be furnished for the project. Materi-als shall be fully detailed in the submittals and conform to these

33 4200 - 13 specifications and/or shall conform to the pre-approved product submis-sion.

F. A statement of the Contractors experience. The Contractor shall have a minimum of three (3) years of cumulative experience installing CIPP in pipe of a similar size, length and configuration as contained in this contract. The lead personnel, including the superintendent, the foreman and the lead crew personnel for resin wet-out, the CIPP installation, curing and the ro-botic service reconnections each must have a minimum of one (1) year of experience with the CIPP technology proposed for this contract and must have demonstrated competency and experience to perform the scope of work contained in this contract. The name and experience of each lead individual performing work on this contract shall be submitted with the PWS.

Personnel replaced by the Contractor, on this contract, shall have similar, verifiable experience as the personnel originally submitted for the project

G. Engineering design calculations, in accordance with the Appendix of ASTM

F1216, or other design protocol as specified by the owner, for each length of CIPP to be installed including the thickness of each proposed CIPP. It will be acceptable for the Contractor to submit a design for the most severe line condition and apply that design to all of the line sections. All calculations shall include data that conforms to the requirements of these specifications or has been pre-approved by the Owner.

H. Proposed manufacturers technology data shall be submitted for all CIPP products and all associated technologies to be furnished.

I. Submittals shall include information on CIPP intended for installation and all tools and equipment required for a complete installation. The PWS shall identify which tools and equipment will be redundant on the job site in the event of equipment breakdown. All equipment to be furnished for the pro-ject, including proposed back-up equipment, shall be clearly described. The

Contractor shall outline the mitigation procedure to be implemented in the event of key equipment failure during the installation process.A detailed description of the Contractor’s proposed procedures for removal of any ex-isting blockages in the pipeline that may be encountered during the clean-ing process.

1.4 PRODUCT SUBMITTALS

A. Fabric Tube – including the manufacturer and description of product com-ponents such as felts and reinforcing materials and tube mechanical prop-erties.

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B. Flexible membrane (coating) material – including materials specific to the proposed curing method and recommended repair (patching) procedure if applicable. Raw Resin Data - including the manufacturer and description of product components including the spectroscopic wavelength diagram for the resin being furnished as well as mechanical properties, corrosion data and creep data.

C. Manufacturers’ shipping, storage and handling recommendations for all components of the CIPP system.

D. Safety Data Sheets (SDS) for all materials to be furnished for the project.

E. Tube wet-out & cure method including:

1. A description of the wet-out procedure for the proposed technology. In the case of tubes wet-out by a third party, the wet-out information from the third-party source.

2. The Manufacturer’s recommended cure method for each diameter and thickness of CIPP to be installed. The PWS shall contain a detailed curing procedure outlining the curing medium, the method of applica-tion and how the curing temperatures will be monitored.

1.5 QUALITY CONTROL PLAN (QCP)

A. A detailed quality control plan (QCP) that fully represents and conforms to the requirements of these specifications shall be submitted to the Owner.

At a minimum the QCP shall include the following:

1. A detailed discussion of the proposed quality controls to be per-formed by the Contractor.

2. Defined responsibilities, of the Contractor’s personnel, for assuring that all quality requirements for this contract are met. These shall be as-signed by the Contractor to specific personnel.

3. Proposed procedures for quality control, product sampling and testing shall be defined and submitted as part of the plan.

4. Proposed methods for product performance controls, including method of and frequency of product sampling and testing both in raw material

33 4200 - 15 form and cured product form.

5. Scheduled performance and product test result reviews between the

Contractor and the Owner at a regularly scheduled job meeting.

6. Inspection forms and guidelines for quality control inspections shall be prepared in accordance with the standards specified in this contract and submitted with the QCP.

1.6 CIPP REPAIR/REPLACEMENT

A. Occasionally installations will result in the need to repair or replace a de-fective CIPP. The Contractor shall outline specific repair or replacement procedures for potential defects that may occur in the installed CIPP. Re-pair/replacement procedures shall be as recommended by the CIPP sys-tem manufacturer and shall be submitted as part of the PWS.

B. Defects in the installed CIPP that will not affect the operation and long-term life of the product shall be identified and defined.

C. Repairable defects that may occur in the installed CIPP shall be specifically defined by the Contractor based on manufacturer’s recommendations, in-cluding a detailed step-by-step repair procedure, resulting in a finished product meeting the requirements of these contract specifications.

D. Unrepairable defects that may occur to the CIPP shall be clearly defined by the Contractor based on the manufacturer’s recommendations, includ-ing a recommended procedure for the removal and replacement of the

CIPP.

1.7 WARRRANTY

A. The materials used for the project shall be certified by the manufacturer for the specified purpose. The Contractor shall warrant the CIPP material and installation for a period of one (1) year. During the Contractor warranty pe-riod, any defect which may materially affect the integrity, strength, function and/or operation of the pipe, shall be repaired at the Contractor’s expense in accordance with procedures included in Section 1.7 CIPP Repair/Re-placement and as recommended by the manufacturer.

B. On any work completed by the Contractor that is defective and/or has been repaired, the Contractor shall warrant this work for (1) year in addition to the warrantee required by the contract.

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C. After a pipe section has been rehabilitated and for a period of time up to one (1) year following completion of the project, the Owner may inspect all or portions of the rehabilitated system. The specific locations will be se-lected at random by the Owner’s inspector and should include all sizes of

CIPP from this project. If it is found that any of the CIPP has developed abnormalities since the time of "Post Construction Television Inspection," the abnormalities shall be repaired and/or replaced as defined in Section

1.7 CIPP Repair/Replacement and as recommended by the manufacturer.

If, after inspection of a portion of the rehabilitated system under the contract, problems are found, the Owner may televise all the CIPP installed on the contract. All verified defects shall be repaired and/or replaced by the Con-tractor and shall be performed in accordance with Section 1.7 CIPP Re-pair/Replacement and per the original specifications, all at no additional cost to the Owner.

PART 2 PRODUCTS

2.1 MATERIALS

A. The CIPP System must meet the chemical resistance requirements refer-enced in ASTM F1216 or ASTM D5813.

B. All materials shipped to the project site shall be accompanied by test reports certifying that the material conforms to the appropriate ASTM standards listed herein. Materials shall be shipped, stored, and handled in a manner consistent with written recommendations of the CIPP system manufacturer to avoid damage. Damage includes, but is not limited to, gouging, abrasion, flattening, cutting, puncturing or ultra- violet (UV) degradation. On site stor-age locations shall be approved by the Owner. All damaged materials shall be promptly removed from the project site at the Contractor’s expense and disposed of in accordance with all current applicable agency regulations.

2.2 FABRIC TUBE

A. The fabric tube shall consist of one or more layers of absorbent non-woven felt fabric, felt/fiberglass, felt/carbon fiber, carbon fiber or fiberglass and meet the requirements of ASTM F 1216, ASTM F 1743, or ASTM F2019 and ASTM D5813 as applicable The fabric tube shall be capable of

33 4200 - 17 absorbing and carrying resins, constructed to withstand installation pressures and curing temperatures and have sufficient strength to bridge missing pipe segments and stretch to fit irregular pipe sections.

The Contractor shall submit certified information from the felt manufacturer on the nominal void volume in the felt fabric that will be filled with resin.

B. The wet-out fabric tube shall have a uniform thickness and excess resin distribution that when compressed at installation pressures will meet or ex-ceed the design thickness after cure.

C. The fabric tube shall be manufactured to a size and length that when in-stalled will tightly fit the internal circumference of the original pipe. Allow-ance shall be made for circumferential stretching during installation. The tube shall be properly sized to the diameter of the existing pipe and the length to be rehabilitated and be able to stretch to fit irregular pipe sections and negotiate bends. The Contractor shall determine the minimum tube length necessary to effectively span the designated run between man-holes. The Contractor shall verify the lengths in the field prior to ordering and prior to impregnation of the tube with resin to ensure that the tube will have sufficient length to extend the entire length of the run. The Contractor shall also measure the inside diameter of the existing pipelines in the field prior to ordering tube so that the CIPP can be installed in a tight-fitted con-dition.

D. The outside and/or inside layer of the fabric tube (before inversion/pull-in, as applicable) shall be coated with an impermeable, flexible membrane that will contain the resin and facilitate, if applicable, vacuum impregnation and monitoring of the resin saturation during the resin impregnation (wet-out) procedure.

E. No material shall be included in the fabric tube that may cause delamina-tion in the cured CIPP. No dry or unsaturated layers shall be acceptable upon visual inspection as evident by color contrast between the tube fabric and the activated resin containing a colorant, if a colorant is utilized.

F. The wall color of the interior pipe surface of CIPP after installation shall be a light reflective color so that a clear detailed examination with closed cir-cuit television inspection equipment may be made. The color contrast shall be sufficient to distinguish between the fully resin saturated felt fabric and dry or resin lean areas.

G. Seams in the fabric tube, if applicable, shall meet the requirements of ASTM

F1743.

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H. The outside of the fabric tube shall be marked at a maximum of every 5 feet with the name of the manufacturer or CIPP system, manufacturing lot and production footage.

I. The minimum length of the fabric tube shall be that deemed necessary by the installer to effectively span the distance from the starting manhole to the terminating manhole or access point, plus that amount required to run-in and run-out for the installation process.

J. The nominal fabric tube wall thickness shall be constructed, as a minimum, to a sufficient thickness that exceeds the required design thickness for that section of installed CIPP. Wall thickness transitions may be fabricated into the fabric tube between installation entrance and exit access points. The quantity of resin used in the impregnation shall be sufficient to fill all the felt voids for the nominal felt thickness.

2.3 RESIN

A. The resin shall be a corrosion resistant polyester or vinyl ester resin and catalyst system or epoxy and hardener system that, when properly cured within the tube composite, meets the requirements of ASTM F1216, ASTM

F1743 or F2019 and ASTM D5813, the physical properties herein, and those which are to be utilized in the design of the CIPP for this project. The resin, specified for the specific application defined in the contract docu-ments, shall produce CIPP which will comply with or exceed the structural and chemical resistance requirements of this specification.

2.4 The resin to tube ratio, by volume, shall be furnished as recommended by the manufacturer.

2.5 STRUCTURAL REQUIREMENTS

A. The physical properties and characteristics of the finished CIPP will vary considerably, depending on the types and mixing proportions of the mate-rials used and the degree of cure executed. It shall be the responsibility of the Contractor to control these variables and to provide a CIPP system which meets or exceeds the minimum properties specified herein or as submitted in the PWS.

B. The CIPP shall be designed as per ASTM F1216 Appendix X1. The CIPP design shall assume no bonding to the original pipe wall.

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C. The design engineer shall set the long-term (50 year extrapolated) Creep

Retention Factor at 50% of the initial design flexural modulus as determined by ASTM D790 test method. This value shall be used unless the Contractor submits long-term test data (ASTM D2990) to substantiate a higher reten-tion factor.

D. The cured pipe material (CIPP) shall, at a minimum, meet or exceed the structural properties, as listed below or as submitted in the PWS.

2.6 MINIMUM PHYSICAL PROPERTIES

Property Test

Method

Cured Composite

Per

ASTM F1216

Cured

Composite

Per Design

Flexural Modulus of Elasticity

(Short-Term) Felt Tubes.

Felt/Fiberglass, Fiberglass as recommended by the

Manufacturer

ASTM

D790

250,000 psi

Contractor

Value

Flexural Strength

(Short-Term) Felt Tubes.

Felt/Fiberglass, Fiberglass as recommended by the

Manufacturer

ASTM

D790

4,500 psi

Contractor

Value

A. The required structural CIPP wall thickness shall be based, as a minimum, on the physical properties of the cured composite and per the design of the

Professional Engineer (see section 1.3.G) and in accordance with the de-sign equations contained in Appendix X1 of ASTM F1216, or Appendix

X1.1 of ASTM F2019 and the following design parameters:

Design Safety Factor 2.0 (1.5 for pipes 36'' or larger, if applicable)

Creep Retention Factor 50% or otherwise verified by test data

Ovality 2% or as measured by field inspection

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Constrained Soil Modulus Per AASHTO LRFD Section 12 and AWWA Manual M45

Groundwater Depth As specified or indicated on the Plans

Soil Depth (above the crown) As specified or indicated on the Plans

Live Load Highway, railroad, airport or permanent structures as applicable

Soil Load (assumed) 120 lb./cu. ft. or as specified

Minimum Service Life 50 years

B. The Contractor shall submit, prior to installation of the lining materials, cer-tification of compliance with these specifications and/or the requirements of the pre-approved CIPP system. Certified material test results shall be included that confirm that all materials conform to these specifications and/or the pre-approved system. Materials not complying with these re-quirements will be rejected.

C. The design soil modulus may be adjusted based on data, determined from detailed project soil testing results, as provided by the Owner in the con-tract documents.

PART 3 INSTALLATION

3.1 CONSTRUCTION REQUIREMNTS

A. The wet-out tube shall be constructed of materials and methods that, when installed, shall provide a jointless and continuous structurally sound CIPP able to withstand all imposed static and dynamic loads on a long-term basis as required in the specifications.

B. The Contractor may, under the direction of the Owner, utilize any of the existing manholes in the project area as installation access points. If a street must be closed to traffic because of the location of the sewer, the

Contractor shall furnish a detailed traffic control plan and all labor and equipment necessary.

C. Cleaning of Pipelines – Before ordering tube materials for the project, the

Contractor shall remove all internal debris from the pipeline that will inter-fere with the installation and the final product delivery of the CIPP, as re-quired in these specifications, and accurately measure and document the

33 4200 - 21 diameter and length of the existing pipeline to be rehabilitated. Solid debris and deposits shall be removed from the system and disposed of properly by the Contractor. Moving material from manhole section to manhole sec-tion shall not be allowed. As applicable, the Contractor shall either plug or install a flow bypass pumping system to properly clean the pipelines. Pre-caution shall be taken by the Contractor in the use of cleaning equipment to avoid damage to the existing pipe. The repair of any damage, caused by the cleaning equipment, shall be the responsibility of the Contractor. Unless otherwise specified by the Owner, the Contractor shall dispose of all debris at no charge.

D. Bypassing Existing Flows - The Contractor shall provide for the flow of ex-isting mainline and service connection effluent, if applicable, around the section or sections of pipe designated for CIPP installation. With most small diameter pipelines, particularly on terminal sewers, plugging will be adequate but must be monitored on a regular basis to prevent backup of sewage. Service connection effluent may be plugged, if required, only after proper notification to the facility and may not remain plugged overnight.

Installation of the CIPP shall not begin until the Contractor has installed the required plugs, or a sewage bypass system and all pumping facilities have been installed and tested under full operating conditions including the by-pass of mainline and side sewer flows, if required. Once the installation has begun, existing flows shall be maintained, until the resin/tube compo-site is fully cured, cooled down, fully televised and the CIPP ends finished.

The Contractor shall coordinate sewer bypass and flow interruptions with the Owner at least 7 days in advance. The pump and bypass lines shall be of adequate capacity and size to handle peak flows. The Contractor shall submit a detail of the bypass plan and design to the Owner before pro-ceeding with any CIPP installation.

E. Line Obstructions - It shall be the responsibility of the Contractor to clear the line of obstructions that will interfere with the installation and long-term performance of the CIPP. If pre-installation inspection reveals an obstruc-tion, misalignment, broken or collapsed section or sag that was not identi-fied as part of the original scope of work and will prohibit proper installation of the CIPP, the Contractor may be directed by the Owner to correct the problem(s) prior to installation by utilizing open cut repair methods. The

Contractor shall be compensated for this work under a contingency pay item designated for open cut point repairs. Removal of any previously un-known obstructions shall be considered as a changed condition. The cost of removal of obstructions that appeared on pre-bid video documentation and made available to the Contractor, prior to the bid opening, shall be compensated for on a unit price basis in accordance with the contract

33 4200 - 22 documents.

F. The Contractor shall be responsible for confirming the locations of all branch service connections prior to installing the CIPP. If required in the contract documents, each connection will be dye tested to determine whether or not the connection is live or abandoned. Other approved meth-ods to confirm live connections are acceptable. The cost for dye testing of existing service connections shall be compensated at the unit price bid in the Proposal for Dye Testing of Existing Service Connections. In the event the status of a service connection cannot be adequately defined, the Owner will make the final decision, prior to installation of the CIPP, as to the status.

Typically, only service connections deemed “active” shall be reopened by the Contractor.

3.2 The Contractor shall be allowed use water from an owner-approved fire hydrant in the project vicinity. Use of an approved double check backflow assembly shall be required. Contractor shall provide his own approved assembly.

3.3 INSTALLATION OF CIPP

A. The CIPP shall be installed and cured in the host pipe per the manufac-turer’s specifications as described and submitted in the PWS.

B. CIPP installation shall be in accordance with the applicable ASTM stand-ards as modified in this section 3.2.

C. If significant groundwater infiltration is present in the existing sewer, the

Contractor shall install a pre-liner tube or perform chemical grouting to con-trol resin loss and contamination, maintain CIPP thickness, prevent physi-cal property reduction and prevent inadequate curing of the CIPP resulting from water or other contamination of the resin during installation. The pre-liner tube shall be a plastic tube to fit the existing pipeline and shall be con-tinuous from manhole (access) to manhole (access). Pre-liners are not required in this situation when using pulled-in tubes with exterior coatings or in the case of UV or LED wet-out tubes that contain an inner and outer foil material.

D. The wet-out tube shall be positioned in the pipeline using the method spec-ified by the manufacturer. Care should be exercised not to damage the tube as a result of installation. The wet-out tube should be pulled-in or in-verted through an existing manhole or approved access point and fully ex-tend to the next designated manhole or termination point.

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E. Prior to installation and as recommended by the manufacturer, remote temperature gauges or sensors shall be placed inside the host pipe to mon-itor the temperatures during the cure cycle. CIPP and/or host pipe interface temperature shall be monitored and logged during cure.

F. To monitor the temperature of the CIPP wall and to verify correct curing, where specified by the contract documents, temperature monitors can be placed between the host pipe and the CIPP in the bottom of the host pipe

(invert) at manholes or access points and/or throughout its entire length

(continuous) to monitor the temperature on the outside of the CIPP during the curing process. Curing shall be accomplished by utilizing the appropri-ate medium or ultraviolet or LED light in accordance with the manufac-turer’s recommended cure procedure and/or schedule. The curing source or in and output temperatures shall be monitored and logged during the cure cycles, if applicable. The manufacturer’s recommended cure method

& schedule shall be used for each line segment installed, and the CIPP wall thickness and the existing ground conditions with regard to tempera-ture, moisture level, and thermal conductivity of soil shall be taken into ac-count by the Contractor.

G. For heat cured CIPP, if any temperature sensor, or continuous sensor lo-cation does not reach the temperature as specified by the manufacturer to achieve proper curing or cooling, the installer can make necessary adjust-ments to comply with the manufacturer’s recommendations. For continu-ous temperature monitoring, the system computer should have an output report that specifically identifies stations along the length of pipe, indicates the maximum temperature achieved and the sustained temperature time at the stations. At each station along the length of the pipe, the computer should record both the maximum temperature and the minimum cool down temperature and comply with the manufacturer’s recommendations.

H. For UV or LED Cured CIPP, light train sensor readings shall provide output documenting the cure along the entire length of the installed CIPP. The cure procedure shall be in accordance with the manufacturer’s recommendation as included in the PWS submission by the Contractor.

3.4 COOL DOWN

A. The Contractor shall cool the CIPP in accordance with the approved CIPP manufacturer’s recommendations as described and outlined in the PWS.

B. Temperatures and curing data shall be monitored and recorded by the

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Contractor throughout the installation process to ensure that each phase of the process is achieved as approved in accordance with the CIPP sys-tem manufacturer’s recommendations.

3.5 FINISH

A. The installed CIPP shall be continuous over the entire length of a sewer line section and be free from visual defects such as foreign inclusions, dry spots, pinholes, major wrinkles and delamination. The CIPP shall be im-pervious and free of any leakage through the CIPP wall.

B. Any defect which will or could affect the structural integrity or strength of the

CIPP shall be repaired at the Contractor’s expense in accordance with the procedures submitted under Section 1.7 CIPP Repair/Replacement.

C. The beginning and end of the CIPP shall be sealed to the existing host pipe, if specified. The sealing material shall be compatible with the pipe end and shall provide a watertight seal.

D. If any of the service connections leak water between the host pipe and the installed CIPP, the connection mainline interface shall be sealed, if re-quired by these specifications, to provide a leak tight connection.

E. If the wall of the CIPP leaks, it shall be repaired or removed and replaced with a watertight pipe as recommended by the manufacture of the CIPP system.

3.6 MANHOLE CONNECTIONS AND RECONNECTIONS OF EXISTING SERVICES

A. A seal, consisting of a resin mixture or hydrophilic seal compatible with the installed CIPP, shall be applied at manhole/wall interface, if specified, in accordance with the CIPP System manufacturer’s recommendations.

B. Existing services shall be internally reconnected unless indicated other-wise in the contract documents

C. Reconnections of existing services shall be made after the CIPP has been installed, fully cured, and cooled down. It is the Contractor’s responsibility to make sure that all active service connections are reconnected.

D. A CCTV camera and remote cutting tool shall be used for internal

33 4200 - 25 reconnections. The machined opening shall be at least 90 percent of the service connection opening area and the bottom of both openings must match. The opening shall not be more than 100 percent of the service con-nection opening. The edges of the opening shall not have pipe fragments or CIPP fragments which may obstruct flow or snag debris. In all cases the invert of the service connection shall be cut flush with the invert entering the mainline.

E. If service reinstatements result in openings that are greater than 100 per-cent of the service connection opening, the Contractor shall install a CIPP type repair, sufficiently in size to completely cover the over-cut service con-nection. No additional compensation will be paid for the repair of over-cut service connections.

F. Coupons or fragments of CIPP material resulting from service tap cutting shall be collected at the next manhole downstream of the pipe rehabilita-tion operation prior to leaving the site. Coupons may not be allowed to pass through the system.

3.7 TESTING OF INSTALLED CIPP

A. The physical properties of the installed CIPP shall be verified through field sampling and laboratory testing. All materials testing shall be performed at the Owner’s expense by an independent third-party laboratory selected by the Owner as recommended by the CIPP manufacturer. All tests shall be in accordance with applicable ASTM test methods to confirm compliance with the requirements specified in these contract documents, or as submit-ted in the PWS.

B. The Contractor shall provide samples for testing to the Owner from the ac-tual installed CIPP. Samples shall be provided from each section of CIPP installed or as requiredby the Owner. The sample shall be cut from a sec-tion of cured CIPP that has been inverted or pulled through a like diameter pipe which has been held in place by a suitable heat sink, such as sand-bags. All curing, cutting and identification of samples will be witnessed by the Owner and transmitted by the Owner’s representative as specified, and sent to the testing laboratory. Flat plate samples can be taken on pipelines greater than 18 inches in diameter, if specified. Identification on the

33 4200 - 26 samples shall be standard chain of custody markings.

C. The laboratory results shall identify the test sample location as referenced to the nearest manhole and station. Final payment for the project shall be withheld pending receipt and approval of the test results. If properties tested do not meet the minimum physical and thickness requirements, the

CIPP shall be repaired or replaced by the Contractor unless the actual physical properties and the thickness of the sample tested meet the design requirements as required in the contract.

D. Chemical resistance - The CIPP system installed shall meet the chemical resistance requirements of ASTM F1216 or ASTM D5813. CIPP samples tested shall be of the fabric tube and the specific resin proposed for actual construction. It is required that CIPP samples without plastic coating meet these chemical testing requirements. A certification may be submitted, by the Contractor, from the manufacturer verifying that the chemical re-sistance of the CIPP meets the contract requirements.

E. Hydraulic Capacity - The installed CIPP shall, at a minimum, be equal to the full flow capacity of the original pipe before rehabilitation. Calculated capacities may be derived using a commonly accepted roughness coeffi-cient for the existing pipe material taking into consideration its age and condition.

F. The installed CIPP thickness shall be measured for each line section in-stalled as per the ASTM requirements specified. If the CIPP thickness does not meet that specified in the contract and submitted as the approved de-sign by the Contractor, then the CIPP shall be repaired or removed unless the tested physical properties and the thickness of the sample tested meet the design requirements as required in the contract. The CIPP thickness shall have tolerance of minus 5%. In worker-entry size piping, where sam-pling is by flat plate, a quality based approach using the approved quality plan will be used to accept installed thickness (see discussion in following text box). If the plate sample does not meet the required physical property values, or if any quality checks are deficient, it may be necessary for the

Contractor to remove a 2-inch core from the CIPP 12 o’clock position to check thickness. The openings produced from core samples shall be re-paired in accordance with manufacturer’s recommended procedures.

G. All costs to the Contractor associated with providing cured CIPP samples for testing shall be included in the Lump Sum price bid.

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3.8 FINAL ACCEPTANCE

A. CIPP sample testing and repairs to the installed CIPP, as applicable, shall be completed before final acceptance, meeting the requirements of these specifications and documented in written form.

B. The Contractor shall perform a detailed closed-circuit television inspection in the presence of the Owner after installation of the CIPP and reconnec-tion of the side sewers. Conventional pan and tilt TV camera or sidewall scanning technology, as approved by Owner, shall be used. The finished

CIPP shall be continuous over the entire length of the installation and shall be free of significant visual defects, damage, lifts, holes, leaks and other defects that are not a reflection of the existing pipe condition. Unedited digital documentation of the inspection shall be provided to the Owner within ten (10) working days of the CIPP installation. The data shall note the inspection date, location of all reconnected side sewers, debris, as well as any defects in the CIPP, including, but not limited to, gouges, cracks, bumps, or bulges. If post installation inspection documentation is not sub-mitted within ten (10) working days of the CIPP installation, the Owner may at its discretion suspend any further installation of CIPP until the post-in-stallation documentation is submitted. As a result of this suspension, no additional working days will be added to the contract, nor will any adjust-ment be made for increase in cost. Immediately prior to conducting the closed- circuit television inspection, the Contractor shall thoroughly clean the newly installed CIPP removing all debris and build-up that may have accumulated at no additional cost to the Owner.

C. If required by the Owner in the specifications, and if the pipe diameter is less than or equal to 36”, the CIPP shall be tested for leakage using the water exfiltration test (ASTM F1216 8.2) or a low pressure air test (refer to

Appendix A). Testing is limited to pipe lengths with no reinstated service laterals and could delay service lateral reinstatement.

D. Not all CIPP line segments can be air tested because of end configurations in the manhole, shape of the CIPP and CIPP irregularities. It is recom-mended that only a set percentage of the line segments in any one project be tested in lieu of testing each line segment.

Low pressure air testing can be a dangerous operation. It is imperative that all safety protocols for plug operation & maintenance and air testing be followed, including proper blocking/bracing of plugs during the air test and limiting air tests to a maximum diameter of 36 inches.

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E. Bypass pumping or plugging from the upstream manhole shall be utilized to minimize sewage from entering the line during the inspection. In the case of bellies in the line, the pipe shall be cleared of any standing water to provide continuous visibility during the inspection.

Air Testing of CIPP

Pressure gauges used for this test shall have a minimum division of 0.1 psi and an accuracy of 0.0625 psi.

Test Procedure:

1. The tested pipe may be wet or dry.

2. The minimum test pressure should equal 3.5 psi plus 0.433 psi for each foot of average water or groundwater depth over the crown of the pipe. The maximum test pressure shall be 6 psi.

3. Slowly add air to the section of pipe being tested until the internal air pres-sure is raised to 4 psi greater than the average back pressure due to water or groundwater. The maximum air pressure shall be 6 psi.

4. Once the test pressure is reached, allow a period of time for the air tem-perature to stabilize. The stabilization period can vary from a few minutes to an hour or more dependent upon the temperature of the air and CIPP under test. Add air to maintain pressure.

5. After the temperature stabilization period, disconnect the air supply.

6. Record the time in seconds required for the air pressure to drop from

3.5 to 2.5 psi greater than the average back pressure due…