ULTRAVIOLET LIGHT CIPP LINING OF EXISTING SEWERS

Transcription

1 PART 1 GENERAL 1.01 DESCRIPTION A. SCOPE ULTRAVIOLET LIGHT CIPP LINING OF EXISTING SEWERS This contract covers the rehabilitation of severely deteriorated existing sanitary and combined sewers by lining using the following approved process: Ultra-violet light cured-in-place pipe (CIPP). The primary contract objective is the structural and hydraulic renewal of the existing sewer main. This specification pertains to the rehabilitation of main line sewers including cleaning and televising of the sewers in addition to the reinstatement of tap connections. The project is composed of approximately 1,153-feet of 12 sanitary and combined sewers. See Appendix A for lining locations and pipe section data. Liner thickness shall be designed by the contractor in accordance with this specification. The contractor shall begin construction within 14 days of issuance of the Notice to Proceed and complete all work no later than December 31, In conjunction with rehabilitating the sewer sections and related appurtenances specified in this project, the contractor shall excavate and repair sewer mains as necessary or specified, clean and televise sewers, reconnect existing sewer service connections, and provide all submittals required by this specification. Television inspection includes televising immediately before lining, televising after lining, televising after making repairs to correct liner defects, and televising after rehabilitating lateral connections. A predetermined, lump sum amount of five hundred dollars ($500.00) is included in the list of bid items to cover the cost of permits that may be required for the contractor to perform work in the public right-of-way. MSD will reimburse the contractor for actual permit fees charged by the various municipalities. Award of the contract will be determined through an evaluation of bids and made in light of the best interest of MSD. The contractor shall furnish all labor, components, materials, tools, and appurtenances necessary for the performance and completion of the contract. Copies of all internal pipe inspection videos, reports and project maps are included in the bid documents. This is considered by MSD to be the best available information; however, there are occasional inaccuracies and errors. As such, the contractor shall bear the ultimate responsibility for verifying actual field conditions and reporting any discrepancies to the MSD Project Manager prior to bid and construction. Change orders will not be issued during construction based solely on inaccurate information in the bid documents. The contractor shall be held fully liable for any damages incurred during the installation of liners that are caused by its negligence or the negligence of its subcontractor(s). The contractor shall hold harmless the City of Cincinnati and the Hamilton County Board of County Commissioners Page 1 of 12

2 and all its representatives from all suits, actions, of claims of any character brought on account of any injuries or damages sustained by any person or persons or property in the performance of this contract. Patents, Trade Secrets and Copyrights. The contractor shall pay all license fees and royalties and assume all costs incidental to the use in the performance of the work or the incorporation in the work of any invention, design, process, product or device which is the subject of patent rights, trade secrets protection rights, or copyrights held by others. The contractor shall indemnify and hold harmless the owner and engineer and anyone directly or indirectly employed by either of them from and against all claims, damages, losses and expenses (including attorney s fees and court and arbitration costs) arising out of any infringement of patent rights, trade secret protection rights, or copyrights incident to the use in the performance of the work or resulting from the incorporation in the work of any invention, design, process, product or device not specified in the contract documents, and shall defend all such claims in connection with any alleged infringement of such rights. B. MSD PROJECT CONTACTS This contract will be administered and performed under the direction and inspection of the MSD Project Engineer/Manager, Michael Stevens, P.E., Wastewater Collection Division, 225 West Galbraith Road, Cincinnati, Ohio 45215, telephone number All technical questions should be directed to the Project Engineer/Manager. All contract-related questions should be directed to Donald Cahill, Wastewater Engineering Division, at C. REQUIREMENTS Contractor shall provide and install a resin impregnated fiberglass material tube with a plastic coated wearing surface in all sewers identified for CIPP lining in accordance with American Society for Testing and Materials ASTM F1216 and ASTM F QUALITY ASSURANCE A. REFERENCES This section contains references to the following documents. They are a part of this section as specified and modified. In case of conflict between the requirements of this section and those of the listed documents, the requirements of this section shall prevail. Reference ASTM D543 ASTM D543 ASTM D790 ASTM D883 ASTM D1600 ASTM F412 Title Test Method for Resistance of Plastics to Chemical Reagents Test Method for Tensile Properties of Plastics Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials Definitions and Terms Relating to Plastics Abbreviations, Acronyms, and Codes for Terms Relating to Plastics Definitions of Terms relating to Plastic Piping Systems Page 2 of 12

3 ASTM F1216 ASTM F 2019 Rehabilitation of Existing Pipelines and Conduits by Inversion and Curing of a Resin Impregnated Tube Rehabilitation of Existing Pipelines and Conduits by the Pulled in Place Installation of Glass Reinforced Plastic (GRP) Cured-in-Place Thermosetting Resin Pipe (CIPP) B. CIPP LINER SAMPLES 1. SAMPLE PREPARATION: The Contractor shall prepare samples of the installed CIPP liner for subsequent testing of its physical properties. Samples shall be prepared and tested using the flat plate sampling method in accordance with the procedures in Section 8.1 of ASTM F1216 or ASTM F2019, as is applicable. The sample will be constructed on the same materials (tube and resin/catalyst) as is used for that given liner installation. The flat plate sample shall be large enough to provide five sample specimens for each Short Term Flexural (Bending) properties as per ASTM D790 and ASTM D638 respectively. 2. SAMPLE TESTING. The cured sample shall be tested by an independent testing laboratory, as recommended by the CIPP liner manufacturer and approved by the Engineer, for the bending and tensile properties, as per ASTM D790 and ASTM D638 respectively. Final payment will not be made until test results are received. The Contractor shall be responsible for any deviation from the specified physical properties and those evaluated through testing. Failure to meet the specified physical properties will result in the CIPP liner being considered defective work which will be handled in accordance with MAG Section 106. The Contractor shall be responsible for all costs associated with the testing of the liner physical properties. 3. SAMPLING FREQUENCY: The above-stated sampling shall be performed for each separate installation of CIPP. For example: one flat plate sample from each individual pipeline liner installed. 4. WALL THICKNESS: The wall thickness of the material tube shall be ordered to the next calculated design thickness. Unless otherwise specified to provide for excess resin migration, the gap thickness of the wetting-out equipment shall be sized to allow an excess of 5 to 10 percent resin to pass during impregnation. The minimum wall thickness shall be determined at a minimum of three locations on a cut section of the CIPP flat plate sample using a method of measurement accurate to the nearest inch. The minimum value shall meet the requirements of Section C. CIPP LINER HANDLING Contractor shall exercise adequate care during transportation, handling, and installation to ensure the CIPP material is not torn, cut, or otherwise damaged. If any part or parts of the CIPP materials becomes torn, cut, or otherwise damaged before or during insertion, it shall be repaired or replaced in accordance with the manufacturer s recommendations and approval by the Engineer before proceeding further; and at the Contractor s expense. Page 3 of 12

4 D. WARRANTY: The Contractor shall warrant the completed work against defect in workmanship and material for a period of one year. The Engineer, while not acting as quality control agent for the Contractor, shall be allowed to view and document any portion of this contract, including but not limited to, verifying type and quantities of resin used at any point during this work. Finished and cured CIPP liner properties specified in Part 2 shall be tested as specified. Previous test data will not be acceptable SUBMITTALS The following submittals shall be provided: PART 2 PRODUCTS 2.01 GENERAL 1. Shop drawings which detail short and long term properties (providing all supporting rest data) of all component materials and construction and recommendations for material storage and temperature control, CIPP liner handling, insertion, curing, trimming and finishing. The submittal shall also include structural calculations for each CIPP liner size, the recommended thicknesses, and the method and equipment used to reinstate connecting sewers. 2. Detailed method for addressing sampling requirements. 3. CCTV Inspection reports as specified in Subsection Manufacturer s recommended installation procedures. 5. A safety plan is required prior to construction and shall include any applicable Material Safety Data Sheets (MSDS) sheets. A. All materials and installation procedures provided by the Contractor for use in the CIPP installation process shall be equal to or exceed the requirements of Sections 5 and 7 of ASTM F1216 or ASTM F2019 Section 5 and 6, as is applicable. B. Wrinkles in the finished liner pipe which cause a backwater of one (1) inch or more or reduce the hydraulic capacity of the pipe (wrinkles which exceed five (5) percent of the pipe diameter) are unacceptable and shall be removed or repaired by the Contractor at no additional cost to the Owner. Wrinkles in the finished liner pipe that reduce the structural stability of the pipe are unacceptable. If a void between the wrinkle and the pipe exists, the Contractor shall repair or replace that section of the pipe at no additional cost to the Owner. Methods of repair shall be proposed by the Contractor and submitted to the Engineer for review. C. Contractor shall be responsible for control of all material and process variables to provide a finished CIPP possessing the minimum properties specified in ASTM F1216 or ASTM F2019, as is applicable and supplemented herein. Page 4 of 12

5 2.02 MANUFACTURERS A. Approved CIPP liner manufacturers are LightStream, LP/StreamlinerUV, 2.03 CHEMICAL RESISTANCE A. DOMESTIC SEWAGE The chemical resistance tests should be completed in accordance with Test Method D543. Exposure should be for a minimum of one month at 73.4 degrees F. During this period, the CIPP test specimens should lose no more than 20 percent of their initial flexural strength and flexural modulus when tested in accordance with Section 8 of ASTM F1216 or ASTM F1743, whichever is applicable, when subjected to the following solutions: Chemical Solution Tap Water (ph 6-9) Nitric Acid Phosphoric Acid Sulfuric Acid Gasoline Vegetable Oil Detergent Soap Concentration, percent The Contractor shall be responsible for all costs associated with the chemical resistance tests. Proof of meeting these requirements shall be provided to the engineer for approval at least seven (7) days prior to commencement of work COMPONENT PROPERTIES A. FIBERGLASS TUBING The fiberglass tubing shall be made of non corrosion material and shall be free from tears, holes, cuts, foreign materials and other surface defects. B. RESINS The physical properties quoted in Section 2.05A apply to CIPP manufactured polyester or vinylester resin. Resins should be appropriate for conditions encountered FINISHED AND CURED CIPP LINER PROPERTIES A. The physical properties of the cured CIPP shall have minimum initial test values as given in Table 1 for polyester and vinylester resins. Properties for these or any other enhanced resins shall be substantiated with test data. Table 1. Standard Resin Test Property Test Value Test Method Page 5 of 12

6 Flexural strength Flexural modulus 25,000 psi 1,200,000 psi ASTM D790 ASTM D DIMENSIONS A. Contractor shall make allowances in determining the inliner tube length and circumference for stretch during installation and shrinkage during curing. The minimum length shall be that which continuously spans the distance from the center of the inlet manhole to the center of the outlet manhole. The Contractor shall verify the lengths in the field before the inliner tube is cut and impregnated. Individual installation runs may include one or more manhole-to-manhole sections as approved by the Engineer. Installation of the liner shall be through existing or new manholes. Excavation for liner insertion shall not be permitted except to replace the manhole cones, if necessary and/or required. B. The diameter of the existing pipes may be larger than the nominal inside diameter. It is the Contractor s responsibility to determine the required diameter of the liner. C. The maximum wall thickness shall be at least the calculated design thickness, or the minimum specified, to increase the diameter only as much as necessary DESIGN CRITERIA A. The liner shall be designed for a fully deteriorated pipe condition in accordance with the procedures of ASTM F1216, Appendix XI and these specifications. All material properties used in design calculations shall be long-term (time-corrected) values. The Contractor shall be familiar with the existing site conditions when preparing the liner design. B. Contractor shall prepare design calculations for approval prior to performing the lining work. The submitted design calculations shall provide the following information as a minimum: Project Number 2010UV Manhole to Manhole designation US MH # to DS MH # Pipe Nominal Diameter (inches) Minimum Liner thickness (mm) Proposed Liner Thickness (mm) The Contractor shall note that the actual level of deterioration may vary within any given section of sewer. Pipe ovalities should be, at a minimum, determined from screen measurements off the most recent TV inspection. If more advanced ovality data exists, such as from laser profiling, then this data will be used in lieu of screen measurements. C. The following parameters shall be assumed for the liner design: 1. Modulus of soil reaction, E' S = 700 psi (fully deteriorated) 2. Unit weight of soil = 120 pcf 3. The minimum ovality for straight runs shall be 2.0 percent 4. AASHTO H20 traffic loads 5. AREMA E-80 railroad loads Page 6 of 12

7 2.08 PRODUCT DATA 6. Groundwater elevation can be assumed at 50% of the distance between the pipe invert and the ground surface. 7. Factor of Safety, N= year design life A. Contractor shall provide the following for information only in accordance with Section 1.03: 1. Certification showing the Contractor is currently licensed by the appropriate licensor to perform CIPP installation. Certification shall be given to the Engineer before any materials are delivered to the job site. 2. Certification stating CIPP tube has been manufactured in accordance with ASTM F1216, ASTM F2019 or ASTM F1743, as applicable, is, and resin is, suitable for its intended use. 3. Test report of CIPP sample(s) and tests as specified in paragraph 1.02.B. and 2.04.A. 4. Warranty information. 5. Material safety data sheets for all hazardous chemicals used or expected to be onsite. At a minimum, sheets for the resin, catalyst, cleaners, and repair agents should be submitted. 6. Design calculations per 2.07-B above CIPP TERMINATION POINTS A. The Contractor shall provide shop drawings for approval detailing the proposed CIPP liner terminations in accordance with Specification 1.03: Submittals. Part 3 EXECUTION 3.01 INSTALLATION PROCEDURES A. GENERAL It is forbidden to wet-out inliner at the construction site because of external influences such as heat, no possibilities to control vacuum and correct mixture of resin. The Contractor shall ensure that the pressure inside of the CIPP tube exceeds the pressure due to groundwater. No contractor, or its subcontractor(s), shall perform any work without notifying MSD personnel for inspection. An MSD inspector or designated representative shall be on-site prior to installing lining materials and backfilling excavations. Notification shall be verbally given to the MSD Inspector preferably on the previous working day or no later than 7:30 A.M. on the day the work is to be performed. Daily notification shall include the location of work, nature of work, the crew, and the time it will be on-site. 1. Access to Municipal Water Supplies Page 7 of 12

8 The contractor shall obtain all the necessary permits and pay all fees required to use the various municipal water works supply systems. All costs for water usage shall be included in the various contract items. Water services to residents or other users of the municipal water works system shall not be shut off. Some municipalities may restrict water usage due to outside temperature or other issues. It is the contractor s responsibility to obtain the necessary permits and be aware of any restrictions prior to lining. Failure to comply with the rules for usage of the water works systems may result in denial of any use of the water works system facility. It is recommended that the contractor have other methods of getting water to the jobsite. Time extensions to the contract will not be written solely because of municipal water restrictions due to temperature. 2. Notification of Residents/Businesses It is the responsibility of the contractor to notify all residents and businesses that could be affected by the sewer reconstruction. Notification shall be given at least 36 hours prior to the start of the cleaning and lining operation. This notification shall consist of written information that outlines the process, explains all chemicals that shall be used and their effects and odors, and timing of the project. 3. Bypassing Flow a. Bypassing Sewage Flow. Bypassing sewage flow around the section(s) of sewer to be lined shall be performed by plugging the existing upstream manhole or adjacent sewer system and pumping the sewage to the next unaffected downstream manhole. Pump and bypass lines shall be of adequate capacity and size to handle the flow without sewer backup. Hoses and fittings shall be in good condition, without holes, so as not to cause sewage spills. Sewer service connections within the section to be lined shall be maintained by the contractor as required or temporarily taken out of service to permit lining. The contractor shall be responsible for the continuity of sewage flows and sewer service to each facility connected to the sewer section being lined during the execution of the work. If sewage overflows or backup occurs and enters buildings, the contractor shall notify the MSD Project Manager immediately. The contractor shall be responsible for cleanup, repair, and property damage costs and claims. A copy of a written release shall be furnished to the MSD Project Manager. The contractor and its subcontractor(s) shall coordinate setup to minimize duplicating bypassing efforts. b. Maintaining Flow. It shall be the responsibility of the contractor, throughout the tenure of this contract, to provide and maintain sufficient flow at all times to pass any flash of storm flow of drainage ditches and prevent any backwater flooding due to obstruction caused by construction equipment or materials. The contractor shall be responsible for prohibiting storm or subsurface water from entering the sanitary sewer during lining operations as may be caused by flash floods, high creek waters, heavy rains, etc. B. SEWER CLEANING Page 8 of 12

9 1. The contractor shall attempt to clean every segment of sewer to be lined. 2. In general, protrusions (deposits, break-in taps, roots, etc.) greater than 5% of the host pipe diameter shall be removed. 3. The contractor shall immediately notify the MSD Project Manager if he believes the cleaning will cause a sewer collapse due to the existing deterioration of the host pipe. C. INSTALLATION The liner will be installed by the pull/winch method. It is the contractor s responsibility to ensure that at no time does resin come into contact with the groundwater thus creating an environmental issue. Preparing the old pipe or inversion of a preliner is part of the installation and is included without any additional costs. 1. Pull/Winch Method: Before pulling the inliner in a protective foil has to be installed. The inliner tube shall be impregnated with resin and lowered into the manhole. The tube shall then be pulled into position within the existing pipe with the aid of a power winch that is equipped with a device to monitor the force and prevent excessive tension and tube elongation as determined by the liner manufacturer. The pipe shall then be inflated with air. The inliner has to be inspected immediately before starting the curing process. D. CURING Pre-curing video inspection of the inflated liner must be recorded. Curing must be done under UV Light only. The curing process shall follow a step cure or similar approach recommended by the manufacturer and approved by the Engineer, and shall be held at the top step for an adequate length of time as determined by the liner manufacturer to ensure that the design physical properties are attained. Pressure, temperature and curing process shall be monitored by both, computer and video at any time as determined by the liner manufacturer FINISHED PRODUCT A. FINISH The finished CIPP shall be continuous over the entire length of an installation run. Defects such as foreign inclusions, dry spots, pinholes, delamination, and wrinkling beyond the specification allowances, determined by the Engineer as affecting the integrity or strength of the CIPP, or as adversely affecting the hydraulic capacity of the CIPP, shall be repaired or replaced at the Contractor s expense. B. SERVICE CONNECTIONS After the curing is complete, existing lateral service connections shall be fully re-established. The service opening shall have no jagged edges and shall be sanded smooth. Page 9 of 12

10 C. INSPECTION The Contractor shall inspect the CIPP after installation. The inspection will be performed and recorded using closed circuit television equipment in accordance with the PACP standard. If defects or voids exist as described in Section 2.01, the Contractor shall repair or replace that section of the pipe at no additional cost to the Owner. Methods of repair shall be proposed by the Contractor and submitted to the Engineer for review. All CCTV inspection work shall be performed in accordance with NASSCO s Pipeline Assessment and Certification Program (PACP). The entire inspection survey shall be recorded in MPEG-1 format written to DVD and submitted with digital links to the surveys CLEANUP A. Following inspection, the Contractor shall clean up the entire project area. The Contractor shall dispose of all excess material and debris not incorporated into the permanent installation off-site CONTRACTOR QUALIFICATIONS A. GENERAL The CONTRACTOR shall demonstrate that a minimum of five (5) miles, on a single project, of work similar in scope, has been successfully performed by the CONTRACTOR. The CONTRACTOR s Project Manager and Superintendent shall be assigned full time to this project and be present in the City while WORK is being performed. The proposed Rehabilitation process shall be proven technology, which is defined as a minimum of 25,000 linear feet of successful wastewater or Stormwater collection system installations in the U.S. and must be documented to the satisfaction of the Owner. The Rehabilitation installation work done under this specification shall be subject to inspection by the CONSTRUCTION MANAGER. All parts of the work shall be accessible to the CONTRACT MANAGER. Defective work shall be corrected to the satisfaction of the CONTRACT MANAGER PRE-AWARD SUBMITTALS A. Contractor s Experience Within ten (10) calendar days of issuance of Notice of Apparent Low Bidder, the CONTRACTOR shall submit contractual required documentation that a minimum of five (5) miles, on a single project, of work similar in scope, has been successfully performed by the CONTRACTOR and its personnel assigned to the liner installation and curing, utilizing the CONTRACTOR S proposed rehabilitation system for this project according to the requirements in section The CONTRACTOR shall identify the employees i.e. Project Manager, Superintendent, Foreman, etc.; that will be assigned to this project and provide references. The CONTRACTOR S Project Manager and Superintendent shall be assigned full time to this project and be present in the City while work is being performed. Page 10 of 12

11 B. Past Projects Documentation Within ten (10) calendar days of issuance of Notice of Apparent Low Bidder, the CONTRACTOR shall submit contractual required documentation of 25,000 linear feet of successful wastewater or Stormwater collection system installations in the U.S. of the proposed rehabilitation process to satisfy the contractual requirement of the products commercial viability and CONTRACTOR capability. C. Manufacturer Certification Within ten (10) calendar days of issuance of Notice of Apparent Low Bidder, the CONTRACTOR shall submit manufacturer s certificate(s) indicating that the supplied lining materials for storm drains, sewer mains and sewer lateral connections meet the requirements of the Specifications, ASTM standards and a certificate of compliance from an independent third party lab. D. Manufacturer License The installation of the sewer lining and lining of the service connections shall be performed by a Contractor licensed/certified by the manufacture/owner of the process. The Apparent Low Bidder is required to submit within ten (10) calendar days of receipt of the Notice of Apparent Low Bidder a copy of the license from all manufacturers for which they are licensed/certified and a letter from the manufacturer(s) stating the name, address, point of contact, and telephone number for City s verification. Page 11 of 12

12 Appendix A File # US Manhole DS Manhole Political Subdivision Cincinnati Neighborhood Pipe Size Number of Taps Project Address Slope 001/10U KINDEL AV CINCINNATI WEST END * 002/10U KINDEL AV CINCINNATI WEST END /10U COLERAIN AV CINCINNATI WEST END /10U FORESTOAK CT CINCINNATI HYDE PARK /10U FORESTOAK CT CINCINNATI HYDE PARK /10U FORESTOAK CT CINCINNATI HYDE PARK /10U OLD RED BANK RD CINCINNATI HYDE PARK Lineal Feet *Estimated TOTALS Page 12 of 12