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Home My WebLink About33-3100-Sanitary-Utilities-Sewerage-Piping_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 1 of 10 33 3100 Sanitary Utility Sewerage Piping PART 1 – GENERAL 1.1 GENERAL PROVISIONS A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections within DIVISION 01 - GENERAL REQUIREMENTS which are hereby made a part of this Section of the Specifications. 1.2 DESCRIPTION OF WORK A. Work Included: Provide labor, materials, and equipment necessary to complete the work of this Section, including but not limited to the following: 1. Install and test polyvinyl chloride (PVC) sewer pipe, complete as shown on the Drawings and as specified herein. 2. Pipe or piping refers to all pipe, fittings, material, and appurtenances required to construct PVC gravity and pressure sewer pipe complete, in place. B. Related Work: The following items are not included in this Section and will be performed under the designated Sections: 1. Section 31 0000 - EARTH MOVING: Soil for backfill in trenches. 2. Provision of waste management: Section 01 7419, Construction of Waste Management Plan. 3. Provision of General LEED requirements and forms: 01 8113 Sustainable Design Requirements. 1.3 REFERENCES A. American Association of State Highway and Transportation Officials: 1. AASHTO T180 - Standard Specification for Moisture-Density Relations of Soils Using a 10 lb. Rammer and an 18 in. Drop. B. ASTM International: 1. ASTM D1784 - Standard Specification for Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Rigid Poly (Vinyl Chloride) (CPVC) Compounds 2. ASTM D1785 - Standard Specification for Poly Vinyl Chloride (PVC) Plastic Pipe, Schedules 40, 80, and 120. 3. ASTM D2241 - Standard Specification for Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series) 4. ASTM D2321 - Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 2 of 10 5. ASTM D2466 - Standard Specification for Poly Vinyl Chloride (PVC) Plastic Pipe Fittings, Schedule 40. 6. ASTM D2564 - Standard Specification for Solvent Cements for Poly Vinyl Chloride (PVC) Plastic Piping Systems. 7. ASTM D2729 - Standard Specification for Poly Vinyl Chloride (PVC) Sewer Pipe and Fittings. 8. ASTM D2855 - Standard Practice for Making Solvent-Cemented Joints with Poly Vinyl Chloride (PVC) Pipe and Fittings. 9. ASTM D2922 - Standard Test Method for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth). 10. ASTM D3034 - Standard Specification for Type PSM Poly Vinyl Chloride (PVC) Sewer Pipe and Fittings. 11. ASTM D3139 - Standard Specification for Joints for Plastic Pressure Pipes using Flexible Elastomeric Seals 12. ASTM D3212 - Standard Specification for Joints for Drain and Sewer Plastic Pipes Using Flexible Elastomeric Seals 13. ASTM F477 - Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe. 14. ASTM F789 - Standard Specification of Type PS-46 Poly (Vinyl Chloride) (PVC) Plastic Gravity Flow Sewer Pipe and Fittings. 1.4 DEFINITIONS A. Bedding: Fill placed under, beside and directly over pipe, prior to subsequent backfill operations. 1.5 SUBMITTALS A. Section 01 3300 - Submittal Procedures: Requirements for submittals. B. Product Data: Submit data indicating pipe material used, pipe accessories, and fittings. C. Manufacturer's Installation Instructions: Indicate special procedures required to install Products specified. D. Manufacturer's Certificate: Certify products meet or exceed specified requirements. 1.6 CLOSEOUT SUBMITTALS A. Section 01 7700 - CLOSEOUT PROCEDURES. B. Project Record Documents: Record location of pipe runs, connections, manholes, cleanouts, and invert in and invert out elevations. C. Identify and describe unexpected variations to subsoil conditions or discovery of uncharted utilities. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 3 of 10 1.7 QUALITY ASSURANCE A. All PVC sewer pipe shall be from a single manufacturer. The supplier shall be responsible for the provision of all test requirements specified in ASTM D3034 or ASTM F789 as applicable. In addition, all PVC pipe to be installed under this Contract may be inspected at the plant for compliance with these Specifications by an independent testing laboratory provided by the Owner. The Contractor shall require the manufacturer’s cooperation in these inspections. The cost of plant inspection of all pipe approved for this Contractor, plus the cost of inspection of a reasonable amount of disapproved pipe, will be borne by the Owner. B. Inspections of the pipe may also be made by the Engineer or other representatives of the Owner after delivery. The pipe shall be subject to rejection at any time on account of failure to meet any of the Specification requirements, even though the sample pipes may have been accepted as satisfactory at the place of manufacture. Pipe rejected after delivery shall be marked for identification and shall be removed from the job at once. 1.8 DELIVERY, STORAGE, AND HANDLING A. All items shall be bundled or packaged in such a manner as to provide adequate protection of the ends during transportation to the site. Any pipe damaged in shipment shall be replaced as directed by the Engineer. B. PVC items deteriorate in sunlight and are slightly brittle, especially at lower temperatures, so care shall be taken in loading, transporting, and unloading items to prevent damage to the items. All items shall be examined before installation and no piece shall be installed which is found to be defective. Handling and installation of pipe and fittings shall be in accordance with the manufacturer’s instructions, references standards, and as specified herein. C. Any pipe or fitting showing a crack or which has received a blow that may have caused an incident fracture, even though no such fracture can be seen, shall be marked as rejected and removed at once from the work site. D. While stored, pipe shall be adequately supported from below at not more than 3 foot intervals to prevent deformation. The pipe shall not be stacked higher than 6 feet. E. Pipe and fittings shall be stored in a manner which will keep them at ambient outdoor temperatures and out of the sunlight. Temporary shading to meet this requirement shall be provided. Simple covering of the pipe and fittings which allows temperature buildup or direct or indirect sunlight shall not be permitted. F. If any defective item is discovered after it has been installed, it shall be removed and replaced with an exact replacement item in a satisfactory manner by the Contractor, at the Contractor’s own expense. All pipe and fittings shall be thoroughly cleaned before installation and the interior shall be kept clean until testing. G. In handling the items, use special devices and methods as to achieve the results specified herein. No un-cushioned devices shall be used in handling the item. 1.9 PRE-INSTALLATION MEETINGS A. Convene minimum one week prior to commencing work of this section. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 4 of 10 1.10 FIELD MEASUREMENT A. Verify field measurements and elevations are as indicated. 1.11 COORDINATION A. Coordinate the Work with abandonment of existing septic tanks and associated piping, and abandonment of existing leaching fields. PART 2 - PRODUCTS 2.1 SANITARY SEWAGE GRAVITY PIPE A. Plastic Pipe: ASTM D3034, Type PSM, SDR 35, Poly Vinyl Chloride (PVC) material; inside nominal diameter of 8 in., bell and spigot style rubber ring sealed gasket joint. 1. Fittings: PVC. 2. Push On Joints: ASTM F477, elastomeric gaskets per ASTM D3212, securely locked into place to prevent displacement during assembly. 3. All fittings and accessories for sewer shall have bell and/or spigot configurations compatible with the pipe. 2.2 SANITARY SEWAGE PRESSURE PIPE A. All Polyvinyl Chloride (PVC) pressure pipe and fittings used in the construction of force mains shall be rated for a minimum of 150 psi. 1. Fittings: PVC. Push-on joints shall conform to AWWA C900, C905. a. Joints to mechanical ductile iron fittings shall comply with the requirements for ductile iron pipe, except the mechanical joint restraint gland shall be specifically designed for use with PVC pipe. 2. Push-on gaskets for pipe, ASTM F477 3. All fittings and accessories for sewer shall have bell and/or spigot configurations compatible with the pipe. 2.3 UNDERGROUND PIPE MARKERS A. Manufacturers: 1. Any manufacturers of such products shall be considered. 2. Substitutions: Refer to Section 01 6000 - PRODUCT REQUIREMENTS. B. Plastic Ribbon Tape: Bright colored, imprinted with "Sewer Line” in large letters, minimum 6 inches wide by 4 mil. thick, manufactured for direct burial service. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 5 of 10 2.4 MANHOLES A. In accordance with Section 33 0513 - MANHOLES AND STRUCTURES 2.5 BEDDING AND COVER MATERIALS A. Bedding and Cover: 3/4 inch crushed stone in accordance with Section M2.01.4 of the MHD Standard Specifications. B. Soil Backfill from Above Pipe: In pavement areas where controlled density fill is not specified, provide Ordinary Fill to the sub-base of the pavement, and then provide the required sub-base material for the pavement section. In grassed areas where controlled density fill is not specified, provide Special Borrow per MassDOT Spec. M1.02.0 to a point 6 inches below finished grade, then Manufactured Topsoil to finished grade. PART 3 - EXECUTION 3.1 EXAMINATION A. Verify existing conditions before starting work. B. Verify trench cut is ready to receive work and excavations, dimensions, and elevations are as indicated on the Drawings. 3.2 PREPARATION A. Correct over excavation with coarse aggregate. B. Remove large stones or other hard matter which could damage pipe or impede consistent backfilling or compaction. 3.3 BEDDING A. Excavate pipe trench in accordance with Section 31 0000 - EARTHWORK. B. Place bedding material at trench bottom, level materials in continuous layer not exceeding 6 inches. C. Maintain optimum moisture content of bedding material to attain required compaction density. 3.4 INSTALLATION OF PVC PIPE AND FITTINGS A. No single piece of pipe shall be laid unless it is straight. The centerline of the pipe shall not deviate from a straight line drawn between the centers of the opening at the ends of the pip by more than 1/16 inch per foot of length. If a piece of pipe fails to meet this required check for straightness, it shall be rejected and removed from the site. Laying instructions of the pipe shall be explicitly followed. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 6 of 10 B. If any defective pipe is discovered after it has been installed, it shall be removed and replaced with a sound pipe in a satisfactory manner at no additional cost to the Owner. All pipe and fittings shall be thoroughly cleaned before installation, shall be kept clean until they are used in the work, and when laid shall conform to the lines and grades required. PVC pipe and fittings shall be installed in accordance with requirements of the manufacturer, ASTM D2321 or as otherwise provided herein. C. As soon as the excavation is complete to normal grade of the bottom of the trench, bedding shall be placed, compacted, and graded to provide firm, uniform and continuous support for the pipe. Bell holes shall be excavated so that only the barrel of the pipe bears upon the bedding. The pipe shall be lad accurately to the lines and grades indicated on the Drawings. Blocking under the pipe shall not be permitted. Bedding shall be placed evenly on each side of the pipe to mid-diameter and hand tools shall be used to force the bedding under the haunches of the pipe and into the bell holes to give firm, continuous support for the pipe. The initial 3 feet of backfill above the bedding shall be placed in 1 foot layers and carefully compacted, where controlled density fill is not specified. Generally, the compaction shall be done evenly on each side of the pipe and compaction equipment shall not be operated directly over the pipe until sufficient backfill has been placed to ensure that such compaction equipment will not have a damaging effect on the pipe. Equipment used in compacting the initial 3 feet of backfill shall be approved by the pipe manufacturer prior to use. D. All pipe shall be sound and clean before installation. When installation is not in progress, including lunchtime, the open ends of the pipe shall be closed by watertight plug or other approved means. Good alignment shall be preserved during installation. The deflection at joints shall not exceed that recommended by the manufacturer. Fittings, in addition to those shown on the plans, shall be provided, if required, in crossing utilities which may be encountered upon opening the trench. E. When cutting pipe is required, the cutting shall be done by machine, leaving a smooth cut at right angles to the axis of the pipe. Cut ends of the pipe to be used with a bell shall be beveled to the manufactured spigot end. F. The Engineer may examine each bell and spigot end to determine whether any preformed joint has been damaged prior to installation. Any pipe having defective joint surfaces shall be rejected, marked as such and immediately removed from the job site. G. Each length of the pipe shall have the assembly mark aligned with the pipe previously laid and held securely until enough backfill has been placed to hold the pipe in place. Joints shall not be ‘pulled’ or ‘cramped.’ H. Before any joint is made, the pipe shall be checked to assure that a close joint with the next adjoining pipe has been maintained and that the inverts are matched and conform to the required grade. The pipe shall not be driven down to grade by striking it. I. Precautions shall be taken to prevent flotation of the pipe in the trench. J. When moveable trench bracing such as trench boxes, moveable sheeting, shoring or plates are used to support the sides of the trench, care shall be taken in placing and moving the boxes or supporting bracing to prevent movement of the pipe bedding and the backfill. Trench boxes, moveable sheeting, shoring or plates shall not be allowed to extend below the top of the pipe. If trench boxes, moveable sheeting, shoring or plates have been installed below the top of the pipe, they shall be moved slowly taking care not to disturb pipe, bedding, or backfill. As trench boxes, moveable sheeting, shoring or plates are moved, pipe bedding shall be placed to fill any Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 7 of 10 voids created and the backfill shall be re-compacted to provide uniform side support for the pipe. 3.5 JOINTING PVC PIPE (PUSH ON TYPE) A. Joints shall be made in strict accordance with the manufacturer’s instructions. Pipe shall be laid with bell ends looking ahead (upgradient of the spigot end). A rubber gasket shall be inserted in the groove of the belled end and the joint surfaces cleaned and lubricated. The plain edge of the pipe to be entered shall then be inserted in alignment with the bell of the pipe to which is it to be jointed and pushed home with a come-along or by other means. Check that the reference mark on the spigot is flush with the end of the bell. 3.6 JOINTING PVC SEWER PIPE AND FITTINGS A. PVC sewer pipe and fittings shall be jointed in accordance with the recommendations of the latest ASTM standards and detailed instructions of the manufacturer. The pipe manufacturer shall furnish information and supervise the installation of at least the first five joints. B. All manhole connections shall be as shown on the Drawings except that concrete and mortared connections shall be equipped with an integral o-ring or other sealant such that a positive watertight seal is established. 3.7 SERVICE CONNECTIONS A. Service connections shall be installed at a minimum slope of 2% at the locations and to the limits determined by the Engineer in the field. In each case the end shall be capped, backed with a #2 reinforcing rod welded to a 6 inch x 6-1/4 inch steel plate extending to 6 inches below the finished ground surface as shown on the Drawings. B. Service connections shall be 8 in. diameter PVC unless otherwise shown on the Drawings. C. Service connections shall be made at a point 10 feet outside the foundation of the building in accordance with the Uniform Plumbing Code. If the existing building surface is in structurally deficient condition or constructed of a material not approved by the plumbing inspector, the Contractor shall stop work immediately and contact the Engineer. 3.8 INSTALLATION - MANHOLES A. In accordance with Section 33 0513 – MANHOLES AND STRUCTURES 3.9 FIELD QUALITY CONTROL A. Refer to Sections 01 4000 - QUALITY REQUIREMENTS, 017300 - EXECUTION REQUIREMENTS, and 01 7700 - CLOSEOUT PROCEDURES. B. Perform test on site sanitary sewage system in accordance with municipal standards. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 8 of 10 C. Request inspection by Engineer prior to and immediately after placing bedding and piping. Provide minimum 24 hours notice. The Board of Health will inspect all work prior to issuing its approval. The Board of Health shall be given a minimum of 24 hours advance notice when requesting an inspection. The Contractor shall comply with all inspection requirements of the Town of Yarmouth. D. Compaction Testing: In accordance with ASTM D1557. E. When tests indicate Work does not meet specified requirements, remove work, replace and retest. F. Frequency of Compaction Tests: As directed by Engineer. 3.10 PROTECTION OF FINISHED WORK A. Protect pipe and aggregate cover from damage or displacement until backfilling operation is in progress. 3.11 TESTING (GRAVITY PIPELINES) A. Deflection testing of pipe shall be specified as follows: 1. Pipe deflection measured not less than 90 days after the backfill has been completed as specified shall not exceed 5%. Deflection shall be computed by multiplying the amount of deflection (nominal diameter less minimum diameter when measured) by 100 and dividing by the nominal diameter of the pipe. 2. Deflection shall be measured by a rigid mandrel (Go/No Go) device cylindrical in shape with a minimum of nine or ten evenly spaced arms or prongs. Drawings of the mandrel with complete dimensions shall be submitted to the Engineer for each diameter of pipe to be tested. The mandrel shall be hand pulled through all sewer lines. 3. Any section of sewer not passing the mandrel shall be uncovered at no additional cost to the Owner and the bedding and backfill replaced to prevent excessive deflection. Repaired pipe shall be retested at no additional cost to the Owner. Retested pipe shall not deflect more than 5%. B. Low pressure air testing of pipe shall be specified as follows: 1. For making the low-pressure air tests, use equipment specifically designed and manufactured for the purpose of testing sewer pipelines using low-pressure air. The equipment shall be provided with an air regulator valve or air safety so set that the internal air pressure in the pipeline cannot exceed 8 psig. 2. The leakage test using low pressure air shall be made on each manhole-to-manhole section of pipelines after placement of the backfill. 3. Pneumatic plugs shall have a sealing length equal to or greater than the diameter of the pipe to be tested. Pneumatic plugs shall resist internal test pressures without requiring external bracing or blocking. 4. All air used shall pass through a single control panel. 5. Low-pressure air shall be introduced into the sealed line until the internal air pressure reaches 4 psig greater than the minimum pressure exerted by the groundwater that may be above the invert at the pipe at the time of the test. However, the internal air pressure in the sealed line shall not be allowed to exceed 8 psig. When the maximum pressure Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 9 of 10 exerted by the groundwater is greater than 4 psig, conduct only an infiltration test, as specified below. 6. Testing shall be in accordance with the requirements of ASTM F1417-92. The following italicized text contains selected text from ASTM F1417 (Gravity Sewer Lines). • The section of the line to be tested is plugged. Air, at low pressure, is introduced into the plugged line. The line passes the test if the rate of air loss, as measured by pressure drop, does not exceed a specified amount in a specified time. • Pressure drop may be determined by using Table 1 or calculated by use of the formulas below. TABLE 1: MINIMUM SPECIFIED TIME REQUIRED FOR A 0.5 PSIG PRESSURE DROP FOR SIZE AND LENGTH OF PIPE INDICATED FOR Q = 0.0015 (NOTE-CONSULT WITH PIPE AND APPURTENANCE MANUFACTURER FOR MAXIMUM TEST PRESSURE FOR PIPE SIZE GREATER THAN 30 IN. IN DIAMETER.) Pipe Diamete r Minimu m Time, min:sec Length for Min. Time, ft Time for Longer Length, s Specification Time for Length (L) Shown, min:s 100 150 ft 200 ft 250 ft 300 ft 350 ft 400 ft 450 ft 4 1:53 597 0.190 L 1:53 1:53 1:53 1:53 1:53 1:53 1:53 1:53 6 2:50 398 0.427 L 2:50 2:50 2:50 2:50 2:50 2:50 2:51 3.12 8 3:47 298 0.760 L 3:47 3:47 3:47 3:47 3:48 4:26 5.04 5.42 10 4:43 239 1.187 L 4:43 4:43 4:43 4:57 5:56 6:55 7.54 8.54 12 5:40 199 1.709 L 5:40 5:40 5:42 7:08 8:33 9:58 11.24 12.50 15 7:05 159 2.671 L 7:05 7:05 8:54 11:08 13:21 15:35 17.48 20.02 18 8:30 133 3.846 L 8:30 9:37 12:49 16:01 19:14 22:26 25.38 28.51 21 9:55 114 5.235 L 9:55 13:05 17:27 21:49 28:11 30:32 34.54 39.16 24 11:20 99 6.837 L 11:2 17:57 22:48 28:30 34:11 39:53 45.35 51.17 27 12:45 88 8.653 L 14:2 21:38 28:51 36:04 43:18 50:30 57.42 64.54 30 14:10 80 10.683 L 17:4 26:43 35:37 44:31 53:25 62:19 71.13 80.07 33 15:35 72 12.926 L 21:3 32:19 43:56 53:52 64:38 75:24 86.10 96.57 36 17:00 66 15.384 L 25:3 38:28 51:17 64:06 76:55 89:44 102.3 115.2 • Calculate all test times by the following formula: T= 0.085 DK/Q, where: T = shortest time allowed for the air pressure to drop 1.0 psig, K = 0.000419 DL but not less than 1.0, Q = leak rate in cubic feet/minute/square feet of internal surface = 0.0015 CFM/SF, D = measured average inside diameter of sewer pipe (see Method D 2122 and Practice D 3567), in., and L = length of test section, ft. • Table 1 contains the specified minimum times required for a 1.00 psig pressure drop from a starting pressure of 3.5 psig to a final pressure of 2.5 psig using a leakage rate of 0.0015 ft3/min/ft2 of internal surface. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 3100 Sanitary Utility Sewerage Piping 10 of 10 C. Infiltration testing of pipe shall only be carried out when the depth of groundwater is so great that low pressure air testing cannot be adequately performed; otherwise low pressure air testing shall be performed as specified above. The procedure for infiltration testing of pipe is as follows: 1. For making the infiltration tests, underdrains, if used, shall be plugged and other groundwater drainage shall be stopped to permit groundwater to return to its normal level insofar as practicable. 2. Upon completion of a section of the sewer, dewater it and conduct a satisfactory test to measure the infiltration for at least 24 hours. The amount of infiltration, including manholes, tees, and connections, shall not exceed 200 gallons per inch diameter per mile of sewer per 24 hours. END SECTION