615.01 Sanitary Sewer Pipe Conduits
566 Protect instrumentation devices. Replace dama ged instrumentation devices at no additional cost to the Department.
C.Strip Drains Lay strip drains flat and straight with minimal slack. Place strip drain products with a hard back and protrusions so the core back lies next to the ground with the studs pointing up. Ensure splices are neat and made in accordance with the manufacturer's recommendations using kits provided by the manufacturer. Secure the wick or strip drains and ensure the drains remain connected and in place throughout the construction process. Use end dumping for the first layer of embankment to avoid damage to the drains from equipment traffic. Construct a 2 ft [0.6 m] “bridge lift” over the horizontal drains using low ground pressure equipment and light compaction.
614.05 Method of M Easurement
The Resident Engineer will measure the length of prefabricated strip and wick drains (including trial drains) along the centerline of the drain.
614.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.PREFABRICATED WICK DRAIN Linear Foot [Meter]
B.PREFABRICATED STRIP DRAIN Linear Foot [Meter] The Department will pay for the volume of work platforms as Unclassified Borrow or Unclassified Excavation in accordance with Section 202, "Earthwork." Include the cost of auguring stiff soils to be included in the contract unit price for Prefabricated Wick Drain.
615.01 Description
This work consists of constructing sanitary sewer pipe. Refer to the Oklahoma Department of Environmental Q uality (ODEQ) Regulations, the manufacturers’ recommendations, ASTM, ANSI, AWWA, and the Public Utility for whom the work is to be performed for additional specifications. The Special Provisions, Plans, Public Utility Specifications, Supplemental, or Stan dard Specification will govern over the ODEQ minimum regulations. SANITARY SEWER PIPE CONDUITS 615.04 567 615.02 MATERIALS Provide materials in accordance with the requirements of the facility owner, and in accordance to the Plan notes. Mark the pipe with the appropriate specification number ( e.g. AASHTO, ASTM, ANSI, NSF, AWWA).
A.Pipe Before delivery to the jobsite, subject concrete pipe to an in -plant hydrostatic test of 10 psi [70 kPa] in accordance with ANSI/ASTM C 497. Coat concrete sanitary sewer pipe with two coats of coal tar base pai nt, each at least 16 mil [0.40 mm] thick. Allow each coat to dry for 24 hr. Provide plastic pipe bearing the seal of the National Sanitation Foundation (NSF) with a Standard Dimension Ratio (SDR) no greater than 35. Use cast -in-place reinforced concrete b oxes as an alternative for sanitary sewer installations. Ensure the precast concrete boxes pass the same hydrostatic test.
B.Joints Provide joints in accordance with Section 726, “Drainage Conduits,” except, make joints with a single natural rubber or neoprene gasket, or O -ring, in accordance with the manufacturer’s recommendations. Provide reinforced concrete pipe joints in accordance with ANSI/ASTM C 443, with a 1:1 cement mortar collar formed using a diaper. Make joints with a single natural rubber or neoprene gasket, or O - ring, in accordance with the manufacturer’s recommendations. Provide vitrified clay pipe joints in accordance with ANSI/ASTM C 425. Ensure Polyvinyl Chloride (PVC) pipe, fittings, and in -line tees dimensionally conform to ASTM D 3034, with an SDR of 35.
615.03 Equipment — Vacant
615.04 Construction Methods
A.General Begin construction of pipe conduits at the outlet or low point of the line. If the construction involves the buildi ng of a main or submain pipe conduit with one or more laterals or tributaries, start construction of tributary lines after completing the main or submain pipe conduit to the point at which the tributary or laterals discharge into it. Make provision for the sewerage of the system during construction. Connect sanitary sewers or sewer appurtenances to other sanitary sewers or to sewer appurtenances as shown on the Plans, or approved by the Resident Engineer. Do not allow sewer pipe to project beyond the insi de wall line of other sewers or sewer appurtenances.
1.Setting Grade Lines Use the grade line shown on the Plans, Supplemental Drawings, or established by the Resident Engineer as the elevation of the invert or flowline of the sewer. Establish the grade line and
615.04 Sanitary Sewer Pipe Conduits
568 alignment using batterboards and a top line. When placing pipe, maintain a top line over a span of three -grade stakes. As each batterboard is erected, sight the top line to ensure the accuracy of the grade stakes and the batterboard setting. E nsure the Inspector is alerted of errors, discrepancies, or displacement of grade stakes.
2.Using a Laser Device Establish the batterboards at intervals of no more than 25 ft [7.5 m]. If a laser device establishes line and grade, increase the batterboar d interval to 50 ft [15 m]. Always set the first batterboard at 25 ft [7.5 m] when laying out a manhole or appurtenance.
3.Accommodating Water Mains Separate sanitary sewers and water mains vertically and horizontally in accordance with the ODEQ regulat ions. Horizontally place the sewer at least 10 ft [3 m] from existing or proposed water mains and 50 ft [15 m] from potable water wells. Where sewers cross water mains (either above or below), provide a vertical clearance of at least 2 ft [0.60 m]. If a water main crosses under a sewer provide structural support to the sewer. Install sewer pipe joints at least 10 ft [3 m] from water lines, unless otherwise approved by the Resident Engineer. When impossible to meet these horizontal and vertical separati on requirements, construct and pressure test the sewer line to ensure it is watertight before backfilling.
4.Closing Dead Ends Seal the dead ends of sewers, wyes, and tees by cementing stoppers in place when constructing ends. Securely place tight -fitting watertight stoppers or bulkheads in or across the end of sanitary sewer lines.
B.Excavation Excavate in accordance with Subsection 613.04.B, “Excavation.”
C.Bedding Place bedding in accordance with Subsection 613.04.C, “Bedding.”
D.Placing Pipe Place pipe in accordance with Subsection 613.04.G, “Placing Pipe.”
E.Joining Pipe Conduit Construct joints in accordance with the manufacturer’s recommendations. Before joining pipes, clean and dry the surfaces of the joint surface of the pipe. Keep trenches free of water until the joints become water tight. Avoid realigning the pipe after completing the joint unless the pipe is removed and a new joint is constructed.
F.Backfilling Backfill in accordance with Subsection 613.04.I, “Backfilling.” SANITARY SEWER PIPE CONDUITS 615.06 569 G. Field Testing Provide written notification to the Resident Engineer 24 hr before testing. Leaka ge tests may include water or low pressure air testing. Ensure outward or inward leakage, exfiltration or infiltration, does not exceed 200 gal per 1 in [1,860 L per 100 mm] of pipe diameter per mile [kilometer] per day. Perform an exfiltration or infilt ration test with a positive head of at least 2 ft [0.60 m]. Conduct deflection tests on flexible pipes at least 30 days after placing the final backfill. Ensure the pipe deflection does not exceed 5 percent. Make the deflection test with a rigid ball or mandrel with a diameter equal to 95 percent of the inside diameter of the pipe. Do not use mechanical pulling devices, unless otherwise approved by the Resident Engineer. Perform lamping in the presence of the Inspector. As required by OSHA regulations, use explosion -proof devices to provide a mechanical method of exchanging the air within the sewer line. Correct the pipe alignment as directed by the Resident Engineer at no additional cost to the Department. Ensure three -quarters of the pipe barrel is v isible from manhole to manhole or appurtenance.
H.Inspection The public utility will assign a representative to the Project to coordinate compliance with the utility specifications. The utilities’ representative will answer to the Resident Engineer. Dir ect all negotiations, decisions, instructions, interpretations, and matters influencing the work to the Resident Engineer.
615.05 Method of Measuremen T
The Resident Engineer will measure the length of Polyvinyl Chloride (PVC) Pipe and Sanitary Sewer Servic e Line along the pipe center and grade lines. The Resident Engineer will include the length of the riser pipe in the measurement for Sanitary Sewer Service Line . The Resident Engineer will not include the following for measurement: The length of line with in manholes and special structures. The length of vertical pipe or fittings required for drop manholes.
615.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.POLYVINYL CHLORIDE (PVC) PIPE Linear Foot [Meter]
B.SANITARY SEWER SERVICE CONNECTION Each
C.SANITARY SEWER SERVICE LINE Linear Foot [Meter] Include the cost of installing an in -line tee and bracing for riser pipe to be included in the contract unit price for Sanitary Sewer Service Connection .
616.02 Water Pipe and Fittings
570 Include the cost of the line within manholes and special structures, the vertical pipe or fittings required for drop manholes, earth backfi ll, sheeting, shoring, and concrete cradles to be included in the contract unit price for the relevant pay item. Include the cost of all fittings and adaptors to connect service to the existing line to be included in the contract unit price for Sanitary Se wer Service Line . Include the cost of testing to be included in the contract unit price for the relevant pay item. SECTION 616 WATER PIPE AND FITTINGS
616.01 Description
This work consists of constructing wat erlines and service lines.
616.02 Materials
Provide materials in accordance with Section 733, “Miscellaneous Materials,” or as required by the facility owner.
A.Pipe Provide pipe as shown on the Plans with AASHTO, ASTM, ANSI or AWWA specifications numbers for quality control and installation. Provide pipe or fittings with a pressure rating of at least 200 psi [1.4 MPa]. Provide plastic pipe bearing the seal of the National Sanitation Foundation (NSF), with a Standard Dimension Ra tio (SDR) not exceeding 14 and an Outside Diameter (OD) equal to the OD of the equivalent size ductile iron pipe. Provide the following minimum thickness class for cast or ductile iron pipe: 4 in to 8 in [100 mm to 200 mm] diameter – Class 51; and 10 in [2 50 mm] and larger diameter – Class 50. Wrap cast and ductile iron pipe with a loose -fitting, slip -on polyethylene film that covers the entire pipe and fittings.
B.Joints Provide packing and jointing materials for pipe joints and fittings in accordance wit h the AWWA and the public utility.
C.Fittings Provide copper fittings for copper waterlines and cast or ductile fittings for other waterlines. Provide bronze service clamps for standard water service connections. Provide couplings with factory -installed brass bushings in accordance with ASTM B 62 and AWWA C 800 for Standard Corporation stop threads.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 580–583 of 935.