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Home My WebLink AboutWTR2702175.3SANITARY SEWER NOTES 1. All work materials shall be in conformance with the Standards and Specifications of the City of Renton Utility Department and the latest edition of the WSDO`i'/APWA Standards and Specifications. 2. The hours of work in the street right-of-way shall be limited to 8:30 am to 3:30 pm on weekdays unless otherwise approved in writing by the Department of Public Works at 235-2620. All street closures, partial_ or full, shall be approved by the Department of Public Works 24 Hours in advance. The police department, fire department, aiid 911 shall be notified 24 hours .in advance. 3. All construction shall be in accordance with "Standard Specifications for Municipal Public Works Construction" prepared by Washington State Chapter American Public Works Association, latest edition (APWA) and City of Renton Standard Specifications. 4. All locations of existing utilities sliown are approximate and it shall be the contractor's responsibility to verify the true and correct location so as to avoid damage or disturbance. 5. A preconstruction conference and a 24 hour notice shall be required prior to starting new construction. It shall be the contractor's responsibility to secure all necessary permits prior to starting construction. (Inspection will be accomplished by a representative of the City of Renton.) It shall be the contractor's responsibility to notify the Utility Department 24 hours in advance of backfill i_ng all construction. 6. Contractor is solely responsible for the means, methods and sequences of construction and for the safety of workers and others oil the construction site. 7. It sliall be the responsibility of the contractor_ to obtain street use and any other related permits prior to any construction. 8. Plans approved by the City of Renton, Public Works Department shall take precedence over all other plaits. 9. A copy of these approved plans must be oil the job site whenever construction is in progress. 10. The contractor shall provide the City of Renton with an as - built drawing of the sanitary sewer system which has been stamped and signed by a licensed Professional Engineer or licensed Professional Surveyor. 11. Backfill shall be placed equally on both sides of the pipe in layers with a loose average depth of 6 inches, maximum depth of 8 inches, thoroughly tamping each layer to 950 of maximum density. These compacted layers must extend for one pipe diameter oil each side of the pipe or to the side of the trench. Materials to complete -the fill over pipe shall be the same as described. 12. Open cut road crossings for utility trenches oil - existing traveled roadway shall be backfi_lled with crushed rock and mechanically compacted. Cuts into the existing asphalt shall be neatline cut with saw in a continuous line. A temporary mix patch must be place immediately after backfill and compaction. A permanent hot mix patch shall be placed within 30 days and shall be per City of Renton current standards. 13. Datum shall be City of Renton, U.S.C. and G.S. 14. All disturbed areas shall be seeded and mulched or otherwise stabilized to the satisfaction of the Department for the prevention of on --site erosion after -the completion of construction. 15. All pipe and appurtenances shall be laid on a properly prepared foundation in accordance with section 7-02 . 3 (1) of the current State of Washington Standard Specifications for Road and Bridge Construction. This shall include necessary leveling of the trench bottom or the top of the foundation material as well as placement and compaction of required bedding material to uniform grade so that the entire length of the pipe will be supported oil a uniformly dense unyielding base. Pipe bedding shall be pea gravel 6" above and below the pipe. W rR-27 -2/7 ' 16. Sanitary sewer pipe shall be polyvinyl chloride (PVC) rubber gasketed AS'1M D 3034, SDR 35, or ductile iron Class 50. 17. In unimproved areas, manhole to extend minimum 6 inch and maximum 18 inch above finished grade. In paved area, cover must, slope in all directions to match paving. WATER NOTES 1. All work materials shall be in conformance with the standards and specifications of the City of Renton Utility Department and the latest edition of the WSDOT/APWA Standards and Specifications, as approved by the City of Renton. A set of approved plans shall be kept on site at all times during construction. 2. The hours of work in the street right-of-way shall be limited to 8:30 am to 3:30 pm on weekdays unless otherwise approved in writing by the Department of Public Works at 235-2635. All street closures, partial or full, shall be approved by the department of public works 24 hours in advance. The police department, fire department, and 911 shall be notified 24 hours in advance. 3. All locations of existing utilities shown are approximate and it shall be the contractor's responsibility to verify the true and correct location so as to avoid damage or disturbance. For utility locate call 48-hour Locators, 1-800-424-5555. 4. All water main pipe to be cement lined ductile iron pipe conforming to AWWA C110 and C111 or latest revision, thickness class 52. Cement mortar lining and seal coating shall conform to AWWA C104 or latest revision. Pipe joints to be push -on or mechanical joint. Bedding to be class C. All ductile iron pipe installed south of Sunset Blvd. (Empire Way, SR 900) and west of SR 167 (East Valley Freeway) or in soils of high resistivity shall be polyethylene wrapped per ANST/AWWA C105- 77 standards. 5. Cast iron and ductile iron fittings shall be cement lined, pressure rated as noted on plans, and in accordance with ANSI/AWWA C110/A21.10-82. Cement lining shall be in accordance with ANSI/AWWA C104/A21.4-85. If fittings are 3 inches to 12 inches in diameter and have mechanical joints, the fittings shall be in accordance with either ANSI/AWWA C110/A21.10-82 Or ANSI/AWWA C153/A21.53-84. 3-Inch to 12-inch diameter fittings which have mechanical joints and/or flanged joints shall be in accordance with ANSI/AWWA C110/A21.10.82 And ANSI/AWWA C153/A21.53-84 Such that the portion of the fitting with a mechanical joint(s) may be in accordance with ANSI/AWWA C153/A21.53-84 And that portion of the fitting with flanged joint(s) shall be in accordance with ANSI/AWWA C110/A21.10-82 Shall be obtained by the contractor and transmitted to the owner. 6. Gate valves shall_ conform to AWWA C300 and shall be iron body, bronzed -mounted, double disc with bronze wedging device and o- ring stuffing box. Valves shall be designed for a minimum water operating pressure of 200 PSI. Gate valves shall be clove list 14, Mueller Company No. A2380, or M&H. All valves 12" in diameter and larger shall be installed in a vault. See water standard detail for 12" gate valve assembly vault and 1" bypass installation. 7. Fire hydrants shall be Corey type (opening with the pressure) conforming to AWWA C504-80 with a 6 inch inlet and a M.V.O. of 5 inches, two 2 1/2 inch hose nozzles with National Standard 7 inch, 60 degrees V, threads, O.D. Thread 4.875 and root diameter 4.6263, 1-1/4 inch pentagon operating nut opened by turning counter clockwise (left). 8. All water main 10 inches and smaller to maintain a minimum cover of 36 inches below finish grade. All water main 12 inches and larger shall be at a minimum of 48 inches below finish grade. Where utility conflicts occur, water mains are 9. All water mains six (6) inches in diameter and larger shall be cleaned with pipe cleaning "pigs" prior to disinfection. The "poly pigs" shall be Girard Industries Aqua Swab -AS or approved equal, 21b/cu ft density foam with 90A durometer urethane rubber coating on the rear of "pig" only. "Pigs" shall be cylinder shaped with bullet nose or square end. The contractor will perform the cleaning operation. 9a. All water mains and services shall be pressure tested to a minimum of 200 PSI or 150 PSI over operating pressure, in accordance with the specifications of the City of Renton and the Washington State Health Department. All pressure testing shall be done in the presence of a representative of the City of Renton. 9b. All water mains and services shall be disinfected. by the injection of a 50 PPM (minimum concentration) chlorine/water solution. Dry Calcium Hypochlorite shall not be placed in the pipe as laid. Chlorine shall be metered/injected in accordance with Section 7-11.3(12)E or 7-11.3(12)F of the Standard Specifications referenced in 1 above. 10. A preconstructi.on conference is required prior to any construction. A minimum of 3 (three) working days notice is required for scheduling. Prior to scheduling the pre -con a permit information sheet must be supplied to the Utility Engineer's office. Twenty-four hour notice will be required prior to starting new construction. 11. It shall be the contractor's responsibility to secure all necessary permits prior to starting construction. 12. Installation of corporate stops, water services, lines and meters shall not be done until all service agreements, meter applications, construction permits, and payment of fees have been made to the City of Renton. 13. All connection to existing mains to be accomplished by the City of Renton, except wet taps which may be made by approved wet tap contractors with prior approval from the Department of Public Works. All necessary excavation and materials to be supplied by the contractor and be on -site prior, to City notifications. 14. Inspection will be accomplished by a representative of the City of Renton. It shall be the contractor's responsibility to notify the Utility Department 24 hours in advance of backfilling all construction. The contractor as well as the engineers shall keep as -built drawings. 15. Contractor to provide -plugs and temporary blow -off assemblies for testing and purity acceptance prior to final tie-in. 16. All joint restraint systems (shackle rods, nuts, bolts, etc.) Shall be as manufactured by the Star Manufacturing Company of Columbus, Ohio or equal approved is writing by the Department of Public Works. 17. Asphalt and concrete street paving shall be sawcut to a minimum depth of two inches. Oil mat -streets may be spade cut. All surface concrete, pavement, sidewalks, curb, gutters, and driveway approaches shall be sawcut to a minimum depth of two inches or removed to an existing expansion joint. 18. A temporary cold mix asphalt patch shall be placed on the day of initial excavation with a permanent, sealed patch to be placed, to City of Renton policy, within ten days. Call foz subgrade inspection prior to placement of final patch. Trenches will not be left open over night without prior written approval of the Inspector. 19. For City projects Such as telemetry conduit, the PVC pipe used shall be schedule 40 in unimproved areas and schedule 80 under improved areas. All chemical pr?cess lines shall be schedule 80 PVC pipe. to be lower d to clea W�2175' PACIFIC ENGINEERING DESIGN INC. o X //- Pri4 �r SAL 4 r, r'.7 EXPIRES 5/6/ 1995 ®� 0 W ir 0 C' U i I I 0110 W Z U �W W Q� Q cis Z P .0 CO �30 W N tL w Q i Q�Qo nW U � 94--23 PROjEUT NO. DGS DRAWN BY 6-28--94 ISSUE DATE SHEET REVISION C 0 0 CIVIL ENGINEERING AND PLANNING CONSULTANTS