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Home My WebLink AboutS-348904• Sanitary Sewer Notes and Specifications 1. All work materials shall be in conformance with the standards and specification of the City of Renton Utility Department and the latest edition of the WSDOT /APWA Standards and Specifications. 2. 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. 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. 4. Contractor is solely responsible for the means, methods and sequences of construction and for the safety of workers and others on the construction site. 5. It shall be the responsibility of the contractor to obtain street use and any other related permits prior to any construction. 6. Plans approved by the City of Renton, Public Works Department shall take precedence over all other plans. 7. A copy of these approved plans must be on the job site whenever construction is in progress. 8. 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. 9. 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 95 percent of maximum density. These compacted layers must extend for one pipe diameter on 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. 10. Open cut road crossings for utility trenches on existing traveled roadway shall be backfilled 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 placed immediately after bockfill and compaction. A permanent hot mix patch shall be placed within 10 days and shall be per City of Renton current standards. 11. Datum shall be City of Renton, 1988 NAVD. 12. 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. 13. All pipe and appurtenances shall be laid on a properly prepared foundation in accordance with Section 7 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 on a uniformly dense, unyielding base. Pipe bedding shall be pea gravel 6 inches above and below the pipe. 14. Sanitary sewer pipe shall be polyvinyl chloride (PVC) rubber gasketed ASTM D 3034, SDR 35, or ductile iron class 50. 15. In unimproved areas, manhole to extend minimum 6 inches and maximum 12 inches above finished grade. In paved area, cover must slope in all directions to match paving. z 0 6" BUILDING SEWER PIPE w Z TEE WITH 6" SIDE OUTLET 6" SIDE SEWER AND BUILDING SEWER o a 60" ALLOWABLE MAX. FOR CAST IRON PIPE OR DUCTILE IRON PIPE. 1:3:5 MIX CONCRETE BLOCKING PROPERTY LINE FUTURE BUILDING SEWER \-2"x 4" STUD SERVICE MARKER PAINT UPPER PORTION WHITE ANS STENCIL ON SIDE WORDING "SEWER" WITH 3" HIGH BLACK, LETTERS. AND #6 WIRE WRAPPED AROUND THE STUD AND EXTENDED TO THE TOP OF THE STUD. UNLESS OTHERWISE APPROVED BY THE CITY, MAKE TAP THROUGH CAST IRON SADDLE SECURED TO SEWER MAIN WITH STAINLESS STEEL BANDS WHEN CONNECTING NEW SIDE SEWERS TO EXISTING MAIN. VITRIFIED CLAY, PLAIN AND REINFORCED CONCRETE, D1 PIPE AND C1 PIPE SEWER MAINS ARE TO BE CORE DRILLED LNG \_OG GGN 2q MIN SLOPE Surface Water Drainage Notes and Specifications 1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE - CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON PLAN REVIEWER. 2. All construction shall be in accordance with the 1996 Standard Specifications for Road, Bridge and Municipal Construction prepared by WSDOT and the American Public Works Association (APWA), as amended by the City of !Renton Public Works Department. 3. The surface water drainage system shall be constructed according to the approved plans, which are on file in the Public Works Department. Any deviation from the approved plans will require written approval from the City of Renton Public Works Department, Surface Water Utility Section. 4. A copy of these approved plans must be on the job site whenever construction is in progress. 5. Datum shall be NAVD 88 unless otherwise approved by the City of Renton Public Works Department. Reference benchmark and elevations are no on the plans. 6. All sedimentation /erosion facilities must be in operation prior to clearing and building construction, and they must be satisfactorily maintained until construction is completed and the potential for on -site erosion has passed. 7. All retention /detention facilities must be installed and in operation prior to or in conjunction with all construction activity unless otherwise approved by the Public Works Department, Surface Water Utility Section. 8. Gross seed may be applied by hydroseeding. The gross seed mixture, other than City of Renton approved standard mixes, shall be submitted by a Landscape Architect and approved by the Public Works Department, Surface Water Utility Section. 9. 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 Specification 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 on a uniformly dense, unyielding base. All pipe bedding shall be APWA Class "C ", with the exception of PVC pipe. All trench backfill shall be compacted to minimum 95% for pavement and structural fill and 90% otherwise per ASTM D- 1557 -70. Pea gravel bedding shall be 6 inches over and under PVC pipe. 10. Galvanized steel pipe and aluminized steel pipe for all drainage facilities shall have asphalt treatment #1 or better inside and outside. 11. Structures shall not be permitted within 10 feet of the spring line of any storm drainage pipe, or 15 feet from the top of any channel bank. 12. All catch basin grates shall be depressed 0.10 feet below pavement level. 13. Open cut road crossings through existing public right of way will not be allowed unless specifically approved by City of Renton Planning /Building /Public Works Administrator. 14. Rock for erosion protection of roadside ditches, where required, shall be of sound quarry rock placed to a depth of one (1) foot and must meet the following specifications: 4 - 8 inch rock / 40 70% passing; 2 - 4 inch rock / 30 - 40% passing; and less than 2 inch rock / 10 - 20% passing. 15. All building downspouts and footing drains shall be connected to the storm drainage system, unless approved by the City plan reviewer or Surface Water Utility Section. An accurately dimensioned, certified as -built drawing of this drainage system will be submitted to the City upon completion. 16. Issuance of the building or construction permits by the City of Renton does not relieve the owner of the continuing legal obligation and /or liability connected with storm surface water disposition. Further, the City of Renton does not accept any obligation for the proper functioning. and maintenance of the system provided during construction. 17. The Contractor shall be responsible for providing adequate safeguard, safety devices, protective equipment, floggers, and any other needed actions to protect the life, health, and safety of the public, and to protect property in connection with the performance of work covered by the contract. Any work within the traveled right of way that may interrupt normal traffic flow shall require a, traffic control plan approve by the Public Works Department, Transportation Systems Division. All sections of the WSDOT Standard Specifications 1 -07 -23 Traffic Control shall apply. 18. Special drainage measures will be required if the project location is within the aquifer protection area (APA). 19. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE - CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON, PUBLIC WORKS DESIGN ENGINEER. 20. All limits of clearing and areas of vegetation preservation as prescribed on the plan(s) shall be clearly flagged in the field and observed during construction. 21. All required sedimentation /erosion control facilities must be constructed and in operation prior to land clearing and /or construction to ensure that sediment laden water does not enter the natural drainage system. All erosion and sediment facilities shall be maintained in a satisfactory condition until such time that clearing and /or construction is complete and potential for on -site erosion has passed. The implementation, maintenance, replacement and additions to erosion /sedimentation control systems shall be the responsibility of the permitee. 22. The erosion and sedimentation control systems depicted on this drawing are intended to be minimum requirements to meet anticipated site conditions. As construction progresses and unexpected or seasonal conditions dictate, the permitee shall anticipate that more erosion and sedimentation control facilities will be necessary to ensure complete siltation control on the proposed site. During the course of construction, it shall be the obligation and responsibility of the permitee to address any new conditions that may be created by the activities and to provide additional facilities, over and above minimum requirements, as may be needed, to protect adjacent properties and water quality of the receiving drainage system. 23. Approval of this plan is for erosion /sedimentation control only. It does not constitute an approval of storm drainage design, size nor location of pipes, restrictors, channels, or retention facilities. 24. During the time period of October 1st through April 30th, all project distributed soil areas greater than 5,000 square feet, that are to be left un- worked for more than 12 hours, shall be covered by mulch, sodding or plastic covering. 25. In any area which has been stripped of vegetation and where no further work is anticipated for a period 30 days or more, all disturbed areas must be immediately stabilized with mulching, grass planting or other approved erosion control treatment applicable to the time of year. Grass seeding alone will be acceptable only during the months of April through September, inclusive. Seeding may proceed, however, whenever it is in the interest of the permitee, but must be augmented with mulching, netting or other treatment approved by the City of Renton, outside the specified time period. 26. For all erosion /sedimentation control ponds where the dead storage depth exceeds 6 inches, a fence is required with a minimum height of three (3) feet, 3:1 side slopes. 27. A temporary gravel construction entrance, 24 feet x 50 feet x 8 inches of 4 to 6 inch quarry spalls shall be located at all points of vehicular ingress and egress to the construction site. REVISION PER COR Rim �- ONE FULLH ' AT FULL '.'SCALE IF NOT ONE INCH SCALE ACCORDINGLY CITY OF RENTON Planning /Building /Public Works Dept. i • e m.,e 9/26/08 CM NOTES 4 L M9 SHEEr. OR 4 4 cp; J HORIZONTAL 6" SIDE OUTLET TEE SEWER MAIN SEWER MAIN 6" MIN. CONCRETE BLOCKING ANGLE OF TEE AT MAIN OVER 25 TYPICAL SIDE SEWER ELEVATION ELEVATION NOTE: UNLESS OTHERWISE SHOWN ON PLAN, SIDE SEWER SHALL HAVE A MINIMUM 2.5' COVER AT PROPERTY LINE OR 3 -5' LOWER THAN THE LOWEST HOUSE ELEVATION, WHICHEVER IS LOWER. SIDE SEWER- ri_"� NTS 74,) REVISION PER COR Rim �- ONE FULLH ' AT FULL '.'SCALE IF NOT ONE INCH SCALE ACCORDINGLY CITY OF RENTON Planning /Building /Public Works Dept. i • e m.,e 9/26/08 CM NOTES 4 L M9 SHEEr. OR 4 4 cp; J