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I DIVISION 7—DRAINAGE STRUCTURES, STORM SEWERS, SANITARY SEWERS, I AND CONDUITS 7-04 STORM SEWERS I 7-04.1 Description Revise the first paragraph in 7-04.1 to read as follows: This Work consists of constructing storm sewers to lines and grades as shown on the Plans and in accordance with COE Standard Drawings, the Standard Specifications and these Special Provisions. Supplement 7-04.1 as follows: 7-04.1(1) Submittals (******) Provide Type 2 Working Drawings for all materials and Standard Plans. 7-04.2 Materials Delete the first and second paragraphs in 7-04.2 and substitute the following: Use the following pipe materials for storm sewers: Rigid DI (ductile Iron) all diameter sizes Thermoplastic PVC(Polyvinylchloride) all diameter sizes PE(Polyethylene) all diameter sizes PP(Polypropylene),dual wall 12 to 27 inches diameter PP(Polypropylene),triple wall 30 inches and larger diameter Materials shall meet the requirements of the following sections: Ductile Iron Pipe 9-05.13 Standard Specifications I Solid Wall PVC Storm Sewer Pipe 9-05.12(1) Special Provisions and Joints Profile Wall PVC Storm Sewer Pipe 9-05.12(2) Standard Specifications and Joints Corrugated Polyethylene Storm 9-05.20 Standard Specifications Sewer Pipe and Joints I Corrugated Polypropylene Storm 9-05.24 Special Provisions Sewer Pipe Revise the last paragraph in 7-04.2 to read as follows: Unless specific pipe material is listed in the Plans, provide the specified schedule and diameter of either DI, PVC, or PE/PP materials listed above. Contact the Olympia Service Center Materials Laboratory to determine if joints have been approved for pipe diameters larger than those listed. On the web at: http://www.wsdot.wa.gov/biz/mats/QPL/QPl.cfm Or by mail at: PO Box 167 Olympia,WA 98507-0167 (360) 709-5442 I HAYES STREET REGULATOR February,2017 AND CSO CONTROLS (SRO1, SRO2, AND SRO3) WO No—UP3398-31 SP - 161