6600 MERRILL CREEK PKY BLDG A SHELL 2016-01-01 MF Import

. II 8.6 PUI3LIC WATER SUPPLIES I, 5.6.1 Threshold � , The analysis in the Water Svsrem Plan projected the overall future peak-hour dema�id for the area at 2.7 I gpm/acre (approximately 4,000 gpa/day peak flow), and assumed fire flow requirements of ; approximately 3,500 gpm for commercial and industrial/manufacturing uses. Based upon the proposed � design of the water system, any development using more than 2.7 g,pm/acre has the potential to affect �vater pressure on other sites. Additional analysis will be required ior development proposals with a � peak hour dcmand above 2.7 gpm/acrc and/or a fire tlow requirement of 3,500 gpm or greater. The i additional analysis may be as simple as calculations completed by the Public Works DepaRment prior to a pre-application meeting on a specific dcvelopment proposal. The additional analysis must , determine how the proposaPs water demand will afCect the entire water supply and distribution system. Projects with no additional major improvements nceded and no adverse cumalative impacts on the water suppty and distribution system are covered by this analysis. The 2.7 gpm/acre is an overall average peak hour demand assumed for planning in large azeas such as the study area. Ho�vever, there will undoubtedly be site-specific proposals with larger demand. For example, lazge irrigation systems can exceed 50 gpm/acre demand. Other land uses with demands much lower than 2.7 gpm/acre, such as warehouses, are assumed to occur to offset the higher demand i land uscs, resultir.g in an overall area wide average of 2.7 gpn�/acre. � The impacts of construction oCthe new water line to service development west of Japanese Gulch �•�ere not covered in the EIS. Additional SEPA analysis is required ro revieri altemative routes for the line �vhich will minimize the impacts of the p�oposal. � 8.G.3 Mitigation Mcasures � l. Looped water mains may be required for some sites to meet fire ilow requirements and to protect warer quality. Pressure reducing valves may be required when looped systems are constructed. (SEPA Public Services and Utilities Policies) i 2. Developments must construct improvements necessary to provide a water pressure of 40-80 psi under normal operating conditions as required by Public Works. (SEPA Public Services and Utilities Policies) 3. Recycling of runoff water from bus or truck�vashing (acilitics is required. (SEPA F'ublic Services and Utilities Policies) 4. Ne�v water system facilitics must avoid environmentally sensitive areas to the maximum extent possible. Where water lines must be constructed through environmentally sensitive areas,best management practices must be followed. (Sec tlie mitigation measures discussed in Section 4) (SGPA Earth, Watcr, and Plant and Animal Policies) 17 i �