1500 INDUSTRY ST 2018-01-01 MF Import

8.6 PUBLIC �VATER SUPPLIES 8.G1 Threshold The analysis in the IVate�S;:s(em Plaii projectcd the overall futurr,peak-hour demar;d for the area at 2.7 gpm/acre (approximately 4,000 gpa/day peak flo�v), and assumed fire Ilow requirements of approximatcly 3,500 gpm for commercial and industrial/nianufacturing uses. Based upon the proposed design of the water system, any devclopment using more than 2.7 gpmJacre has the potential to affect�vater pressare on other sites. Additional analysis will be requireJ for development proposals with a peak hour demand aUove 2.7 gpmJacre and/or a fire (low requirement of 3,500 ��m or grcater. The additional analysis may be as simple as calculations completed by the Public Works Depa;tment prior to a pre-application mceting on a specific development proposal. The additional analysis must Jetermine how the proposal's water demand will affect the enlire water supply and distribution system. F'rojects with no additional major improvements needed and no adverse cumulativc impacts on thc water supply and distribution system arc covered by Ihis analysis. An analysis was conducted on the proposed water system. [t was detcnnined diat a fire (low of 5,000 gallons per minute could be achieved by the existin3 and proposed system. The 2.7 gpm/acre is an overatl average peak hour demand assumed for plamiing in large arcas such as the stady area. However, q�ere will undoubtedly be site-speci6c proposals�vith larger demand. Por example, large irrigation systems can exceed 50-gpn�/acre demand. Other land uscs wiU�demands much lower than 2.7 gpm/acre, such as warehouses, are assumed to occur to offset the higher demand land uses, resulting in an overall area wide average of 2.7 gpm/acre. 8.6.3 Mitigation Mcasures I. Looped water mains may be reqtiired for somc sites to mect fire Flow requirements and to protect water quality. Pressurc reducing valves may bz required when looped systems are constructed. (SEPA Public Services and Utilities Policies) 2. Developments must construct improvements necessary to provide a wate.r pressure of 40-80 psi under normal operating conditions as required by Public Works. (SEPA Yublic Sc.rvices and LJtilities Policies) 3. Recycling of runoff water Gom bus or truck washing facilities is rcquired. (S�PA Public Services and Utilities Policies) -1. New watcr system facilities must avoiu environmentally sensitive areas to die maximum extent possible. Where water lines must be constructed through environmentally sensitive areas,besi management practices must Ue followed. (Sec the mitigation measures discussed in Section 4) (SEPA Earih, Watcr, nnd Plant and Animal Policies) i 3�z3