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5 Up to 50% Mandatory 6 More than 50% Mandatory (Ord. 2148 § 1,2016; Ord. 2118 § 1, 2015;Ord.2104 § 1,2014; Ord.2092 § 1,2014) 9.30.070 Calculation of customer reduction in water use. California Water Code Section 10632(a)(6)requires a water supplier to penalize or charge for excessive water use,where applicable. To comply with this state mandate,water use shall be calculated as described in this section. A. When a water shortage is declared with mandatory reductions in water use,the director may impose the applicable stage of mandatory reduction by calculating customers' average usage for the same billing period from one to four prior years,as data is available. If sufficient historic usage information is not available,the director may base water use allocations on a combination of the limited historic usage data available, per-capita water use targets,water usage from similar customer types, and other activity- specific water usage data. B. Usage of water in excess of a customer's mandatory conservation amount is subject to excess use penalties in Section 9.30.100. 1. Medical patient—care facilities,because they are responsible for life and safety services, are only required to achieve a fifteen percent(15%)reduction when a Stage 2 mandatory reduction of twenty percent(20%) is required,or when any higher stage is declared or greater mandatory reduction required. (Ord. 2148 § 1,2016; Ord. 2118 § 1, 2015;Ord. 2104 § 1,2014; Ord.2092 § 1,2014) 9.30.080 Conservation measures. The following conservation measures are applicable for adequate supply,and the declared water shortage stage(s) indicated: A. Stage 1 —Up to 10%Voluntary Reduction. Adequate supply is currently available.To protect and preserve the community water supply the elimination of wasteful water uses is essential at all times, regardless of water supply stage. Pleasanton customers shall always observe the following regulations on water use: 1. Use potable water for irrigation of landscapes in a manner that does not result in runoff such that water flows onto adjacent property,non-irrigated areas,driveways,private and public walkways, roadways,parking lots, or structures. 2. Schedule regular irrigation of lawn and landscape between the hours of 9:00 p.m. and 6:00 a.m.the following day. Watering is permitted at any hour if a hand-held nozzle or drip irrigation is used. Special landscapes are exempted. 3. The use of potable water to wash down sidewalks,walkways, driveways, parking lots,open ground or other hard surface areas by the direct application of water is prohibited. 4. The use of potable water for washing vehicles and/or machinery from a hose equipped with a shut-off nozzle is permitted as long as water does not enter the storm drain system. 5. Repair potable water leaks from breaks within the customer's plumbing system within eight hours after customer is notified or discovers the break.