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The following stages of action for reduction in water use depend on the total amount of water supplied to the city by Zone 7 and the amount of water the city is able to pump out of the groundwater basin from its own wells. These stages are based on the Urban Water Management Plan. REDUCTIONS IN WATER USE Stage Overall Reduction Voluntary or Mandatory 1 Up to 20% Voluntary 2 Up to 20% Mandatory 3 Up to 35% Mandatory 4 35% or more Mandatory 9.30.070 Calculation of customer reduction in water use. A. When a water shortage is declared with mandatory reductions in water use, the director shall 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. 9.30.080 Conservation measures. The following conservation measures are applicable for adequate supply, and the declared water shortage stage(s) indicated: A. Level: Adequate Supply. To protect and preserve the community water supply the elimination of wasteful water uses is essential at all times, regardless of water supply level. 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 6:00 p.m. and 9:00 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. No wastewater from vehicle washing may enter the storm drain system. The use of water for motor vehicle or machinery washing, from a hose equipped with a shutoff nozzle shall not result in runoff or illicit discharge. 5. Repair potable water leaks from breaks within the customer's plumbing system within eight hours after customer is notified or discovers the break. 6. Reduce other interior or exterior uses of water to minimize or eliminate excessive runoff or waste. 7. Restaurants shall serve water to their customers only when specifically requested. 8. Operators of hotels and motels shall provide guests with the option of choosing not to have towels and linens laundered daily. The hotel or motel shall prominently display notice of this option in each guestroom using clear and easily understood language. 2