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tion, as reduced by the percentage established in Stage 11 through Stage VI herein. For example, the average summer water use during 1990 for single - family resi- dential customers was 703 GPD; in Stage 11, the average (703 GPD) would be reduced by 25 percent to yield a "floor" of 525 GPD. G. "Excess Use" means the difference between a customer's actual consumption of water for the billing period and the customer's allocation. H. "G1'D" means gallons per day. 1. `Summer" means the months of May through September, inclusive. (Ord. 2000 § 1, 2009; Ord. 1508 § 1, 1991) 9.30.050 Creation of classes. The following classes of customers or uses are hereby created: A. "Single- family residential" consists of water service to land improved with structures designed to serve as a residence for a single- family. B. "Multiple- family residential — apartments" consists of water service to land improved with struc- tures designed to serve as apartments. C. "Multiple- family residential — townhouses/ condominiums" consists of water service to land im- proved with structures designed to serve as townhouses or condominiums. D. "Nonresidential" consists of water service to land improved with structures designed to serve wafer for other than residential uses. Commercial (including restaurants), recreational, charitable, educational and cultural uses are included in this class. E. "irrigation" consists of water service which is separately metered and is used exclusively to water turf and other landscaping areas. (Ord. 1508 § 1, 1991) 9.30.060 Reduction in water use. A. The following stages of 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 upon the following infor- mation concerning city customers: 1. Summer use for single- family residential customers is approximately 5,650 cubic feet bimonthly or 703 GPD. 2. Summer use for multiple - family residen- tial—apartment customers is approximately 1,300 cubic feet bimonthly or 162 GPD per apartment unit. 3. Summer use for multiple - family residen- tial— townhouse/condominium customers is 18.7 hun- 269 dred cubic feet bimonthly or 233 GPD per townhouse/ condominium unit. B. Based upon these uses and the proposed reductions in deliveries from Zone 7, the director is em- powered to impose and enforce reductions in each of the following stages of this section when it is determined, through engineering analysis, that the available daily water demand exceeds, or is expected to exceed, the daily water supply from all of the city's sources. C. The following table gives a summary of the stages of reductions in water use which may be imposed to meet customer water demands. Stage I -A 1 -R I -C I -D II Iv v VI VII REDUCTIONS IN WATER USE Overall Reduction l0% 15% 20% 25% 25% 35% 40% 50% 60% Emergency Shutoff (Ord. 1560 § 1, 1992; Ord. 1508 § 1, 1991) 9.30.050 Voluntary or Mandatory Voluntary Voluntary Voluntary Voluntary Mandatory Mandatory Mandatory Mandatory Mandatory 9.30.070 Voluntary reduction in water use. A. Stage I -A; 10 percent voluntary reduction in water use. The director may declare a Stage I -A reduc- tion in water use and thereby impose a voluntary reduc- tion in water use as follows: 1. Every customer shall use no more water than the customer used during the comparable billing period in 1990, and every customer shall eliminate wast- ing potable water in an effort to aid the city in achieving a 10 percent reduction in the amount of water used by all customers during comparable billing periods in 1990. New customers shall not use in excess of 90 percent of the city's estimated consumption for similar customers. 2. To achieve this reduction, each residential customer shall reduce its summer water use by 10 per- cent, each nonresidential customer shall reduce its sum- mer bimonthly use by 10 percent and each irrigation customer shall reduce its summer use by 20 percent. B. Stage 1 -B; 15 percent voluntary reduction in water use. The director may declare a Stage I -B reduc- tion in water use and thereby impose a voluntary reduc- tion in water use as follows: (Pleasanlon Supp. No. 3, 1 -10)