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capacity for domestic and fire usage (Kaufman, 1987). The additional 205 homes into the study area would require approximately 71,750 gallons per day at a usage rate of 350 gallons per home per day. The health district would require that the same standards required above for 14 homes be applied for 205 homes. In January, 1987, the San Joaquin County Board of Supervisors adopted County Development Policies which require that in all cases facilities must be determined to be adequate for the development and be compatible with site characteristics. These policies recommend that a public water system serve an entire rural residential area with parcels less than two acres, which is not the case of the Traina Brothers development. In comparing agricultural water use (specifically for orchards) to rural residential water use for the area, agricultural water usage is higher on an annual basis. For this area, estimated annual water use is four acre-feet per acre of orchard (one acre-foot is equal to 325,900 gallons) (Whitridge, 1987). Using this figure, the 26 acre project site would use 104 acre-feet of water per year for orchard uses and the 384 remaining acres in the study area would use 1536 acre-feet of water per year, for a total of 1,640 acre-feet per year for the entire study area. By comparison (using daily water consumption figures discussed previously), the 14 lot subdivision proposed for the project A area would use approximately 5.5 acre feet of water per year and the 384 acres would use approximately 80.4 acre-feet per year, for a total of 85.4 acre-feet per year. It should be noted that water consumption for agricultural uses varies seasonally with the heaviest water usage during the irrigation season A of April through September. Furthermore, annual agricultural water consumption for the study area is probably somewhat less since the area is not exclusively agricultural. e Wastewater Disposal. An estimated 4,410 gallons per day (gpd) of sewage generation from the proposed 14 homes is based on 90 percent of projected water use (Earth Metrics Incorporated, 1987). Estimated wastewater generation a for 205 potential homes in the study area would reach approximately 64,575 gallons per day. Y Since the project area currently is not served by wastewater collection lines and the Tracy Wastewater Treatment Plant, wastewater from project related development must be disposed of through the use of individual septic systems. Y Location and construction of septic systems must be in accordance with San Joaquin County Ordinance 549 which sets forth guidelines and requires permits from the Local Health District. A percolation test, soil profile and a minimum sewage disposal area are required on all lots. A permit from the Health District is needed prior to performing percolation tests. Furthermore, septic systems are not maintained by the County but must be maintained by the individual property owner (Kaufman, 1987). Storm Drainage. The increase in impervious surfaces as a result of 14 homes and additional 205 homes will increase storm water runoff in the project vicinity. The applicant for the 14 home rural residential subdivision is A proposing to drain the property to one central pond at the southeast corner of the property. The County Public Works Department requires preparation of a soils report to support this type of drainage plan. The Banta-Carbona Irrigation District will not accept any storm water runoff into their canal. 1 3.4-4