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3.4 PUBLIC SERVICES AND UTILITIES EXISTING SETTING Water Supply. Water is supplied to the project area primarily through private wells. However, the County Development Policies would require public water systems. The San Joaquin Local Health District has identified and expressed concern over groundwater quality problems associated with high levels of trichloroethylene (TCE) found near the Tracy Defense Depot located less than one quarter mile -away from the project site (Kaufman, 1987). All private wells are individually maintained by the owner. San Joaquin County Ordinance Number 1862 (dated February 20, 1973), sets forth requirements for the construction, reconstruction and destruction of water wells, cathodic protection wells and installation of pumps in the unincorporated areas of San Joaquin County. All public well water must conform to the United States Public Health Service Standards and the State, Title 22, Standards for Drinking Water (Kaufman, 1987). Wastewater Disposal. The project area is currently served by septic tanks. San Joaquin County Ordinance number 549 requires that a property owner must apply to the Local Health District for a Sanitation Permit in order to install individual septic systems. All installations are subject to approval and inspection by the Local Health District. Ordinance 549 provides guidelines for location, installation and maintenance of sewage disposal systems. The nearest existing wastewater trunk lines associated with the City of Tracy are located at Valpico Road and Jefferson Road (15 and 18 inch lines) and also north of Schulte Road at MacArthur Road (a 24 inch trunk line) (City of Tracy, 1986). The City of Tracy's existing wastewater collection system consists of both gravity and pumped flow systems. The sewer plant is located in the northeast quadrant of Tracy, at Holly Drive and Arbor Avenue. The existing capacity of the plant is 6.0 mgd, and is expected to be expanded to 9.0 mgd capacity. This expansion is being financed by the 84-1 Assessment District and will be completed prior to development of Specific Plan areas identified in the Residential Areas Specific Plan prepared in January, 1987 (City of Tracy, 1987). Storm Drainage. At present, there is no integrated drainage system, and storm drainage in the project area is provided on a piece -meal basis by individual property owners or special districts. An irrigation canal owned by the Banta- Carbona Irrigation District is located on the project site but is not intended to be used for storm water runoff (Terrill, 1986). The County Development Policies would require that a public drainage system must serve rural residential developments, except in an area of infill development where soil characteristics may support on-site drainage. The County Planning Department considers it infill only if a parcel is completely surrounded by rural residential development. The project area has had some localized flooding but this has not been significant (Gau, 1987). Groundwater tests in the past have had very little variation and seem to lie generally about 40 feet in depth (Iwamiya, 1987). Police Services. The San Joaquin Sheriff's Department provides police service for the unincorporated areas of San Joaquin County. The Sheriff's Department 3.4-1