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Administrative Draft Environmental Impact Report Gill Medical Center Project 4.21.1.2 Wastewater Sanitary sewer service within San Joaquin County is provided by several special districts that serve individual communities and include community service districts, public utility districts, sanitary districts, and sewer maintenance districts. Some special districts are connected to cities but operate independently, while other districts were created to serve planned developments that were never built. Some agencies provide sewer collection services only, and contract with major sewer districts who have sewer treatment facilities for wastewater treatment and disposal. The cities of Escalon, Ripon, and Tracy primarily provide service to residents in incorporated areas and rely on private septic systems to serve unincorporated areas. Several of the unincorporated communities lack sanitary sewer infrastructure and use individual or community septic systems. These communities include: Acampo, Banta, Chrisman, Collierville, Coopers Corner, the Delta Planning Area, Farmington, French Camp, Glenwood, Lammersville, Morada, New Jerusalem, Noble Acres, Peters, Stoneridge, Thornton, Vernalis, and Victor. The community of Banta has experienced problems with high groundwater levels, and some lots are too small to be serviced by a septic system. Coopers Corner and Morada are both served solely by individual septic systems. Several residences in the Delta Planning Area have individual systems while some communities have their own wastewater disposal systems.There are five locations within San Joaquin County that are able to discharge effluent into the Delta waters, which include: Lodi, Tracy, Manteca/Lathrop, Mountain House, and Stockton. Project Site The Project site is not currently located within or served by a wastewater collection or sanitary sewer treatment district and there are no existing onsite wastewater generating uses. Similar to water, the nearest public wastewater utility is that of the City of Stockton. Because the Project site is located outside the City wastewater service area, it is not eligible for City wastewater service. 4.21.1.1 Stormwater Stormwater in San Joaquin County is managed consistent with the San Joaquin County Stormwater Management Plan (SWMP). The SWMP was developed to fulfill requirements for stormwater discharges from the Small Municipal Separate Storm Sewer System (MS4) operators in accordance with Section 402(p) of the Federal Clean Water Act (CWA). The SWMP was also developed to comply with General Permit Number CAS000004, Water Quality Order No. 2003-0005-DWQ.The SWMP continues most of the previous program objectives and proposes a range of continuing and enhanced Best Management Practices (BMPs) and control measures.The implementation of the stormwater management program requires a coordinated management effort by the City of Stockton (City) and the County.While named as co-permittees to one permit, the City and County currently have separate programs and submit documents and reports separately to the CVRWQCB. However, the programs are essentially identical and the co-permittees collaborate with each other to address common issues and to ensure consistency in program development and implementation. Although the co-permittees coordinate with each other, each agency is responsible for implementing actions within their respective jurisdictions as related to their Utilities and Service Systems 4.21-3 October 2021