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STATE OF CALIFORNIA—RESOURCES AGENCY RONALD REAGAN, Governor CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD- CENTRAL VALLEY REGION 3251 S STREET SACRAMENTO, CALIFORNIA 95816 PHONE: (916) 445-0270 20 November 1972 San Joaquin County Planning Department 1850 East Hazelton Avenue Stockton, California 95205 Gentlemen: We have received the Environmental Impact Report and subdivision map from you for Corral Hollow Subdivision Tract No. 903 . The developer has not submitted information regarding suitability of the site to dispose of domestic wastewater by individual sep- tic tanks. Specifically, the developer has not provided infor- mation on the depth to ground water, historical high ground water level , underlying soil characteristics, leach field design in- formation, capacity of the soil to handle domestic wastewater , subsurface geologic conditions, and possible adverse effects of the discharge on ground water quality. Design and construction of septic tank - leaching systems will 0� need to conform with San Joaquin Local Health District standards. We will require, in addition, the formation of a public entity o to assume responsibility shoai ure of indivi ua wastewater treatment systems occur. Such entity would be endowed with the necessary powers to accumulate planning, construction, mainte- nance, and operation funds; to supervise planning and installa- tion of facilities if necessary; to levy and collect service charges; and other such powers as may be required. A public entity may not be necessary if an agreement is reached to con- nect the subdivision to an existing community sewerage system. In addition, the developer must conform with pending San Joaquin County water well standards, which specify stringent conditions for the construction and maintenance of domestic wells. For example, special attention must be given during well construction to prevent degradation of producing aquifers below the Corcoran Clay stratum by the poorer quality shallow aquifer. We cannot comment favorably on this proposed subdivision until the developer has filed a report of waste discharge with this office, together with sufficient supplementary information to assure us that it will not be the cause of pollution or nuisance.