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MEMORANDUf. <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION <br /> 3443 Routier Road Phone: (916) 361-5600 <br /> Sacramento, CA 95827-3098 ATSS Phone: 8-495-5600 <br /> TO: Antonia Vorster FROM: Patricia Leary <br /> Senior Engineer Associate Engineer <br /> DATE: 24 May 1990 SIGNATURE: � �{ oLplL2cl <br /> SUBJECT: MONITORING PROGRAM STATUS REPORT AND WORK PLAN FOR SOURCE CONTROL, OPERATIONAL <br /> REVISIONS AND ONGOING MONITORING, SMS BRINERS, SAN JOAQUIN COUNTY <br /> Luhdorff and Scalmanini (L&S) , consultants for SMS Briners, submitted the subject <br /> report, dated February 1990, in response to our letters dated 8 December 1989 and 6 <br /> February 1990 which required the submittal of a Technical Report. The Report was <br /> required by us to include plans and time schedules for operational and site <br /> modifications to achieve source control , and a ground water assessment plan to <br /> determine the extent of pollution from the facility. <br /> The first part of the report summarizes and analyzes the existing ground and surface <br /> water data which was collected at the site to date. Four monitoring wells and 8 <br /> production wells at varying depths have been included in the interim ground water <br /> monitoring network. Surface water monitoring sample results also were evaluated. The <br /> report concludes that saline water from the evaporation ponds has degraded the first <br /> aquifer, and pumping induced vertical migration has impacted the lower portion of the <br /> first aquifer. Also, the report stated that total dissolved solids and chlorides <br /> increased in surface water due to site runoff. <br /> The second part of the report is a work plan for operational and site modifications to <br /> control the source of pollution emanating from the operation. Sources include: <br /> 1. Percolation to ground water from two brine disposal ponds and unpaved surfaces in <br /> areas historically used for brining, <br /> 2. Storm water runoff to the North Fork Littlejohn' s Creek from brining areas at the <br /> facility. <br /> SMS proposes to conduct the following work for source control : <br /> 1 . Segregate brine waste and rinse water from storm water runoff, by constructing <br /> above ground containers (by September 1990); <br /> 2. Divert storm water runoff to the ponds (by September 1990) ; <br /> 3. Pursue the Underground Injection Control permit process and then construct an <br /> injection well (by December 1991) ; <br /> 4. Close the south pond and rehabilitate the north pond (by September 1992) . <br /> 5. Continue with an interim monitoring program through 1992. Modifications and a ramp <br /> test are proposed for one production well , but no additional wells or ground w :er <br /> assessment activities are proposed. <br />