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CALIFORNIA REGIO WATER QUALITY CONTROL BOARD CablEPA <br /> CENTRAL VALLEY REGION <br /> 0 <br /> Sacramento, <br /> Roumento, Road, Suite 0 <br /> Sacramento, CA 95827-3098 <br /> Phone(916)255-3000 <br /> FAX(916)255-3015 - :� r.., Pete Wilson,Governor <br /> 18 November 1997 <br /> Mr. Robert Thompson <br /> LeBouf, Lamb, Greene & McRae <br /> One Embarcadero Center <br /> San Francisco, CA 94111 <br /> REVIEWAND COMMENTS REGARDING RECENT SUBMITTALS,LPVCOLN CENTER, <br /> STOCKTON, SAN JOA Q UIN CO UNTY <br /> We are in receipt of a number of documents which have recently been submitted in support of the soil <br /> and groundwater investigation at Lincoln Center, Stockton. The investigation is being conducted on <br /> behalf of the"Settling Dry Cleaning Defendants" (SDCDs) under a federal Consent Decree. In addition, <br /> staff recently attended a project update meeting and participated in a conference call to discuss the <br /> remedial investigation schedule. This letter contains comments regarding staff s review of the recent <br /> developments at Lincoln Center. A general comment is that the documents are well written and well <br /> organized. <br /> Public and Private Well Survey Report (21 July 1997) <br /> 1. The report states that no volatile organics compounds (VOCs) were found in the closest <br /> downgradient municipal well, COS-11. This is not true. The lab sheet shows that chloromethane <br /> was found at 0.76 4g/1. <br /> 2. Either the monitoring wells at the Chevron Station are to be included in the quarterly monitoring <br /> events or additional wells shall be installed in this area. <br /> 3. The Exxon monitoring wells which contain 40-foot screens are not to be used in determining site- <br /> wide water level elevations. <br /> 4. I concur with the conclusions and recommendations. When will this additional work be completed? <br /> Second Quarter 1997 Monitoring Report(29 August 1997) <br /> 1. The quarterly reports are to include isoconcentration maps for PCE and total "Hazardous <br /> Substances" (the five VOCs identified in the Consent Decree). Separate maps are to be prepared for <br /> each individual water bearing zone. <br /> 2. The analytical results of all detected VOCs,not just the five "Hazardous Substances," are to be <br /> presented in the data tables. The fourth quarter 1997 monitoring report (due by 15 February 1998) <br /> is to contain an updated data summary table containing all detected VOCs. <br /> Recycled Paper Our mission is to preserve and enhance the quality of California's water resources,and <br /> ensure their proper allocation and efficient use for the benefit ofpresent and future generations. <br />