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California Ronal Water Quality Wntrol Board <br /> Central Valley Region /''-° <br /> Steven T.Butler,Chair <br /> Sacramento Main Office <br /> Winston H.Hickox Internet Address: http://www.swrcb.ca.gov/—rwgcb5 Gray Davis <br /> Secretaryfor 3443 Routier Road,Suite A,Sacramento,California 95827-3003 Governor <br /> Environmental Phone(916)255-3000•FAX(916)255-3015 <br /> Protection <br /> 14 December 1999 <br /> Ms. Nancee Volpi <br /> c/o Herum, Crabtree, Brown, Dyer , Zolezzi, and Terpstra, LLP. <br /> 2291 West March Lane, Suite B 100 <br /> Stockton, CA 95207 <br /> REQUEST FOR ADDITIONAL ANALYSES FOR CURRENT SITE INVESTIGATION AT <br /> VOLPI FARMS, 14210 WEST STATE ROUTE 4, STOCKTON, SAN JOAQUIN COUNTY <br /> On 2 December 1999, I observed current soil excavation, sampling and stockpiling activities at Volpi <br /> Farms in Stockton. These observations, combined with additional information about site history, raised <br /> concerns about potential additional constituents of concern that may pose a threat to water quality. The <br /> investigative and remedial work now in progress is being done according to a work plan that I approved, <br /> with amendments, in my 18 August 1999 letter to you and your consultant. According to that letter, the <br /> list of laboratory analyses for constituents of concern for this project includes: total petroleum <br /> hydrocarbons as diesel,total petroleum hydrocarbons as motor oil; total petroleum hydrocarbons as <br /> gasoline; fuel oxygenates (MtBE and others) and benzene,toluene, ethylbenzene and xylenes . <br /> As discussed with your consultant on 2 December at the site and by telephone on 10 December 1999, I <br /> request that analyses for pesticides and solvents be added for soil and water samples. During the 10 <br /> December conversation, I asked your consultant to add USEPA Methods 8080 and 8010 analyses to <br /> those already requested for characterization of the soil stockpile at the site. I followed this conversation <br /> with a facsimile request(copy attached), and this letter serves as confirmation of that request. As noted <br /> in the facsimile,your consultant and I considered using USEPA Method 8270, but decided on the less <br /> expensive Method 8010 for the stockpiled soils. When the results of the soil stockpile analyses are <br /> available, we will evaluate the need to change to Method 8270 or another method for the water samples, <br /> or the possibility of eliminating some of the analyses for future samples. <br /> Work remaining to be done during the current phase of investigation includes installing monitoring <br /> wells, as described in the approved work plan and staff s letter of 18 August 1999. Please inform me at <br /> least two working days in advance when this work is scheduled. <br /> California Environmental Protection Agency <br /> �a Recycled Paper <br />