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�. Rambo Baking <br />Page 2 of 2 <br />n <br />u <br />consideration to the increasing groundwater level at the site and other specific changes <br />which may have occurred at the site over the past several years <br />Anderson Consulting Group conducted a well survey for this site in 1991 The <br />Department of Water Resources (DWR) was contacted and three wells were identified <br />south of the site withm a 2,000 foot radius of the property Municipal suppliers and <br />nearby industries should also be contacted and a physical search should be performed in <br />the area within a 2,000 foot radius of the site to identify any wells Submit any known <br />construction details of the located wells Submit a well survey addendum to PHS/EHD, <br />identify all sources of information and clearly depict each well location as it relates to the <br />above referenced site Discuss conclusions regarding public and environmental health <br />risks as they relate to the pumping influence of these identified wells and the migration <br />and potential impact of the contaminant plume <br />Submit a Work Plan to define the lateral extent of contamination at this site by May l <br />1999 Include the above mentioned components in the Work Plan <br />Sampling for Total Petroleum Hydrocarbons as gasoline (TPHg) has been omitted for <br />l <br />Ms 1, 5, 7, 8, 10, 11, 12, and 13 in some past QMRs Initiate and continue quarterly <br />ie groundwater monitoring of all MWs Analyze groundwater samples for Benzene, <br />Toluene, Ethylbenzene and Xylenes using EPA Method 8020 and TPH-g using EPA <br />' Method 8015 modified. Groundwater samples should also be analyzed for Ethyl Tertiary <br />Butyl Ether (ETBE), Tertiary Butyl Alcohol (TBA), Methyl Tertiary Butyl Ether <br />(MTBE), Di -isopropyl ether (DIPS) and Tertiary Amyl Methyl Ether (TAME) by EPA <br />Method 8260 (see attached letter) PHS/EHD also requests that a rose gradient diagram <br />for the site be submitted in the next QMR. <br />Contact Carol Oz, Senior RENS, if you have questions about this letter <br />Donna Heran, REHS, Director <br />Environmental Health Division <br />Carol Oz, Senior REHS Margaret Lagono, REHS <br />Site Mitigation unit IV Supervisor <br />cc Mark List-CVRWQCB <br />,✓ Mark Milward-Philip Services Corp <br />0 <br />