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Penny Silzer <br /> Page 2 <br /> INTERIM REMEDIAL ACTION <br /> PHS/EHD agrees that interim remedial action would be appropriate to reduce the <br /> contaminated soil which is a continuous source of contamination to groundwater. The <br /> preferred interim remedial action alternative included soil vapor extraction, air sparging, <br /> continued investigation of groundwater contamination, and continued groundwater <br /> monitoring. <br /> Please proceed with efforts to secure an Authority to Construct permit from the San <br /> Joaquin Valley Unified Air Pollution Control District. Please submit by June 30, 1993 a <br /> work plan to install the vapor extraction system and to continue the soil and groundwater <br /> contamination which has been requested. <br /> The report indicated that a release occurred from the underground piping associated <br /> with the above ground storage tanks which contain gasoline and diesel in 1976. Please <br /> forward copies of all further reports to the attention of Wendy Cohen, Above Ground <br /> Storage Tank Unit of the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB). Copies should continue to be forwarded to PHS/EHD and to Elizabeth <br /> Thayer, Underground Storage Tank Unit of the CVRWQCB. <br /> If you have any questions or to schedule a site inspection, please contact Mary Meays, <br /> REHS, of my staff at (209) 468-0337. <br /> Jogi Khanna, M.D., M.P.H. <br /> Health Offs <br /> � L <br /> La <br /> urie A. Cotulla, REHS, Program Manager <br /> /Environmental Health Division <br /> LAC/MM:lb <br /> c: Elizabeth Thayer, CVRWQCB <br /> c: Brian Frus, Pacific Environmental Group <br /> c: Diane Lundquist, GeoStrategies <br /> c: Wendy Cohen, CVRWQCB <br />