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John Margowski <br /> Page 3 <br /> Area C <br /> Confirmation soil sampling in July 1992 indicated that Area C was remediated Soil sample results <br /> from soil boring, S134, dad not detect contamination at 30 or 40 feet Slight contamination was <br /> detected at 35 feet,6 ppm TPH-gasoline and 60 ppb xylene The soil sample results from the sample <br /> collected at 43 feet after overdrilling and destroying vapor extraction well, P1, did not detect <br /> contamination <br /> Monitoring and Vapor Well Destruction <br /> As indicated above, PHS/EHD does not recommend the destruction of any of the seven monitoring wells at <br /> this time <br /> There are currently ten vapor extraction wells on site P3,P3A, P3B,P3C,P3D, VSB5, EX, VSB3,VSB9, and <br /> VSB11 Currently, active extraction occurs only from VSB3, VSB5, VS139 and VSB11 PHS/EHD <br /> recommends that wells currently in use not be destroyed at this time PHS/EHD does not have sufficient <br /> information to recommend the destruction of wells not currently in use <br /> Should you .wish to perform confirmation soil sampling at this time, please submit a permit application and <br /> S8900 Field work may be scheduled upon issuance of the drilling permit Please continue to notify <br /> PHS/EHD 45 hours prior to sampling events If you have any questions or comments please contact Mary <br /> Meays, Senior REHS, of my staff at (209) 468-0337 <br /> Jogi Khanna, M D, M P H <br /> Health Officer <br /> _ � r <br /> r <br /> � C <br /> Laurie A. Cotulla, REHS, Program Manager <br /> 1✓nvironmental Health Division <br /> LAC/MM lb <br /> C Elizabeth Thayer, CVRWQCB <br /> c Raymond Wheeler Jr <br /> Christopher Eley, Wheeler Executor <br /> c George Converse, WEGE <br />