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i <br /> Bank of Stockton Ij f Page 2 <br /> r <br /> I� <br /> PHS/EHD concurs that a second round of groundwater ri onitol ring will provide confirming <br /> data, prior to the installation of additional monitoring wells, ,which may be necessary to <br /> further assess the lateral extent of groundwater contamination. ;The next quarterly sampling <br /> should be scheduled September 9, 1992 with the resultant quarterly report due <br /> September 23, 1992. Please be advised that pursuant to Sd�ction 2652(d) of the Underground <br /> Tank Regulations, a quarterly monitoring report shall be submitted to PHS/EHD and the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB) until the investigation , <br /> and cleanup of the site is deemed adequate. I} <br /> PHS/EHD requested in correspondence, dated January,,23, 1;992, that total lead analysis <br /> occur in lieu of organic lead analysis which was proposedlin the work plan. Soil samples of <br /> the excavation taken February 3, 1992 underwent analysis for organic lead. Soil samples of <br /> the borings converted to monitoring wells taken May 15, 1992 did not undergo lead analysis i <br /> as requested. Soil contamination was encountered during thei�dnlling of monitoring wells, <br /> MW-2 and MW-3, indicating residual soil contamination is present. Any future confirmation <br /> sample analysis should include total lead. <br /> i <br /> I <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 /> I � <br /> i <br /> Jogi Khanna, M.D., M.P.H. <br /> HealthOffice Ir p <br /> f <br /> A. Cotulla, REHS, Program Manager <br /> mental Health DivisionM:Ib <br /> 19 <br /> c: Elizabeth Thayer, CVRWQCB <br /> c: John Urrutia, Bank of Stockton <br /> c: Victor Cherven, Geological Audit I <br /> c: Jim Hoblizell, Falcon Energy ' <br /> ;I <br /> G <br /> h <br /> '9 <br /> l( II <br /> I� <br />