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PUBLIC HEALTH SERVICES <br /> • SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M D , M PH , Health Officer <br /> 304 East Weber Avenue,Third Floor • Stocl.-ton, CA 95202 <br /> 209/468-3420 <br /> ED RALSTON <br /> TOSCO MARKETING COMPANY <br /> 2000 CROW CANYON PLACE, SUITE 400 <br /> SAN RAMON CA 94583 <br /> WORK PLAN Work Plan for Additional Site Assessment,Well Surrey,and Sete Conceptual Model <br /> 12ATEZ May 23,2001 <br /> PREPARED BY Secor <br /> n <br /> AQUENDUM EDED Submit by <br /> ADEQUATE AND NECESSARY ELEMENTS,OF THE WORKPLAN[H86 25299 37,subd(c)(3)] <br /> 1 Tosco will 4nsull three addztronal monitoring wells and one continuous corc to defu-ie the verrrcal and lateral <br /> exsenz of gasoline and 140E conrarr„r=on in sod and groundwater <br /> 2 Tosco will conduct a well receptor survey wnrh a 2000 foot radius <br /> 3 Tosco will began to develop a Site Conceptual Model winch wM be used to mvesugate and assess the unpacts <br /> of the release <br /> 4 All samples must be anal] for TPH-g,BTEX and fuel oxygenates <br /> COMIv1ENfS AND CONDITIONS <br /> The"Tri-Regwr al Board Staff Recornriendmons For PreLnunary-Evaluation and Investigation of Underground Tank <br /> Sites- along with us'Appendix A° and`Append.Lx B" should be used as guidance documerns All v+ork and reports <br /> a}uch require geological or engineering evaluation must be performed under the direction of in appropriate(aliform <br /> registered or certified professional <br /> DATED ( QBY <br /> Harlin Knoll.Senior REHS L2Q2) 468-3542 <br /> cc RWQCB,Central VatleyRegton-Marty H ncll <br /> Secor-Beakosky <br /> A Division of San Joaquia County Hralth Care Services <br />