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14 <br /> Michael McMaster <br /> Page 2 <br /> Please submit a work plan to completely define the extent of <br /> contamination and the interim remediation (re-excavation) plan by <br /> June 3, 1991. Due to the makeup of -the soil (predominantly sand) <br /> at least two (2) borings should extend to the soil/water interface . <br /> to determine if a groundwater investigation is necessary. <br /> Included in the work plan should be a comprehensive Quality <br /> Control/Quality Assurance (QA/QC) plan which incorporates sample <br /> handling, decontamination of equipment (between every bore hole) <br /> and complete chain of custody documentation. (Neither the sampler <br /> nor the laboratory personnel signed the document. ) <br /> If you have an questions, please contact Eleanor Ratliff, REHS, of <br /> my staff at (209) 468-3454. <br /> Jogi Khanna, M.D. -, M.P.H. <br /> Health O icer <br /> s <br /> urie A. Cotulla; REHS, Program Manager <br /> Environmental Health Division <br /> LAC/ER:nr <br /> c: CVRWQ CB <br /> c: Wallace-Kuhl and Associates <br /> P.O. Box 1137, West Sacramento, CA 95691 <br /> t <br /> i <br />