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S.J.C. Dept. of General Services <br /> May 31, 1989 <br /> Page 2 <br /> 8: The workplan should address the,contaminated soil remaining in the tank pit. <br /> The soil may be a continuing source of.further contamination. <br /> A <br /> 9. As the depth`of original soil samples obtained were between 15 and 20 feet, the <br /> recommended soil borings shall be advanced to a minimum depth of 40 feet or <br /> until;ground water is encountered. <br /> n, <br /> 10. Describe .the extraction tube illustrated Iron Detail 2 of the above referenced <br /> ' 1 <br /> workplan:' <br /> Due to the proximity of ground water, a ground water investigation may be necessary <br /> regardless of the outcome of this soil evaluation. Tri-Regional Guidelines for Initial <br /> Evaluation and Investigation of Underground Storage Tanks shall be followed, as well <br /> as guidance presented in the LUF I' Manual. ' <br /> Please contact Diane Hinson of m staff at 209 468-3420 if you have an questions. <br /> Y t ) � Y Y <br /> Jogi Khanna, M.D., M.P.H. <br /> District Health Officer . <br /> Ronal/o-d"RE:H:S., Director <br /> Environmental Health Division <br /> I <br /> RV/CW:ma <br /> cc RWQCB, Region 5 <br /> Kleinfelder, Inc.; Mark Urquhart <br /> I <br />