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t � <br /> S.J.C. Dept. of General Services r <br /> May 31, 1989 h E <br /> Page 2 <br /> IT <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 /> 9. As the depth of original soil samples obtained were between 15 and 20 feet, the <br /> recommended soil borings shall be advanced toL minimum depth of 40 feet or <br /> until ground water is encountered. <br /> h � <br /> 10. Describe the extraction tube illustrated_ on Detail 2 of the above referenced <br /> workplan. <br /> I� <br /> Due to the proximity of ground water, a ground water�investigation may be necessary <br /> I <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 F Manual. <br /> Please contact Diane Hinson of my staff at (209) 468-3420, if you have any questions. <br /> Jogi Khanna, M.D., M.P.H. <br /> District Health Officer <br /> i <br /> Ron` ali" oti;'R.E:H.S., Director <br /> i <br /> Environmental Health Division <br /> RV/CW:ma <br /> cc RWQCB Region 5 T <br /> Kleinfelder, Inc.; Mark Urquhart �I <br /> I) <br /> 4 <br /> {l <br /> i <br /> 'r <br /> Ii <br /> J <br /> VIII, <br />