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PuBhC HEALTH SERVICES <br />o. • • r <br />SAN JOAQUIN COUNTY <br />a: .a <br />JOGI KHANNA M.D., M.P.H. ' n <br />Health Officer <br />P.Q. Box 2009. (1601 East Hazelton Avenue) Stockton; California 95201 <br />(209) 468-3400 ' <br />October 8, 1990 <br />Ms. Margaret Russell <br />C.A. Karlson s <br />13515 Marengo Rd. <br />Galt, CA 95632 <br />I <br />RE: Karlson Bros. Trucking IN REPLY�REFER TO SITE CODE: 2375 <br />23675 S. Airport Way <br />Manteca, CA <br />A review of the Site Assessment Report�lsubmitted by William. J. <br />Hunter .and Associates, along with the. laboratory report from <br />Canonie Environmental, is now complete. :I, <br />It has been determined after careful review of the data that a <br />groundwater investigation will be required. ,Soil samples taken on <br />May 4, 1989, at ten feet below ground surface, revealed <br />ethylbenzene at .095 ppm, xylene at 1.1i ppm, and total volatile <br />petroleum hydrocarbons at 5.2 ppm. The so <br />easnal high groundwater <br />level at this site is ten feet. According to the LUFT Field Manual <br />and the Tri -Regional Staff Recommendations (enclosed), a <br />groundwater investigation is warranted. <br />A preliminary report as ,outlined, in the Tri -Regional <br />Recommendations "Appendix All (enclosed) must,be submitted to this <br />office by December 31, 1990. <br />i3 <br />If you have any questions, contact Greg Lyon, EHS, of my staff, at <br />(2 09) 468-3450. I <br />Ik <br />Jogi Khanna, M.D., M.P.H. <br />ealth Officer <br />I3 <br />Laurie A. Cotulla, REHS, Program Managerl� <br />Environmental Health Division <br />LAC/GL:nr <br />Enc. <br />A Division of San Joaquin County Health Care Services <br />