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San Joaquin County <br /> General Services <br /> Page 2 <br /> According to the LUFT manual , . acceptable residual levels of <br /> xylene , toluene and TPH should not exceed . 015 ppm , . 005 ppm and <br /> 10 ppm , respectfully in soil . <br /> Should you wish to further investigate your facility , we <br /> encourage a meeting to discuss plans on how to begin dealing with <br /> the problem . PHS / EHD has been designated by the <br /> State of California Water Resources Control Board as the local <br /> agency overseeing the investigation of leaking UST ' s . Copies of <br /> fourteen leaching analysis worksheets are being submitted to the <br /> County Administration for your reference . <br /> If you have any questions or require additional information , <br /> pleas contact Michael Collins , EHS , of my staff at ( 209 ) 468 - <br /> 3442 . <br /> Jogi Khanna , M . D . , M . P . H . <br /> Health Offiter <br /> L rie A . Cotulla , REHS , Program Manager <br /> vironmental Health Division <br /> LAC / MC : lb <br /> c . Raney Geotechnical - Mike Gereghty <br /> 3176 Industrial Blvd . , West Sacramento , CA 95691 <br /> c . County Administrator - Mel Wingett <br /> c . CVRWQCB - Elizabeth Thayer <br />