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1 - - <br /> Ge®SOly® LLC - - <br /> Grrn�oa®o avee�4c�� Q:V:dl Cleo!Oaol CensUON5r.0 . <br /> C43 ©[racoon OveS'2o SonoMc0p CA 'DOM7C <br /> rJ0 Dani JUSP u'Jora aua Vour Unwronznooeaai Problorfas.L36 2-b"Vo M-oraf <br /> 1 September 08, 1997 <br /> Steve Sasson <br /> 1 Senior Environmental Health Specialist <br /> San Joaquin County, Public Health Services <br /> Environmental Health Division, Site Mitigation Unit <br /> 1 304 East Weber Avenue, 3rd Floor <br /> P.O. Box 388 Phone: (209) 468-3459 <br /> Stockton, CA 95201-0388 Via FAX: (209) 464-0138 <br /> 1 SUGDb e: SUBSURFACE ENVOROMMENUML 9MV2S40GAVBGN FOR: <br /> Ronald i'e unan/Jon Sernigan {dor Qhe Poirmer UST site Boca ft,4 a� the: <br /> r <br /> Ifown and Countm Ceon �3336 N= 8 keckefordC� <br /> She Code: 1 621 <br /> 1 Dear Mr. Sasson: <br /> The attached subsurface investigation report concerns three former gasoline <br /> underground storage tanks (LISTs) and one waste oil UST located at the <br /> above designated site. The purpose of this investigation was to determine if <br /> dormer USTs have impacted soil and/®v- groundwater beneath the site. The <br /> 1 data obtained from the investigation was used to supplement ca health- <br /> based risk evaluation. <br />' Low levels of benzene were identified in soil in the vicinity of the former <br /> USTs to a depth of approximately 26 feet bgs. Driller logs of supply wells <br /> located in the vicinity of the subject site indicate that groundwater lies <br />' beneath two, 13 to 40 feet thick, laterally continuous, clay layers, at a depth <br /> of 89 to 117 feet bgs. Other sensitive receptors were evaluated such as <br /> workers in the existing building and an apparent stormdrain manhole and <br /> 1 were determined to not be at risk from the benzene identified during this <br /> investigation. If you have any questions, please call me. <br /> rSincerely, _ <br /> r N.S J GQ���ii <br /> N� <br /> Franklin J. G man `` C€WIFIED <br /> CEO/GeoSoly, LLC tr HYDR0£EDLDGIST <br /> Registered Geologist No. 5557 <br /> Certified Hydrogeologist No. <br /> OF <br /> r <br />