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PUBLIC HAALTH SERVICPS <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION f' <br /> Karen Furst, M.D., M.P.H., Health Officer �q a P.. <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 `' f <br /> 209/468-3420 FILE C O P <br /> PHILLIP ELDER/JAY QADDOURA <br /> RAINWATER CARWASH <br /> 420 W YOSEMITE MAY 0 6 1999 <br /> MANTECA CA 95337 <br /> RE: RAINWATER CARWASH SITE CODE: 231458 <br /> 420 W YOSEMITE AVE <br /> MANTECA CA 95337 <br /> On April 15, 1999, only 6 of the 8 Geoprobe soil borings proposed in the "Preliminary <br /> Site Assessment Work Plan" dated May 07, 1998 and "Work Plan Addendum" dated <br /> March 12, 1999 prepared by Advanced GeoEnvironmental , Inc., were advanced at the <br /> above referenced site. The proposed slant boring southeast of the former USTs and the <br /> proposed boring near the elbow of the north pipeline of the former USTs were not <br /> done. San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS-EHD) recommends that these areas be addressed in the next investigation. <br /> PHS/EHD staff has noted very strong oxygenate and petroleum hydrocarbon odor in <br /> the majority of the soil and ground water samples collected from the soil borings on <br /> April 15, 1999. The field screening instrument (Photoionizarion Detector) also <br /> indicated hydrocarbons in the soil samples collected at the vadose, capillary fringe, and <br /> saturated zones. Odor was noted in the soil samples collected as deep as 35 feet below <br /> surface grade (bsg), the approximate vertical limit of the investigation. The vertical and <br /> horizontal extent of the contamination has not been defined. Submit a report of the <br /> April 15, 1999 work to PHS/EHD by May 30, 1999. Submit a work plan that will <br /> define the vertical and horizontal extent of the contamination to PHS/EHD by July 1, <br /> 1999. <br /> If you have any questions, please feel free to contact Jeffrey Wong at (209) 468-0335. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> i <br /> Jeffrey Wong, REHS ✓ Margare agorio, RENS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> c: RWQCB, Central Valley Region- Mark List <br /> c: Advanced GeoEnvironmental, Inc. -Tim Cuellar <br /> A Division of San Joaquin County Health Care Services <br />