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r <br /> PUBLIC HEALTH SERVICES P4U[N <br /> SAN fOAQUIN COUNTY r' <br /> r. <br /> JOG[KHANNA M.D.,H.P.H. � l <br /> Hesith Officer <br /> .0 `P <br /> P.O. Box 2009 (1601 East Hazelton Avenue) 0 Stockton, California 95201 F b a <br /> (209) 468-3400 <br /> BRETT HUNTER <br /> CHEVRON USA —. <br /> P O BOX 5004 <br /> SAN RAMON CA 94583-0804 APR 12 1993 <br /> RE: Chevron Station 90302 SITE CODE 1706 <br /> 6421 Paddock Pl. <br /> Lodi, CA 95242-9500 <br /> On May 2 and 3, 1991 three (3) monitoring wells were constructed at this site as part of an environmental <br /> assessment conducted by Sierra Environmental Services of Martinez, California. Only one (1) groundwater <br /> sampling event has taken place, on May 9, 1991. Although San Joaquin County Public Health Services, <br /> Environmental Health Division (PHSlEHD) does not normally comment on environmental assessments, the <br /> results of the May 1991 investigation cannot be considered an accurate assessment of the subsurface conditions <br /> of the site since no data is available to the soil or groundwater downgradient of the existing underground tanks <br /> and piping. <br /> Please submit to PHS/EHD the analytical data and the sample locations of the soil samples taken at the June <br /> 1990 tank venting system update- <br /> After a review of this data, PHS/EHD will determine if this site will require further investigation. <br /> PHS/EHD is concerned that a municipal well exists within 100 feet of the tank pit area in the downgradient <br /> position. This well, owned by the San Joaquin County Fire Department, should be sampled to investigate <br /> whether or not contamination has impacted this downgradient well. <br /> In addition the on-site monitoring wells should be measured and sampled to confirm gradient and the previous <br /> sample results. <br /> Please direct your submittals and inquiries to Michael Infurna of my staff at (209) 468-3454. <br /> Jogi Khanna, M.D_;KP.H. <br /> Health Offiicer/ <br /> Laurie A. Cotulla, REHS, Program Manager <br /> Environmental Health Division <br /> LAC/MI:Ib <br /> c: Sierra Environmental Services c: San Joaquin County Fire Department <br /> PO Box 2546 Chief Ken Lavoie <br /> Martinez, CA 94553 1810 E. Hazelton St. <br /> Stockton, CA 95205 <br /> A DMs of San Jmyum County Hr th('.are Xmces <br />