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PUBLf�e HEALTH SERVICES ,oPaU�N <br /> SAN JOAQUIN COUNTY <br /> W <br /> JOGI KHANNA Nf.D.,M.P.H. <br /> Health Officer <br /> CQCrFOp��P <br /> P.O. Box 2009 (1601 East Hazelton Avemte) Stockton,California 95201 <br /> (209) 468-3400 <br /> MAR 21- 1991 <br /> D <br /> SCOTTY S BAIT AND TACKLE INC. #2 ly <br /> 574 W GRANT LINE ROAD <br /> TRACY CA 95376 <br /> RE: Exxon Station IN REPLY REFER TO SITE CODE: 18971 <br /> 574 W. Grant Line <br /> Tracy, CA <br /> On June 11, 1986, this office received an Underground Storage Tank (UGST) Unauthorized Release (LEAK) <br /> Contamination Site Report which indicated a failed UGST precision test had occurred at the former Mobil <br /> Service Station #10-NP4 at 2375 N. Tracy Blvd.,Tracy, California. Subsequently, all UGSTs were removed <br /> and soil and groundwater sampled. Analysis of these samples documented both soil and groundwater <br /> contamination. <br /> The Mobil Oil Corporation then began a site assessment in order to determine the full extent of soil and <br /> groundwater contamination associated with the facility. A number of borings and groundwater monitoring <br /> wells have been completed both on-site and off-site, but zero lines have never been defined. <br /> In a report prepared by Mobil's consultant, Alton Geoscience, Inc., they stated, "Based on the hydrogeol6gic <br /> conditions in the area and results of the field activities and laboratory analysis, there are potentially three <br /> (3) hydrocarbon contaminant plumes in the vicinity of the site that have co-mingled: one on-site on the <br /> northeast corner of the former Mobil Property; one adjacent to the Exxon property; and one adjacent to the <br /> Chevron Property." <br /> In order to fully define the extent of groundwater contamination, this office is seeking the cooperation of <br /> the involved parties to characterize each contamination plume. Please submit a Preliminary Report (PR) for 3 <br /> the Exxon Station at 574 W. Grant Line Road, Tracy, California, to this office, by May 3, 1991. <br /> If you have any questions, contact Harlin Knoll, REHS, at (209)468-3442. <br /> Jogi Khanna,r M. ;M.P.H. <br /> Health Office <br /> a rie A. Cotulla, HS, Program Manager <br /> Environmental Health Division <br /> LAC/HK:nr <br /> c: CVRWQCB <br /> c: Mobile Oil Corporation - David M. Noe <br /> 3800 W. Alameda Ave., Ste. 700 <br /> c: BP Oil Company - Peter DeSantis j <br /> 2868 Prospect Park Drive, Ste 360 J <br /> c: Alton Geoscience - All Sevilla <br /> 1000 Burnett Ave., Ste 140 <br /> Concord, CA 94520 <br /> bc: Evelyn Costa, <br /> Board of Supervisors Office <br /> A Division of San Joaquin County Health Care Services <br />