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PUBLIC `VE <br /> ALTH SERVY' CES a4. <br /> SAN JOAQUIN COUNTY r <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. j F i �xft M.D. M.P.H. <br /> ° , Acting Health Officer <br /> 44S N. San Joaquin Street • P.O. Box 388 a Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> TZWART <br /> 452 LLOIAM WBL AVENUE `JUN 151994 <br /> TRACY CA 95376 <br /> RE: Bill's Bait & Beacon Gas SITE CODE: 1400123 <br /> 515 W. Eleventh Street <br /> Tracy, CA <br /> On April 21, 1994, the product and vapor piping associated with the former <br /> underground storage tanks (UST) was removed from the above referenced site under <br /> the inspection of San Joaquin county Public Health Services, Environmental Health <br /> Division (PHS/EHD) staff. Three soil samples were collected from beneath the <br /> piping in December 1988. The soil sample collected in the area of the east <br /> dispenser island had evidenced diesel contamination at that time. During removal <br /> of the piping no odor or discoloration of the soil was observed by PHS/EHD staff <br /> so no further soil sampling was required. <br /> PHS/EHD has reviewed the "Quarterly Report" dated March 1994, prepared by <br /> Geological Audit Services, Inc. for the above referenced site. The table of <br /> groundwater sample results still does not indicate that the water samples from <br /> monitoring well 01 (MWl) were diluted for analysis. In the future, dilution <br /> factors should be noted on diluted sample results. <br /> Groundwater in the area of MW1 is still evidencing contaminants. Contaminated <br /> soil remains in place north, east and west of the former UST area. The report <br /> discusses further excavation of soil, vapor extraction, air sparging, and <br /> bioremediation as remedial options. The report recommends further excavation but <br /> states that if this "will impair operations" a vapor extraction test should be <br /> conducted. PHS/EHD concurs with both these recommendations. <br /> Quarterly sampling, monitoring, and reporting must continue until the site is <br /> clean. Please notify PHS/EBD prior to any site activities. <br /> If you have any questions contact Margaret Lagorio, Senior RENS, at (209) 468- <br /> 3449. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Zare Lagorio, Lead Senior REHS Diane . Hinson, RENS <br /> Site Mitigation Unit Supervisor <br /> ML <br /> c: CVRWQCB - Beth Thayer <br /> c: Geological Audit Services, Inc. <br /> A Dhision of San Joaquin County Health Care Services <br />