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PUBLIC AEALTH S <br /> SAN JOAQUIN COUNTYQ"f" <br /> ENVIRONMENTAL HEALTH DIVISION P z <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, C <br /> 209/468-3420 `+v.Q 1J <br /> 17 <br /> FRANKLYN COLE MAILED APR 2 5 1996 <br /> P O BOX 1114 <br /> TRACY CA 95378-1114 <br /> RE: Reichs Grocery SITE CODE: 1642 <br /> 7505 W Linne Rd. <br /> Tracy, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the Corrective Action Plan (CAP) dated December 6, 1995, prepared by <br /> Advanced Geo-Environmental, Inc. and your letter dated March 21, 1996, for the above <br /> referenced site. <br /> PHS/EHD had anticipated using a computer modeling program to make a risk based <br /> decision on the necessity of remediation at your site. Unfortunately, that computer <br /> model has still not been obtained by PHS/EHD. In order to expedite decisions regarding <br /> remediation of your site, your consultant will have to submit the computer modeling <br /> information as part of a revised CAP or a closure request. <br /> Figure 3, in the CAP submitted in December 1995, did not reflect the piping sample <br /> obtained at 6 feet below grade (fbg) with levels of benzene, toluene, ethyl-benzene, and <br /> xylene (BTEX) at <250 parts per million (ppm), 390 ppm, 910 ppm, and 610 ppm <br /> respectively, and total petroleum hydrocarbons as gasoline at 48000 ppm. The lines <br /> depicting the estimated extent of TPH-g, on Figure 3, from 15 fbg to surface, are not <br /> correct. Figure 3 should be revised and the above mentioned soil sample results from <br /> below the piping should be included in the revised figure. Although contamination <br /> appears to be limited to soil at this site currently, given the site specific conditions the <br /> contamination poses a threat to groundwater. In addition, since there are domestic <br /> water wells on site, there are receptors for any groundwater contamination that may <br /> result from the current levels of soil contamination. <br /> The CAP submitted did not address clean-up levels. If remediation is required according <br /> to a computer model using the site specific conditions, then the clean-up levels required <br /> for your site should be set accordingly. These clean-up levels are required as part of <br /> the CAP. <br /> The remediation of the contamination at this site should not require the installation of <br /> another vapor extraction well as proposed in the December 1995 CAP. Also, if <br /> remediation is necessary, the time required for remediation should be based on the <br /> A Division of San Joaquin Counh Health Care Services <br />