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LI r.J <br /> Tw <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> 600 East Main Street <br /> cq: < PROGRAM COORDINATORS <br /> Stockton, California 95202-3029 Robert McClellon, RENS <br /> Jeff Carruesco,REHS,RDI <br /> Website: www.sjgov.org/ehd Kasey Foley, RENS <br /> Lr�cpg <br /> Phone: (209) 468-3420 <br /> Fax: 9) 464-0138 <br /> My 24, 2010 <br /> Walter Shockey <br /> C/O Lee Shockey <br /> 117 Goodale Court <br /> Manteca, CA 95337 <br /> Subject: Shockey Trucking Site Code: 2581 <br /> 850 Milgeo <br /> Ripon, CA 95366 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the <br /> Corrective Action Plan (CAP), dated April 30, 2009, prepared by your consultant <br /> Advanced GeoEnvironmental, Inc. (AGE) on behalf of the above reference site. The CAP <br /> that was submitted includes: an introduction; an account of the underground storage tank <br /> (UST) removals that occurred in 1994; a site conceptual model (SCM); an evaluation of <br /> soil remediation alternatives; an evaluation of ground water remediation alternatives; a <br /> recommendation to complete a sensitive receptor survey; a recommendation to perform <br /> additional ground water assessment; and a recommended corrective action. <br /> The EHD has the following comments regarding the site status and the CAP: <br /> 1. On July 17, 1992, the EHD received a formal complaint regarding the operation of <br /> unregistered and unpermitted USTS at your site. The EHD performed an <br /> inspection and confirmed that six USTs were on-site and that your site was not in <br /> compliance with the UST regulations. The case was referred to the San Joaquin <br /> County District Attorney Office for compliance. In 1994, six USTS were removed <br /> under EHD permit and inspection. At that time, a diesel-like odor and soil <br /> discoloration were noted by the EHD at the UST-1 location. No corrective action <br /> was performed at that time. Soil analytical results from samples collected beneath <br /> UST-1 and collected from the soil stockpile revealed high concentrations of TPH-d <br /> (total petroleum hydrocarbon as diesel), which exceeded allowable limits. The <br /> stockpile (approximately 100 cubic yards) of diesel-contaminated soil was later <br /> placed back in the UST-1 excavation. <br /> 2. The SCM in the CAP includes: data collected from the UST removals, soil sample <br /> results from borings and monitoring wells (MW) installed on-site and off-site, and <br /> 14 years of ground water monitoring and sampling. The SCM was developed to <br /> evaluate contaminant (THP-d) fate and transport in the subsurface. Ground water <br /> at your site was last sampled on December 4, 2009. Recent ground water sample <br /> results from many of the off-site MWs are non-detect (ND). The SCM must be <br /> updated and adjusted when monitoring results show a significant change or shift in <br /> contaminant concentrations. <br />