Laserfiche WebLink
slow <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> >• '-,E� .Q Donna Heran,REHS <br /> r.' 600 East Main Street <br /> �: <br /> UX :{ Stockton, California 95202-3029 PROGRAM <br /> Robert INATORS <br /> Jeff Carruesco,REHS, RD[ <br /> Cq'•.. .. ' �P Website: www.sjgov.org/ehd Kasey Foley,RENS <br /> Phone: (209) 468-3420 Linda Turkatte, REHS <br /> Fax: (209)464-0138 <br /> February 16, 2011 <br /> Mr. Joe Toste, Jr. <br /> J T Storage <br /> 2480 Toste Road <br /> Tracy, California 95377-9484 <br /> Subject: Tracy Marine Sales <br /> 2353 Toste Road <br /> Tracy, California 95377-9402 <br /> Dear Mr. Toste: <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Soil <br /> Vapor Investigation Report (report), dated 26 October 2010, prepared and submitted by <br /> your consulting firm, Advanced GeoEnvironmental, Inc. (AGE) on your behalf for the <br /> above-referenced subject site. The report discusses the collection and analysis of two soil <br /> gas samples, V-1 and V-2, collected at approximately 6 to 7 feet below surface grade <br /> (bsg), to evaluate the threat of vapor intrusion into nearby buildings. Analytical results for <br /> total petroleum hydrocarbons as gasoline (TPH-g), benzene, ethylbenzene, and methyl <br /> tertiary butyl ether (MTBE) for soil gas sample V-1 were reported above the Environmental <br /> Screening Levels (ESLs) established by the San Francisco Bay Regional Water Quality <br /> Control Board, and benzene and MTBE in soil gas sample V-1 were reported above the <br /> California Human Health Screening Levels (CHHSLs) published by the Office of <br /> Environmental Health Hazard Assessment, California Environmental Protection Agency <br /> (EPA). Based on these results and historical analytical soil data, AGE has recommended <br /> submitting a work plan for a limited subsurface excavation to remove the remaining <br /> shallow petroleum hydrocarbon impacted soil. <br /> Prior to considering additional remediation near the location of V-1, the EHD directs that a <br /> Tier 2 Human Health Risk Assessment be completed using site-specific data in the <br /> standard risk models, such as the United States EPA version of the Johnson and Ettinger <br /> model, to evaluate and estimate risk. Submit the results from the Tier 2 investigation to <br /> the EHD by 11 May 2011. If results from the Tier 2 modeling exceed a carcinogen risk of <br /> 1 x 10-6 or a hazard index of 1.0, then additional soil gas samples should be collected to <br /> verify the original results. (Note that any additional soil gas samples should be collected <br /> at sampling points located closer to or below the building structure, if possible.) <br /> If it is determined, following the collection of additional soil gas samples, that vapor <br /> intrusion into the adjacent building is a concern at this site, then submit a Corrective Action <br />