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San Joaquin County DIRECTOR <br /> Donna Heran,REHS <br /> Environmental Health Department 0..,='�-�•C` ASSISTANT DIRECTOR <br /> r i 600 East Main Street Laurie Cotulla, REHS <br /> N: z � Stockton,-.California 95202-3029 PROGRAM COORDINATORS <br /> �'•: Carl Borgman,REHS <br /> Mike Huggins, REHS, RDI <br /> �'` : ' . ':P Website: uvww.s" ov.or /ehd 99 <br /> o:R� 19 g MargaretLagorio,REHS <br /> F <br /> Phone, (209)468-3420 Robert McClellon,REHS <br /> Fax: (209) 464-0138 Jeff Carruesco,REHS,RDI <br /> Kasey Foley,REHS <br /> CRAIG OGATA <br /> DIRECTOR OF FACILITIES MANAGEMENT DEC 2 4 2007 <br /> 212 N SAN JOAQUIN STREET SUITE A <br /> STOCKTON CA 95202 <br /> RE: Agricultural Commissioners Office SITE CODE: 1793 <br /> I` 503 E. Tenth Street <br /> Tracy CA 95376 <br /> San, Joaquin County Environmental Health Department'(SJC/EHD) has reviewed Work Plan, <br /> Sort Vapor Sampling and Analysis (Work Pian) dated December 7, 2007, prepared on your <br /> behalf by Ramage Environmental, Inc. (Ramage) and has the following comments. <br /> The Work Plan proposes to collect soil vapor samples for laboratory analysis, and-to input the <br /> results into a Tier 2 human health risk assessment. Currently, concentrations of contaminants <br /> in soil at the site exceed the Tier 1 environmental screen levels for gross contamination and <br /> vapor intrusion. To delineate the extent of possible hydrocarbon vapors in the shallow soil, <br /> I Ramage proposes collecting vapor samples from six-locations across the site. The samples will <br /> f be collected from a depth of five feet below'surface grade (bsg) following the California <br /> r Department of toxic Substances Control Interim Final Guidance Document. <br /> F SJC/EHD approves the proposed work. Please proceed with submittal of the site specific health <br /> and safety plan, a San Joaquin County Well Permit Application along with the required $89.00 <br /> permit fee and $294.00 permit inspection fee and with scheduling the approved work. <br /> k <br /> If you have any questions or comments please call Lori Duncan at (209)468-0337. <br /> i <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Lori Duncan, Senior REHS Nuel C. Henderson, Jr., PG <br /> LOP/Site Mitigation Unit IV Engineering Geologist Unit IV <br /> cc: James Barton, CVRWQCB <br /> Joe Ramage, Ramage Environmental, Inc. <br />