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San Joaquin County DlREca <br /> Donna Heran,RENS <br /> p?Qu+N •C Environmental Health Department ASSISTANT DIRECTOR <br /> Laurie Cotulla,REHS <br /> _ a 600 East Main Street <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman,REHS <br /> �. Mike Huggins,REHS,RDI <br /> C .= �P Website: www.sjgov.org/ehd Margaret Lagorio,REHS <br /> �1FOR 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 OCT 17 2007 <br /> 212 N SAN JOAQUIN STREET SUITE A <br /> STOCKTON CA 95202 <br /> RE: Agricultural Commissioners Office SITE CODE: 1793 <br /> 503 E. Tenth Street <br /> Tracy CA 95376 <br /> San Joaquin County Environmental Health Department (SJCIEHD) has reviewed Groundwater <br /> Monitoring Report, Second Quarter 2007(Report) dated October 5, 2007, prepared on your <br /> behalf by Ramage Environmental, Inc. (Ramage) and has the following comments. <br /> The Report documents a routine quarterly groundwater monitoring and sampling event that was <br /> conducted at your site in June 2006. Three groundwater monitoring wells associated with this <br /> site were sampled; reported analytical results were non-detect for all constituents analyzed. In <br /> the Report Ramage recommends consideration of the site for regulatory closure. <br /> SJCIEHD has discussed the potential for closure of this site with a representative of the <br /> Regional Water Quality Control Board, Central Valley Region (CVRWQCB). Before the <br /> CVRWQCB will consider this site for closure, it must be evaluated for vapor intrusion and gross <br /> contamination. The CVRWQCB uses the San Francisco Bay Regional Water Quality Control <br /> Boards Tier I Environmental Screen Levels (ESL's) for evaluation of the risk posed from <br /> remaining soil and groundwater contamination. Concentrations of contamination in soil samples <br /> collected at this site do not pass the ESL's for total petroleum hydrocarbons and benzene; a soil <br /> vapor survey needs to be completed. Please prepare a work plan to collect and analyze <br /> shallow soil vapor samples and submit it to SJCIEHD no later than December 7, 2007. <br /> If you have any questions or comments please call Lori Duncan at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Lerma 1�-�-+-tom_ <br /> Lori Duncan, Senior REHS Margaret Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Program Coordination Unit IV <br /> cc: James Barton, CVRWQCB <br /> Joe Ramage, Ramage Environmental, Inc. <br />