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San Joaquin County DIRECTOR <br /> Donna Heran,REHS <br /> pn <br /> Environmental Health Deartment <br /> ?fir -f OG M ASSISTANT DIRECTOR <br /> 600 East.Main Street Laurie Cotulla,REHS <br /> , III s Stockton, California 95202-3029 <br /> PROGRAM COORDINATORS <br /> i <br /> Carl Borgman,REHS <br /> c P Mike Huggins,REHS, RDI <br /> Website: www.sjgov.org/ehd <br /> FOR Margaret Lagorio,REHS <br /> Phone: 209 <br /> ( ) 468-3420 Robert McClellon,REHS <br /> Fax: .(209)464-0138 Jeff Carruesco,REHS, RDI <br /> Kasey Foley,REHS <br /> Dick & Belinda Mar APR 1.8- & J <br /> 681 Whipporwill Street <br /> Stockton, CA 95210 <br /> I <br /> I <br /> Subject: The Auto Factory SITE CODE: 0708 <br /> 5942 North Highway 99 <br /> East Frontage Road <br /> Stockton CA 95212 <br /> San Joaquin County Environmental Health Department (EHD) has discussed the status of <br /> the above subject contaminated underground storage tank (UST) site with a representative <br /> of the Regional Water Quality.Control Board, Central Valley Region (RWQCB). The RWQCB <br /> has requested further investigation. and delineation of the petroleum hydrocarbon <br /> contamination reported in soil samples from boring EGC-3. Specifically, the reported result <br /> from sample EGC-3-3 for total petroleum hydrocarbons -(TPH). as diesel exceeds the San <br /> Francisco Bay Regional Water Quality Control Board Environmental Screen Levels for direct <br /> exposure (reported value is 579 milligrams per kilogram [mg/kg]; allowable limit is 150. <br /> mg/kg) and the contamination remaining in the soil must be investigated for future uses of <br /> the property for soil gas emissions to indoor air. I <br /> The EHD recommends resampling the. area of concern, and/or.modeling the site to evaluate <br /> the risk presented by the remaining contamination in soil. In addition, the monitoring well f <br /> location may not be downgradient from the residual contamination, and.the grab groundwater j <br /> sample from ECG-2 had 11173°micrograms per liter TPH diesel. Therefore, collection of a <br /> confirmation water sample is. recommended. Please prepare a work plan for further <br /> investigation of the site and submit it to the EHD no later than June 27, 2008. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. I <br /> Sincerely, <br /> i <br /> f <br /> Lori Duncan, Senior REHS Margare agorio, REHS <br /> Registered Environmental Health Specialist Program Coordinator <br /> c: James Barton, CVRWQCB, 11020 Sun Center Drive#200,.Rancho Cordova, CA 95670. <br /> Eric Price, Ground Zero Analysis,. Inc., 1714 Main Street, Escalon.CA 95320 <br /> i <br /> I <br />