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f <br /> San Joaquin County DIRECTOR <br /> Donna Heran, REHS <br /> oP°"`" Environmental Health Department <br /> �• = f OG ASSISTANT DIRECTOR <br /> _ !L 600 East Main Street Laurie Cotulla,REHS <br /> Qw a <br /> '� :{ Stockton, California 95202=3029 PROGRAM COORDINATORS <br /> Mike Huggins,REHS, RDI <br /> cq �P .s OV.00 /ehd Margaret Lagorio, REHS <br /> Website: www <br /> jg g Robert McClellon, REHS <br /> Phone: (209)468-3420 .teff Carruesco,REHS, RDI <br /> Fax: (209) 464-0138 Kasey Foley, REHS <br /> March 27, 2009 <br /> Stephanie Furgal <br /> Chevron Environmental Management Co. <br /> 6111 Bollinger Canyon <br /> San Ramon, CA 94583 <br /> Subject: Low Price Auto Glass/Former Texaco Site Code: 1322 <br /> 3978 S. Hwy 99 E. Frontage Road <br /> Stockton, CA 95215 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Site <br /> Assessment Report Addendum (Report) dated March 20, 2009, prepared on your behalf <br /> by Arcadis and has the following comments. <br /> The Report documents the installation 'of one soil boring to total depth 150 feet below <br /> surface grade (bsg) to investigate the vertical extent of the petroleum hydrocarbon <br /> contamination documented in groundwater monitoring well MW-1. One grab groundwater <br /> sample collected at 1.15 feet bsg and 14 soil _samples were submitted for chemical <br /> analysis. Laboratory analytical results reported 2,700 micrograms per liter (µg/l) total <br /> petroleum hydrocarbons as diesel (TPHd), 160 µg/I TPH as motor oil (TPHmo), 4 pg/I <br /> benzene, 1 pg/I xylenes and 3 pg/I tertiary butyl'alcohol in the grab groundwater sample. <br /> Two quarters of groundwater monitoring, sampling and analyses of all five groundwater <br /> monitoring wells currently located onsite have been completed. Reported results indicate <br /> that there is no well located downgradient of impacted MW-1. Please proceed with <br /> submittal of a work plan to install groundwater monitoring wells, both at the shallow <br /> groundwater interface level and at a deeper level to verify the results of the grab <br /> groundwater sample collected at 115 feet bsg, 'located downgradient to MW-1. The work <br /> plan is due for submittal no later than May 15, 2009. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Sincerely, <br /> Lori Duncan, REHS Nuel C. Henderson, Jr., PG <br /> Registered Environmental Health Specialist Engineering Geologist <br /> cc: Jim Barton, CVRWQCB, 11020 Sun Center Drive #200, Rancho Cordova, CA 95670 <br /> Sherrie Lang, Arcadis, 950 Glenn Drive, Suite 125, Folsom, CA 95630 <br />