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,.� pow <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> = � Donna Heran,REHS <br /> 1868 East Hazelton Avenue <br /> Stockton, California 95205-6232 PROGRAM COORDINATORS <br /> ` Robert McClellon,REHS <br /> Jeff Carruesco,REHS,RDI <br /> Website: www.sjgov.org/ehd Kasey Foley,REHS <br /> 4�/FOR - <br /> Linda Turkatte,REHS <br /> Phone: 209 <br /> ( )4683420 Rodney Estrada,REHS <br /> Fax: (209) 464-0138 Adrienne Ellsaesser,REHS <br /> March 27, 2014 <br /> Gary Stallworth <br /> 602 California Street <br /> Stockton, CA 95202 <br /> Subject: Stallworth Auto Sales <br /> 602 California Street <br /> Stockton, California 95202 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Corrective <br /> Action Plan (CAP), dated 30 January 2014, prepared and submitted by your consulting firm, <br /> Advanced GeoEnviron mental, Inc. (AGE), on your behalf for the above-referenced site. <br /> In the CAP, AGE has proposed a work plan that includes: <br /> • Drilling and collecting soil samples for laboratory analysis by advancing a total of nine <br /> pilot soil borings, four to depths of 45 feet below surface grade (bsg) and five to 70 feet <br /> bsg to install shallow and intermediate depth injection wells; two intermediate screened <br /> wells will be advanced south and west of the well MW-7; two intermediate wells will be <br /> installed north and south of the center-most former UST; one intermediate well will be <br /> installed south of the boring 63; all four proposed shallow wells will be installed <br /> surrounding the UST area; shallow injection wells will be screened at depths of <br /> approximately 25 feet to 45 feet bsg; intermediate injection wells will be screened from <br /> 60-70 feet bsg; <br /> • Collection of soil samples for chemical analysis for total petroleum hydrocarbons as <br /> gasoline (TPH-g) and as diesel (TPH-d), benzene, toluene, ethylbenzene and total <br /> xylenes (BTEX), methyl tertiary-butyl ether (MTBE), tertiary-butyl alcohol (TBA), di- <br /> isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether <br /> (TAME), 1,2- dibromoethane (EDB), and 1,2-dichlorethane (1,2-DCA) by a California- <br /> certified laboratory; <br /> • Injection of a 5 percent hydrogen peroxide solution, under regulatory permits, utilizing <br /> wells MWAA, MW-113, MW-6, MW-7, MW-8 and nine proposed injection wells during <br /> four proposed tri-weekly events; background and progress sampling to be performed <br /> using wells MWAA, MW-6, MW-7, MW-8 and MW-10; <br />