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L <br /> San Joaquin County DIRECTOR <br /> Donna Heran, REHS <br /> C' Environmental Health Department <br /> pA •• ASSISTANT DIRECTOR <br /> 2; 600 East Main Street Laurie Gotulla,REHS <br /> Stockton, California 95202-3029 <br /> PROGRAM COORDINATORS <br /> Carl Borgman,REHS <br /> Mike Huggins,REHS,RDI <br /> K' �P <br /> Website: www.Sjgov.org/ehd Margaret Lagorio,;REHS <br /> Q�rF°R� Phone: (209) 468-3420 Robert McClellon, REHS <br /> Fax: (209) 464-0138 .teff Carruesco,REHS,RDI <br /> AUG G 1 3 2007Kasey Foley, REHS <br /> MARY L GARDELLA TRUST SARBJIT SINGH SARAO <br /> C/O WINIFRED ALEXANDER 130.5 .S WILSON .WAY ' <br /> 525 2ND STREET STOCKTON CA 95205 <br /> SANTA CRUZ CA 95010-0968 <br /> l <br /> ESTATE OF JOE GARDELLA <br /> DENNIS CASPE ESQ <br /> 2035 N PACIFIC AVENUE <br /> SANTA CRUZ CA 95060 <br /> RE: Former Stefano's Gasoline Station <br /> 1419 East Charter Way <br /> Stockton, CA 95205: <br /> San Joaquin County .Environmental Health 'Department (EHD) has received and reviewed <br /> Additional Site Assessment and Remediation Work Plan, dated July 05, 2007, submitted by <br /> Advanced GeoEnvironmental -Inc. (AGE) on your behalf for the above-referenced site. The work <br /> I plan proposes the installation of one monitoring well; advancement of three. soil borings to be <br /> completed as ozone sparging points; and advancement of paired cone penetration testing (CPT) <br /> borings. <br /> EHD approves the installation of proposed monitoring well MW-8 to be located approximately <br /> twenty-five feet south of MW--1 and approximately thirty feet southeast of MW�-2. The well will be <br /> screened between approximately 30 and 50 feet.below ground surface (bgs). Soil samples will be <br /> collected at five-foot intervals and selected soil samples will be analyzed. for total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g); benzene,.toluene, ethyl benzene, and total xylenes <br /> (BTEX); di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), methyl tertiary-butyl ether <br /> (MTBE), tertiary-amyl methyl ether (TAME), tertiary butyl alcohol .(TBA), 1,2-dichloroethane <br /> (1,2-DCA), 1,2-dibromoethane (EDB), methanol and ethanol.. In addition to installing this well, <br /> EHD believes at least one additional monitoring well, screened in the sand zone approximately <br /> 4 sixty feet bgs, should be installed down gradient of the source area near proposed well MW-8. <br /> EHD first recommended .installing additional wells to monitor :migration of the contamination <br /> plume by letter dated January 27, 2003, and suggests you refer to this correspondence for guidance. <br /> I EHD will not approve the advancement of three soli.borings to be completed as ozone sparging <br /> points for the following reasons: <br /> • The ozone sparing system has not been operational for at least two quarters (fourth quarter <br /> 2006 and first.quarter 2007) "due.to the temporarycessation of power (electricity) to the <br /> system". If system operation cannot be maintairied, it makes little sense to add additional <br /> sparge points. <br /> I <br />,A <br />