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San Joaquin County DIRECTOR <br /> Environmental Health Departmen <br /> C t DonnaHeran,REHS <br /> gyp,.... <br /> ?' = f '�G 1868 East Hazelton Avenue PROGRAM COORDINATORS <br /> 2: � '8�` :Za Robert McClellon,RENS <br /> Q, < Stockton, California 95205-6232 <br /> Jeff Carruesco,RENS,RDI <br /> j_ Kasey Foley,REHS <br /> Website: www.sjgov.org/ehd Linda Turkatte,REHS <br /> • '04- .{P Rodney Estrada,REHS <br /> 4�/FORS Phone: (209)468-3420 Adrienne Ellsaesser,REHS <br /> Fax: (209) 464-0138 <br /> August 30, 2013 <br /> CHARLES MILLER <br /> MOLLER 6591 COLLINSNVESTMENT GROUP, C. <br /> DRIVE, SUITE E-1 1 <br /> MOORPARK, CA 93012 <br /> LOP Site Code:1669 <br /> Subject: Former USA 2132 E Mariposa ion 10 <br /> Road <br /> Stockton, CA 95206 <br /> The San Joaquin County Environmental Health Department (d Dd March 7, 2013,s reviewed it Vapor First <br /> Extraction and Air Sparge Pilot Test Report (SVE/AS Report) <br /> Quarter 2013 Semi-Annual Groundwater noo <br /> ° sing a d Closure Request on Strategy Con port s( Inc.(Quarterly <br /> (ES) <br /> Report) dated July 1, 2013, prepared by your <br /> on your behalf for the subject site. The EHD review has determined that additional remediation <br /> and information is needed before closure can be considered for the site. <br /> the site and documented in the SVE/AS Report. <br /> A remediation pllot test was lied to 6 extractioncwells ted tdata collection points were monitored during he test <br /> vacuum was app Approximately 324 pounds of <br /> and vapor samples were collected for chemical analysis. App <br /> petroleum hydrocarbon were removed during the 3-day test period with an estimated radius of <br /> ly 25 feet. The air flow and hydrocarbon removal rates observed during <br /> influence of approximate <br /> as partially successful in remediating the contamination <br /> the 3 day test indicate SVE/AS w <br /> beneath the site. <br /> The Quarterly Report submitted contains groundwater sample results collected subsequent to <br /> the completion of the pilot test. Groundwater contaminant concentrations remain extremely <br /> elevated in the source area, even after the <br /> removal of contaminants <br /> by <br /> pilot <br /> testing. <br /> . Well <br /> S-1 has: 110,000 micrograms/Liter (pg/L) as total <br /> 00 pgIL <br /> benzene, and 55,000 Ng/L. The benzene and the MTBE concentrations in S-1 are above the <br /> allowable limited in the Low Threat Closure Policy (LTCP) evaluation completed in the Quarterly <br /> Report by ES and site closure cannot be considered at this time. <br /> This decision is subject to appeal to the State Water Resources Control Board (State Water <br /> Board), pursuant to H&SC section 25296.40(a) (1), (Thompson-Richer Underground Storage <br /> Tank reform Act-Senate Bill 562). Please contact the State Water Board Underground Storage <br /> Tank Program at (916) 341-5752 or visit the State Water Board internet website at: <br />