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q T DIRECTOR .I <br /> San Joaquin County Donna Heran,REHS <br /> OPquIN Environmental Health Department ASSISTANT <br /> SSISTAC luDIRECTOR <br /> Laurie°c REHS <br /> 600 East Main Street <br /> a3! `r ?< Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> m Cad Borgman,REHS <br /> f - Mike Huggins,RENS,RDI i <br /> j p Website: Www.sjgov.org/ehd Margaret Lagorio,RENS 1 <br /> Robert McCleilon,REHS <br /> �IFo Phone: (209)468-3420 _ Jeff Carruesco,RENS,RDI <br /> Fax: (209)464-0138 Kasey Foley,REHS <br /> l��T <br /> February 25, 2008 <br /> IWAA-n z/L5�o9 <br /> Ms Kelly Bay <br /> Del Monte Foods <br /> 205 N. Wiget Lane <br /> Walnut Creek, CA 94598 <br /> Subject: Del Monte Disco Site Site Code: 2498 <br /> 110 N. Filbert St. RO#: 0000188 <br /> Stockton, CA 95205 Global ID#: T0607700499 <br /> A meeting was held at the office of the San Joaquin County Environmental Health <br /> Department (EHD) on February 13, 2008 to discuss the ongoing groundwater <br /> remediation, cleanup goals, and requirements for closure of your site at 110 Filbert <br /> Street and a possible change in site ownership. In attendance at the meeting were <br /> yourself representing Del Monte Foods, David Lennon, Dennis Maslonkowski, and Amy <br /> Wilson of TRC Consulting, Margaret Lagorio, Nuel Henderson, and Michael Infurna <br /> from the EHD, and James Barton for the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB). <br /> The extent of the dissolved hydrocarbon plume in ground water and the status of the <br /> current remedial effort (soil vapor extraction and air and ozone injection) were also <br /> discussed. It was concluded, based on the contaminant mass removal rate of the soil <br /> vapor extraction (SVE) system that little hydrocarbon contamination apparently remains <br /> in the upper non-water bearing (vadose) zone soil; based on the low contaminant <br /> concentrations recovered from each well recently, the EHD agrees that a period of <br /> rebound testing is appropriate at this time. Most of the contamination remaining on site <br /> appears to be adsorbed or absorbed (collectively referred to as `sorbed') to soil in the <br /> saturated zone in the area of,the former underground storage tanks (UST) or is <br /> dissolved in ground water extending southward of the former UST area. Current/ <br /> remedial action includes onsite air injection (air sparging) for total petroleum <br /> hydrocarbons as gasoline (TPHg) and benzene and ozone injection (ozone sparging) <br /> for 1,2-DCA offsite toward the south. Elevated concentrations of TPHg, benzene and <br /> 1,2-DCA are still present in the ground water on and offsite making it inappropriate to <br /> consider your site for regulatory closure (No Further Action, or NFA) at this time. <br /> Del Monte was informed that cleanup goals for this site are based on Water Quality <br /> Objectives (WQOs) established by the CVRWQCB. Site data must show/that the WQOs <br /> have been met or will be met in a reasonable time period under natural conditions, and <br /> i <br /> 110 Filbert Mtg CML 2-21-08 <br />