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San Joaquin County DIRECTOR <br /> Pfl uIN <br /> �o JP, r co Environmental Health Department Donna Heran, REHS <br /> gSSISTANTD/RECTOR I <br /> 2 N, i 600 East Main Street LOune Cotulla,REHS <br /> Stockton, California 95202-3029 <br /> / <br /> PROGRAM COORDINATORS <br /> Carl©orgman,REHS <br /> Mike Huggins,REHS.RDI <br /> \< ko=, Website:www.sjgov.org/ehd Margaret Laorio,REHs <br /> Phone: (209) 468-3420 Robert M,,Cleilon,REHS I <br /> Fax: (209)464.0138 Jeff Carruesro,REHS,RDI I <br /> February 25, 2008 Kasey Foley REHS <br /> Ms Kelly Bay <br /> Del Monte Foods <br /> 205 N. Wiget Lane <br /> Walnut Creek, CA 94598 <br /> Subject: Del Monte Disco Site <br /> 1 Site Code: 2498 <br /> 110 N. Filbert St. RO#: 0000188 <br /> Stockton, CA 95205 Global ID#: T0607700499 <br /> t <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 END, and James Barton for the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB), <br /> i <br /> The extent of the dissolved hydrocarbon plume in ground water and the status of the f <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 frorn 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 /> I <br /> Del Monte was informed that cleanup goals for this site are based on Water Quality E <br /> Objectives (WOOs) 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 /> i <br /> 110 Filbert Mtg CML 2-21-08 t i <br /> t <br /> i <br /> t <br />