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Closure Objectives <br /> Complete and final closure of the site is not expected for several years. The primary cleanup <br /> goal is to reduce groundwater contamination to below 500 pg/L-of benixene. The secondary <br /> cleanup goal is to further reduce benzene to below the drinking water MCL of 1.0 gg/L. The <br /> k MCL is not likely to be reached for several decades. <br /> As asymptotic benzene concentrations between 500 and 1.0 gg/L are approached in MW- <br /> i <br /> DIS-2,the sampling frequency may be reduced from quarterly to annual. <br /> When benzene concentrations have stabilized or are no longer detectable in the groundwater, <br /> and continued monitoring is no longer fruitful, Del Monte will request a closure designation <br /> from the CVRWQCB. <br /> 1 <br /> r <br /> f <br /> 10030984.DOC 5-3 <br />