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Moore Petroleum - 4 - January 23, 2012 <br /> water supply wells or surface water receptors present within 400 feet of the Site. Drinking water <br /> at and near the Site is currently supplied by the San Luis & Delta Mendota Water Authority. <br /> Recommendation <br /> March 2008, the Fund recommends that the San Joaquin County review this site for closure. <br /> UPDATED, March 2009, the Fund continues to recommend that the San Joaquin County LOP <br /> consider this site for closure. Further investigation at this site is unlikely to benefit the people of <br /> California. <br /> UPDATED, March 2010, the Fund continues to recommend that the San Joaquin County LOP <br /> consider this site for closure. Further investigation at this site is unlikely to benefit the people of <br /> California. <br /> UPDATED, January 2011, the Fund recommends that the San Joaquin County LOP review this <br /> site for closure. <br /> UPDATED, January 2012, source area monitoring well MW-8 has historically had elevated <br /> concentrations of residual hydrocarbons in groundwater. However, after 25 years of monitoring, <br /> the groundwater plume is shrinking in size and concentration. Analytical data indicate that <br /> WQOs have been achieved in down gradient wells. Groundwater within the source area will <br /> likely remain above WQOs for years to decades. The affected shallow groundwater is not used <br /> as a source of water supply nor is it likely to be used as a source of water supply in the <br /> foreseeable future. Water users in the vicinity of the site rely on a public water supply. Based <br /> on facts in the record and hydrologic and geologic conditions at the site, the limited residual <br /> petroleum hydrocarbons that remain in soil and groundwater pose a low risk to human health, <br /> safety and the environment. The Fund recommends that the San Joaquin County LOP review <br /> this site for closure. <br /> Kir Larson, P.G. Date Robert Trommer, C.H.G. Date <br /> Engineering Geologist Senior Engineering Geologist <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br />