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Manna Pro Corp. - 4 - `J August 16, 2011 <br /> Recommendation <br /> In March 2008, the Fund recommends that the San Joaquin County LOP direct the Responsible <br /> Party to assess the effectiveness of the current treatment systems and evaluate the need for <br /> additional air sparging locations near MW-1 to achieve Water Quality Objectives more rapidly. <br /> The Fund will review this site next year to track progress. <br /> UPDATED, March 2009, by letter on 16 June 2008, San Joaquin County LOP staff stated they <br /> intended to direct the Responsible Party to re-evaluate the treatment system and the potential <br /> for air sparging near MW-1. No such directive has been referenced in Geotracker. The Fund <br /> continues to believe the treatment system should be re-evaluated and upgraded or altered to <br /> achieve Water Quality Objectives in a timely manner. The Fund will review this site next year to <br /> track progress. <br /> UPDATED, August 2010, the Fund concurs with the San Joaquin County LOP that active <br /> remediation continue to achieve Water Quality Objectives in a timely manner. The Fund will <br /> review this site next year to track progress. <br /> UPDATED, August 2011, monitoring well MW-1 screened in the source area has consistently <br /> had elevated concentrations of residual hydrocarbons in groundwater. However, after 19 years <br /> of monitoring, the groundwater plume is largely limited to the source area. Analytical data <br /> indicate that WQOs have been achieved in down gradient wells. Groundwater within the source <br /> area will likely remain above WQOs for years to decades. The Fund recommends that the San <br /> Joaquin County LOP review this site for closure. <br /> Flo /ate / <br /> Y <br /> Kirk`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 />