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1 <br /> 'T&T Trucking - 4 - - April 2012 4 <br /> Recommendation '- •-r.; . • r <br /> -1n May 2008, the Fund recommends that.the-San Joaquin County LOP,should direct the <br /> Responsible Party to implement active remediation to achieve.Water Quality Objectives in a <br /> timely manner. The Fund concurs with this action and will review.this site next year to'track <br /> progress. . k �• yy -, <br /> yewt �,.i..F., I.yj-}�.+'. -.l 4 � if +ice� u. 4.. � ,w'`f fix... i •i <br /> UPDATED, May 2009,this site has been under investigation fdr 14 years. The Fund concurs <br /> with the San Joaquin County LOP that active remediation should continue."The Fund will <br /> review this site next year to track progress. <br /> UPDATED, May 2010, the Fund concurs with the San Joaquin County LOP that active0 <br /> remediation-should continue-, The Fund will review this"site next ye-ar•to track progress.. <br /> UPDATED, April 2011, t}y 21.De,cember.2011•letter,"the San'Joaquin County LOP directed the <br /> Responsible Party to sample sparging wells to assess water'quality in the.source area since <br /> monitoring wells area dry.�-Tlie Fund concurs with this action.- r�' r,';. • _ r <br /> UPDATED, April 2012, source area monitoring well MW71 has historically.had elevated <br /> concentrations of residual hydrocarbons in groundwater. <br /> .However, after 16 years of monitoring <br /> and source reduction, the groundwater plume is shrinking in size and concentration. <br /> Groundwater concentrations within the source area and down gradient have achieved water <br /> quality objectives. The affected shallow groundwater is not used as a source of water supply <br /> nor is it likely to be used as a source of water supply in the foreseeable future. Based on facts <br /> in the record and hydrologic and geologic conditions at the site, the limited residual-petroleum <br /> .hydrocarbons that rernain in soil and groundwater pose little risk to human health, safety and <br /> the environment. The Fund recommends that the San Joaquin County LOP review this site for <br /> closure. <br /> x <br /> All, <br /> Kirk Larson, P.G. Date t 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 /> _ a <br /> C <br /> -. ,=i .. ,f.y. �'_� .y:.ik y. '� '�T 'k r.F 1,� . 4.r-SRw. Y•f {_ 'J rL`.i - r'�i � �*- A , <br /> - <br /> i <br />