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9Den's`Auto Repair =r4 - 1{ 3 i fApril'2012 <br /> BENZENE Results for MW8 j <br /> e r Fib QT Te 80 - i'S iiia ,tj. l a <br /> ri ciity lj:M, #t r.� _y rt� " 70- ` � — - - - tyl .'. �F;i syi+�c►► <br /> �:a3Y,ev'i.�i.�s in hilt)w 60- <br /> 1 <br /> 50 <br /> 40-1 <br /> 77, <br /> E <br /> 0: 301 <br /> 1 <br /> 01 <br /> b;+,4 a` a,m' e, <br /> .F.:wJI�•~IrL�F;t i; . ,..,.....BENZENE +�Trertd� - 4%w"'r{.U0,17 '4 <br /> Risk Evaluation <br /> F1 �"° �.a. sr? r.'C f 4.r}� ;^ Ftw t++"t??"tye°!s tky'riP r,. .•ti..r.t F r r ,.., If, ..a'1 p <br /> There are nolwater supply wells or surface water receptors.present within 1,600 feet of the Site. <br /> Drinking water at and near the Site-is currently supplied by•the'California Water Service' <br /> _. t`.� fdr.,iw..+.a;•4T��'�7„ <br /> Re omme tlatio D *tP f 4 mdf t: t'`. <br /> -r .�•nk, <br /> in April 2008'the Fund,recom mends that the San Joaqu n,county LOP,direct theResponsible <br /> Party to asse,ss'remedial technologies and implement active remediation that w 'achieve'achieve Water <br /> Quality Objectives in a timely manner. The Fund will review this site next year to track progress.. <br /> .UPDATED, April 2009, the San Joaquin County LOP approved an ozone injection pilot study. <br /> The`Fund concurs with this action and will review this site next year to track progress. <br /> UPDATED, April 2010, by letter ori 15 April 2010, the San Joaquin County LOP directed`the <br /> `Responsible'Party conduct ozone injection bench scale study. pThe Fund concurs and will <br /> review this site next year to track progress <br /> UPDATED, March 2011, monitoring wells (MW-2a and MW-2b) screened in the source area <br /> have'consistently had elevated concentrations of residual hydrocarbons in.groundwater. <br /> However, after 13 years of monitoring, the groundwater plume is largely limited to the source . <br /> area. Analytical data indicate that WQOs have been achieved in down gradient of the source <br /> area. Groundwater within the source area will likely remain above WQOs for decades to <br /> hundreds of years. The Fund recommends that the San Joaquin County LOP review this site <br /> for closure. r <br /> ai <br /> 7 <br /> R r r <br />