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`L gston's Market ARCb' {4- `0}�RA—,January'12,2012 <br /> Recommendation, 9.+} ' #"tt i , s t? i+ f JSotY - w L$. a� S,�if T� <br /> March 2008, the Fund recommends the Responsible Party implement active remediation <br /> without delay. The Fund will review this site next year to track progresvo.'X4 q ka 3 <br /> ?UPDATED,'March 2009, by letter'on'13 May 2008;the San JoaquinCountyLOP directed the <br /> Responsible Party to implement dual'phase extraction: The Fund concurs and recommends <br /> that active remediation begin without unnecessary delay."The Fund will review this site next <br /> bq #T. -m% <br /> year to track progress,r <br /> 'UPDATED, March 2010 this site has been under investigation for 20 years.:-By letter on 8 <br /> January 2010, the San Joaquin County LOP approved an oxygeninjection pilot test The Fund <br /> concurs and will review this site next year to track progress. <br /> UPDATED, January 2011, the Fund recommends that the San Joaquin County LOP review this <br /> site for closure. <br /> UPDATED, January 2012, source areamondonng wells MW-1 and MW-5 has historically had <br /> elevated concentrations of residual hydrocarbons'in groundwater. However, after 11 years.of <br /> monitoring, the groundwater plume is shrinking in size and concentration. 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 affected shallow groundwater is <br /> not used 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 the City of Lathrup. Based_ on <br /> 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. ' n <br /> 5 <br /> Kir Larson, P.G. Date Robert Trommee, C.H.G. Date ° <br /> 'Engineering Geologist W a Senior Engineering Geologist <br /> x. Technical Review Unit Chief, Technical Review Unit . <br /> (916) 341-5663 (916) 341-5684 <br /> a � f <br /> ° <br /> �� s..i�..; :eo-'-.'�x.s��.�n .yr° . C .t"Aix `t� 4 `�+'.'^'.� Y .. ' i+lpw ir.'`T .. ��,�'',�•. . x 'w' e,��! 1 <br /> .. � � �nF t .�,�.�'� 4.y � °M r rt ; '� 'JJ�+�VL'�'k ah.. .. . 51.t•r y. Sy�`'� r "i C;. �. ' �± <br />