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JM Equipment Co. • -3- • April 14, 2011 <br /> Claim No. 12607 <br /> D. Groundwater Trends: Benzene trends are shown below, source area and down <br /> gradient, respectively <br /> BENZENE Results for MW-9 <br /> 35000 <br /> 30000 <br /> 25000 __.s --• �..Y' <br /> j 20000 <br /> m 15000_ ----- -- <br /> 10000 <br /> —___ _10000 <br /> 5000 <br /> v_r BENZENE <br /> BENZENE Results for MW-8 <br /> 16 <br /> 14 i <br /> 10 -- - -- - ��. --•,, — .— <br /> 7— <br /> Ile 114P 'Ie X <br /> .BENZENE - <br /> VII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: former retail gasoline station <br /> B. Site History: the extent of groundwater contamination is defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: large borehole drilling with injection of oxygen <br /> releasing compound has been proposed <br /> E. Residual Mass: Soil, 1658 gallons of TPHg; Groundwater, 64 gallons of TPHg. <br /> WQO will be achieved in 138 years by natural attenuation (GTI June 2009). <br /> F. Contaminant Exposure Pathway Evaluation: unknown <br /> G. Recommendation: <br /> In April 2008, the Fund recommends that the San Joaquin County LOP direct the <br /> Responsible Party, with enforcement action if necessary, to implement approved <br /> California En vironmenta/Protecdon Agency <br /> Cd Recycled Paper <br />