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Boulevard Automotive `- -3- lw' May 23, 2008 <br /> Claim No. 12962 <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /k PRG§ Water u /L WQOs <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/k m /k Nov 07 <br /> TPH- NA NA NA NA 360,000 200,000 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 56,000 23,000 0.15 <br /> Toluene NA NA 520 520 41,000 29,000 42 <br /> Eth (benzene NA NA 400 400 17,000 7,100 29 <br /> Xylenes NA NA 270 420 102,000 26,000 17 <br /> MTBE NA NA 32 70 73 <1 5 <br /> TBA NA NA NA NA 560 <10 12 <br /> 1,2-DCA NA NA NA NA 1,600 300 0.5 <br /> Lead NA NA 400 800 NA NA 15 <br /> PCE NA NA 17 130 NA NA 0.06 <br /> TCE NA NA 0.11 110 NA NA 0.8 <br /> PRGs USEPA Region 9 Preliminary Remediation Goals <br /> MCL Maximum Contaminant Levels <br /> AL Action Level <br /> NA Not Analyzed, Not Applicable,or Data Not Available <br /> Woo Water Quality Objectives <br /> V. FREE PRODUCT: up to 0.03 feet of free product. <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil/ Groundwater Remediation: none identified <br /> C. Groundwater Trends: <br /> Benzene trends are shown below: <br /> Claim 12962 <br /> 60000 <br /> 50000 - --- – -- <br /> 40000 �_MW-4 <br /> cc 30000 --m—NNV-10a <br /> RI 20000 MW-17 <br /> m <br /> 10000 – <br /> 0 <br /> d. o`' 05 do d° A� o� <br /> Fe's POA Q0�O PoA QZV P°°� Qe� Poo 'e'o Q�0 <br /> Time <br /> California Environmental Protection Agency <br /> ed Rey,/,dPp, <br />