Laserfiche WebLink
J <br /> Roek Construction -3- April 4, 2008 <br /> Claim No. 7881 <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /k PRGs Water (ug/L WQOs <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) (mg/kg) Nov 07 <br /> TPH- NA NA NA NA 260,000 140,000 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 24,000 16,000 0.15 <br /> Toluene NA NA 520 520 44,000 26,000 42 <br /> Eth (benzene NA NA 400 400 3,300 2,600 29 <br /> Xylenes NA NA 270 420 9,000 1 12,000 17 <br /> MTBE NA NA 32 70 140,000 2,200 5 <br /> TBA NA NA NA NA 670 ND 12 <br /> 1,2-DCA NA NA NA NA 2,600 1,600 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: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil Remediation: none identified <br /> • METHOD: soil vapor extraction <br /> • DURATION: Nov 97 through present <br /> C. Groundwater Remediation: <br /> METHOD: groundwater extraction <br /> California Environmental Protection Agency <br /> .n <br /> • p.,a Rey/ed Papec <br />