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J <br /> Charles Skobrak �— <br /> 2_ May 21, 2008 <br /> Claim No. 1028 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Dec 07 DTW <br /> feet b s <br /> MW-1 <br /> Feb 92 55-75 31.45 <br /> 31.01 <br /> MW-2 Feb 92 54-74 31.47 <br /> MW-3 Feb 92 54-74 <br /> Feb 92 45-70 31.50 <br /> MW 4 40-60 31.51 <br /> MW-7 Jul 97 <br /> VW-2b Jul 97 44 54 - <br /> V`W-3 Jul 97 35-55 <br /> VW-4 Jul 97 34-54 <br /> VW-5b Jul 97 26 41 <br /> VW-5c Jul 97 45-55 <br /> • MTBE THREAT CLASSIFICATION: D <br /> • LAND USE DESIGNATION: residential and commercial <br /> • ESTIMATED WATER QUALITY OBJECTIVES (WQO'S) FOR SITE: Per the <br /> Water Quality Control Plan (Basin Plan) for the Sacramento River Basin and the <br /> San Joaquin River Basin (Fourth Edition). <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /k PRGs Water u /L WQ0* <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) m /k 07 <br /> TPH- NA NA NA NA 490,000 130,000 5 <br /> TPH-d NA NA NA NA 56,000 28,000 49 <br /> Benzene NA NA 0.64 1 1.4 150,000 21,000 0.15 <br /> Toluene NA NA 520 520 56,000 21,000 42 <br /> Eth (benzene NA NA 400 400 57,000 6,500 29 <br /> X lenes NA NA 270 420 218,000 27,800 17 <br /> MTBE NA NA 32 70 2,600 37 5 <br /> TBA NA NA NA NA 37 <10 12 <br /> 1,2-DCA NA NA NA NA 2,100 330 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 /> WQO Water Quality Objectives <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> caGfornia Euvironmenta/Protection Agency <br /> C4 Recycled Paper <br />