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Cal Truck Lines -2- November 18 , 2008 <br /> Claim No". 8489 <br /> d <br /> B . Monitoring Well Information <br /> Well Designation Date Installed Screen - interval Most Recent DTW <br /> feet b s Oct 07 <br /> MWA Dec 99 ?-45 34.28 <br /> MW-2 Apr 00 ?-50 32 . 08 <br /> MW-3 Dec 99 ?-50 34. 18 <br /> MW4 Nov 00 ?45 33. 74 <br /> MTBE THREAT CLASSIFICATION : C <br /> LAND USE DESIGNATION : commercial and residential <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 (ug/L WQOS <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) (mg/kg) Dec 07 <br /> TPH-g NA NA NA NA 240,000 . 188, 000 5 <br /> TPH-d NA NA NA NA 83,000 47, 500 56 <br /> Benzene NA NA 0.64 1 .4 6,600 585 0. 15 <br /> Toluene NA NA 520 520 197000 55.2 40 <br /> Eth ibenzene NA NA 400 400 21400 602 1 29 <br /> Xylenes NA NA 270 420 17,000 618 17 <br /> MTBE NA NA 32 70 11591 <0. 5 5 <br /> TBA NA NA NA NA 117 <5 12 <br /> 112-DCA NA NA NA NA 315 123 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 /> Fp Free phase product in wells - <br /> V. FREE PRODUCT: MW-2 has contained up to 1 . 8 feet of free product. Between <br /> Jan - 00 and Oct 07 , 20 .5 gallons of free product has been removed . <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation : unknown volume <br /> California Eu vironmenta/ ProtecSon Agency <br /> pd Recycled Paper <br />