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J Aril 15, 2010 <br /> Central CA Traction Co -2- April. <br /> Claim No. 16496 <br /> B. MonitoringWell Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Nov 09 <br /> MW-1 Sep 00 35-50 - <br /> MW-2 Sep 00 35-50 - <br /> MW-3 Sep 00 35-50 - <br /> MW-4 Nov 01 35-50 - <br /> MW-5 Jun 08 ?-67 55.28 <br /> MW-6 Jun 08 ?-67 55.21 <br /> MW-7 Jun 08 ?-67 55.29 <br /> • MTBE THREAT CLASSIFICATION: X <br /> • LAND USE DESIGNATION: residential and commercial <br /> • ESTIMATED WATER QUALITY OBJECTIVES (WQO'S) FOR SITE: Per the <br /> Water Quality Control Plan (Basin flan) 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 Water (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> 1999 Nov 09 <br /> TPH NA NA 2,000 55 5 <br /> TPH-d 22,000 12,000 94,000 520 56 <br /> Benzene 12 28 28 <0.5 0.15 <br /> Toluene 11 NA 22 <0.5 42 <br /> Eth (benzene 61 NA 550 <0.5 29 <br /> Xylenes; <1.2 NA 2,400 <1 17 <br /> MTBE <1.2 NA 35 <0.5 5 <br /> TBA NA NA <5 <4 12 <br /> 1,2-DCA NA NA <1 3.1 0.4 <br /> Lead NA NA NA NS 15 <br /> PCE NA NA NA NA 0.06 <br /> TCE NA NA NA NA 0.8 <br /> NA Not Analyzed,Not Applicable,or Data Not Available <br /> WOO Water Quality Objectives <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: 10,400 tons of contaminated soil was excavated in 2005 <br /> B. In-Situ Soil/ Groundwater Remediation: none identified <br /> VII. SENSITIVE RECEPTOR SURVEY: five wells identified within Y2 mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: tractor facility <br /> B. Site History: the extent of groundwater contamination is known and limited. <br /> California Environmental Protection Agency <br /> CARmmiedF per <br />