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Stockton Terminal and Eastern RR -2- February 29, 2008 <br /> Claim No. 14243B. Monitoring Well Information: none identified <br /> • MTBE THREAT CLASSIFICATION: X <br /> • LAND USE DESIGNATION: industrial <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 /kg) PRGs Water (ug/L WQOs <br /> Maximum Latest ResidentialIndustrial Maximum Latest (ug/L) <br /> (mg/kg) m /k Ar07 <br /> TPH-g NA NA NA NA NA NA 5 <br /> TPH-d 9,100 NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 NA NA 0.15 <br /> Toluene NA NA 520 520 NA NA 42 <br /> Eth (benzene 0.89 NA 400 400 NA NA 29 <br /> Xylenes 1.9 NA 270 420 NA NA 17 <br /> MTBE NA NA 32 70 NA NA 5 <br /> TBA NA NA NA NA NA NA 12 <br /> 1,2-DCA NA NA NA NA NA NA 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 LISEPA 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 /> B. In-Situ Soil/ Groundwater Remediation: none identified <br /> Vil. SENSITIVE RECEPTOR SURVEY: five wells identified within '/z mile of the site, <br /> wells are 719 feet east southeast, 765 feet east southeast, and 837 feet east southeast <br /> of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: industrial <br /> B. Site History: the extent of groundwater contamination is defined <br /> C. Groundwater Monitoring Summary: no monitoring history <br /> D. Remediation Summary: none identified <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> California Environmental Protection Agency <br /> Ct�Recycled Paper <br />