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Chevron Products -2 �''� April 4, 2008 <br /> Claim No. 5820 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Nov 07 <br /> MW-3 Mar 91 ?-60 22.52 <br /> MW-5 Nov 92 ?-55 23.27 <br /> MW-6 Nov 93 ?-58 22.49 <br /> MW-7 Dec 95 ?-52 22.11 <br /> MW-8 Nov 97 ?-42 22.42 <br /> MW-9 Jul 02 ?-33 22.16 <br /> MW-13 Apr 04 ?-30 22.53 <br /> MW-14 Apr 04 ?-30 22.20 <br /> MW-15 Apr 04 ?-51 22.43 <br /> MW-16 Apr 04 ?-30 21.51 <br /> MW-17 Apr 04 ?-30 22.42 <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 (ug/L WQOs <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) (mg/kg) (Aug07 <br /> TPH-g NA NA NA NA 29,000 8,900 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 630 300 0.15 <br /> Toluene NA NA 520 520 2,400 190 42 <br /> Eth (benzene NA NA 400 400 1,300 610 29 <br /> Xylenes NA NA 270 420 4,100 710 17 <br /> MTBE NA NA 32 70 110 6 5 <br /> TBA NA NA NA NA 460 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 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 /> California Environmental Protection Agency <br /> • P.J Recycled Paper <br />