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Yamada Bros Inc. <br /> Claim No. 17042 February 10, 2011 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> MW-1 A r 2010 <br /> Se 00 5-25 5.40 <br /> MW-2 Se 00 5-25 4.90 <br /> MW-3 Se 00 5-25 4.69 <br /> MW-4 Jun '04 5-25 5.96 <br /> MW-5 Jun 04 5-25 5.53 <br /> MW�6 Jun 04 5-25 4.68 <br /> MW-7 Jun 04 5-25 fi.04 <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 Water u /L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> A r2010 <br /> TPN- NA NA 8,400 6,000 5 <br /> TPH-cl NA NA 2,000 2,000 56 <br /> Benzene NA NA 9.5 1 <0.5 J 0.15 <br /> Toluene NA NA 9.2 <Q.5 42 <br /> Eth (benzene NA NA 50 9.8 29 <br /> X lenes NA NA 210 23 17 <br /> MTBE NA NA 390 7 <1 5 <br /> TBA NA NA <10 NA 12 <br /> 1,2-DCA NANA <17 1 NA 0.5 <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> mg/kg: milligrams per kilogram, parts per million <br /> ug/L: micrograms per liter, parts per billion <br /> WQOs: 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: <br /> • METHOD: batch extraction from MW-4 <br /> DURATION: Aug 09 through Sep 09 <br /> VOLUME OF GROUNDWATER REMOVED: 15,000 gallons <br /> Califor.oia En v1ronmenta.1 Protection Agency <br /> Qt Recyeled Paper <br />