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Knowles Family Trust -2- February 28, 2011 <br /> Claim No. 854 <br /> B. Monitoring Well Information <br /> Well Designation Date installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> Nov 2010) <br /> MW-1 Sep 98 35-65 35.36 <br /> MW-2 Sep 98 35-65 35.39 <br /> MW-3 Sep 98 25-56 - <br /> MW-4 Jan 99 41-71 34.42 <br /> MW-5 Jan 99 41-71 - <br /> MW-9 Nov 03 34-54 34.25 <br /> MW-10D May 06 90-100 35.24 <br /> MW-11 Jun 08 30-50 34.80 <br /> • LAND USE DESIGNATION: 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 (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> Nov 2010 <br /> TPH-g NA NA 250,000 120,000 5 <br /> Benzene NA NA 49,000 32,000 0.15 <br /> Toluene NA NA 19,000 19,000 42 <br /> Eth (benzene NA NA 2,700 2,500 29 <br /> Xylenes NA NA 22,000 20,000 17 <br /> MTBE NA NA 160 <250 5 <br /> TBA NA NA <2,000 <2500 12 <br /> 1,2-DCA NA NA 680 350 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 /> FP Free phase product in site wells <br /> ' Only MW-11 sampled <br /> V. FREE PRODUCT: noted free phase product in MW-5 from December 1990 through <br /> December 1993, <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: approximately 3000 cubic yards of contaminated soil was <br /> excavated in January 1990. <br /> B. In-Situ Soil/ Groundwater Remediation: none conducted to date <br /> California Environmental Protection Agency <br /> Z)A <br /> Recyc/ed Pape, <br />