Laserfiche WebLink
Thrifty Oil -2- March 3, 2011 <br /> Claim No. 2156 <br /> • FLOW DIRECTION: northeast <br /> • SOIL TYPES: interbedded and intermixed sand, silt and clay <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> _ (Oct 2010) <br /> MW-3 May 91 45-75 34.36 <br /> MW-4 Jun 91 45-75 35.52 <br /> MW-5 Feb 96 40-60 33.25 <br /> MW-6 Feb 96 40-60 35.90 <br /> MW-7 May 94 26-56 34.52 <br /> MW-9 Feb 96 40-60 33.66 <br /> MW-10 May 96 38-58 34.26 <br /> MW-11 R Jun 08 38-58 36.46 <br /> MW-12R Jun 08 68-75 36.18 <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 (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> Oct 2010 <br /> TPH-g NA NA 316,000 31,000 5 <br /> Benzene NA NA 26,500 5,100 0.15 <br /> Toluene NA NA 33,900 2,600 42 <br /> Eth (benzene NA NA 6,680 1,000 29 <br /> Xylenes NA NA 31,400 7,200 17 <br /> MTBE NA NA 39,500 650 5 <br /> TBA NA NA 13,400 <1,000 12 <br /> 1,2-DCA I NA NA NA 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 /> FP Free phase product in site wells <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: 1,500 cubic yards of contaminated soil was excavated in 1995. <br /> California Environmental Protection Agency <br /> Ztr <br /> J' Recycled Paper <br />