ARCHIVED REPORTS_2010_2011 ANNUAL MONITORING REPORT

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Table 8 Historical Soil Gas Analytical Results UPRR Storrie, California First Quarter 2011 Status Report VOCs and TPH Fixed Gases Lab GEM 2000 TotalTPH- Lab GEM 2000 Carbon Carbon GEM 2000 Lab GEM 2000 Lab Carbon Benzene Ethylbenzene Toluene m,p-Xylene o-Xylene Xylenes Gasoline Handheld PID Methane Methane Dioxide Dioxide Lab Oxygen Oxygen Nitrogen Other Monoxide Location Laboratory Sample ID Date (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppm) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) Northern Sierra AQMD Action Levels 7 7 7 0 0 0 21 152 NA NA NA NA NA NA NA NA NA RWQCB Action Levels NA NA NA NA NA NA NA NA 5,000 5,000 NA NA NA NA NA NA NA VEW-03 No sample collected 1/2/2009 NA NA NA NA NA NA NA 9 NA 0 NA 1000 NA 216,000 NA NA NA GS-2435-VEW03-011309 1/13/2009 4 0.037 J 2.3 0.14 0.23 J 0.16 170 62.2 8,800 26,000 69,000 122,000 110,000 0 820,000 852,000 <6.5 No sample collected 1/26/2009 NA NA NA NA NA NA NA 0.5 NA NM NA NM NA NM NA NA NA GS-2435-VEW03-021309 2/13/2009 0.0016J <0.0010 <0.0010 <0.0020 <0.0010 <0.0010 <0.59 NM 250 NM 37,000 NM 180,000 NM 760,000 NA <5.9 GS-2435-VEW03D-021309 2/13/2009 0.0046 <0.0010 0.0036 <0.0020 <0.0010 <0.0010 0.76 NM 320 NM 28,000 NM 190,000 NM 750,000 NA <7.1 No sample collected 2/26/2009 NA NA NA NA NA NA NA 2.3 NA 0 NA 4,000 NA 212,000 NA NA NA No sample collected 3/11/2009 NA NA NA NA NA NA NA 38.9 NA NM NA NM NA NM NA NA NA GS-2435-VEW03-032409 3/24/2009 0.18 <0.0010 0.25 <0.0020 <0.0010 <0.0010 20 24.5 8,800 9,000 84,000 90,000 53,000 170,000 840,000 NA <6.7 GS-2435-VEW03D-032409 3/24/2009 0.79 0.13 0.57 0.072 0.015 0.086 39 NA 11,000 NA 87,000 NA 36,000 NA 850,000 NA <6.4 No sample collected 4/9/2009 NA NA NA NA NA NA NA 2.7 NA NM NA NM NA NM NA NA NA No sample collected 4/22/2009 NA NA NA NA NA NA NA 2.7 NA 4,000 NA 52,000 NA 117,000 NA NA NA No sample collected 5/5/2009 NA NA NA NA NA NA NA 32.4 NA NM NA NM NA NM NA NA NA No sample collected 5/27/2009 NA NA NA NA NA NA NA 0 NA 1,000 NA 0 NA 221,000 NA NA NA No sample collected 6/16/2009 NA NA NA NA NA NA NA 18.9 NA 0 NA 2,000 NA 2055000 NA NA NA No sample collected 6/17/2009 NA NA NA NA NA NA NA 0.2 NA 0 NA 3,000 NA 202,000 NA NA NA Notes: Bold Greater than 5,000 ppmv action level NA=not applicable NM=not measured ppm=parts per million ppmv=parts per million by volume VIEW=vapor extraction well VOC=volatile organic compound TPH=total petroleum hydrocarbons PID=photoionization detector J=Estimated value. Analyte detected at a level less than the Reporting Limit(RL)and greater than or equal to the MDL. AQMD=Air Quality Management District RWQCB=Regional Water Quality Control Board Table 8-Soil Gas Analytical Results.xls ARCADIS Page 2 of 2