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Table 18 Soil Vapor Extraction System-Operating Data Parcel 2A-L&M OU 666 West Weber Avenue,Stockton, CA VOCia Hourmeter Well Field Operating System FlowFID VOC FID VOC (Hexane) Reading Temperature Temp Vacuum Rate Influent Effluent Removed Vapor Control Date Notes (hours) (°F) (°F) (inHg) (scfm) (ppmv) (ppmv) (Ib/day) [2] Efficiency(%) 4/8/2011 26,527.3 63.8 677 6.5 56 26.0 0.0 0.8 100% 5/13/2011 27,014.4 80.3 650 6.8 53 200.0 0.0 2.1 100% 6/16/2011 27,828.1 85.0 646 6.8 68 1,300.0 0.0 15.7 100% 7/13/2011 28,401.5 80.0 655 6.5 56 30.0 0.0 14.2 100% 8/11/2011 28,979.4 86.5 648 6.2 63 250.0 0.0 2.9 100% 9/15/2011 29,829.7 78.9 651 5.5 96 12.0 0.1 3.6 99% 10/27/2011 30,381.2 65.0 651 6.0 145 6,000.0 0.0 125.3 100% 11/15/2011 30,834.2 62.0 651 5.7 54 5,000.0 0.0 189.2 100% 12/15/2011 31,553.5 53.2 648 5.7 51 16,000.0 0.0 190.0 100% 1/19/2012 32,392.9 52.5 651 5.4 64 1,750.0 0.0 175.5 100% 2/28/2012 33,352.3 61.8 646 5.6 90 7.5 0.0 23.3 100% 3/16/2012 33,762.1 64.5 652 5.4 67 900.0 0.0 12.3 100% 3/29/2012 33,998.7 61.6 654 9.5 98 -- 0.0 25.7 4/20/2012 34,176.9 65.3 652 7.5 401 100.4 5.0 40.3 95% 5/8/2012 34,605.9 69.7 646 6.5 475 15.0 3.0 8.1 80% 6/22/2012 34,830.7 71.7 648 6.8 451 404.2 0.3 33.3 100% 7/12/2012 35,309.2 76.5 650 6.1 496 90.7 0.0 40.5 100% 8/15/2012 35,579.6 78.7 651 5.7 512 32.0 3.0 10.4 91% 9/21/2012 36,230.8 66.0 654 9.6 207 2.0 0.0 1.9 100% 10/19/2012 36,548.1 74.2 649 7.0 270 600.0 0.0 24.8 100% 11/28/2012 37,389.8 60.0 650 7.9 139 16.0 0.0 21.8 100% 12/21/2012 g 37,447.1 -- -- -- -- -- -- -- REPORTING PERIOD: September 21,2012 to December 21,2012 Period Operation(hours): 1,216.3 Period Operational(%): 56% Historical%Operational 77% Definitions: T =Degrees Fahrenheit VOC =Volatile Organic Compounds inHg =Inches of mercury ppmv=Parts per million by volume acfm =Actual cubic feet per minute SJAVOCD =San Joaquin Valley Air Pollution Control District scfm =Standard cubic feet per minute ATC=Authority to Construct [ ]=Indicates reference to equation --=Not measured or unknown FID =Flame Ionization Detector Notes: -Column under heading VOC(Hexane)Removed(Ib/day) added 2Q10 to track removal rate of total VOCs. a=VOC reported as Hexane(molecular weight 86.17)for VOC vapor mass removal rate calculation. Hexane was used because it was most representative of the lower carbon range organics. b=System inspected by the air board and started on 5/31/2007. c=Vapor flow data collected as SCFM. d =Flow rate(acfm)derived from Roots 56 curve with temperature being the average for the system. e=Flame Out f=System switched to operate in catalytic mode. g=System shutdown due to combustion blower malfunction on December 7,2012. System left off pending repairs;samples unable to be collected. I:\Tidewater\TW Stockton(P2A)\Engineering\O&M\Tables\O&M Tables 2012\4Q12\Parcel 2A OM Tables 4Q12.xlsx