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TABLE 1 <br /> DUAL-PHASE VACUUM EXTRACTION DATA <br /> Hammer 1-5 Arco Station <br /> Stockton, CA <br /> 6/10102 through 6115102 <br /> Total Total Well Total Well Influent Total System System Influent r.Efftue'nt ".Hydrocarbon(HC) <br /> Time Vacuum Flow Concentration Flow " Concentration Concentration Recovery <br /> Date and Time (hours) (in.of Hg) (scfm) (ppmv). (scfm) (ppmv) (ppmv) Pounds Gal: Extraction Wells Utilized <br /> 06/15/02 0:30 111.50 21.4 46 240 0.072 0.012 Ah W_1 <br /> 061151021:00 112-00 21.4 46 220 0.072 0.012 MW-1 <br /> )6115102 1:30 112.50 21.3 46 21 Q 0.066 ).011 M W-1 <br /> 06/15/02 2:00 113.00 21.2 70 22D 0.085 0.014 M4141.1 <br /> 06/15/02 2:30 113.50 21.2 50 230 0.0921515 MW-1 <br /> 06/15/02 3:00 114.00 21.3 32 210 0.062 0.010 MW-1 <br /> 06/15/02 3:30 114.50 21.5 30 210 0.045 0.007 bAW_1 <br /> 06/15/02 4:00 115.00 21.5 53 230 0.063 0.010 MW-1 <br /> 06/15/02 4:30 115.50 21.5 32 230 0.067 0.011 MW-1 <br /> 06115102 5:00 116.40 21.4 5D 210 0.062 0.010 MW-1 <br /> 06/15/02 5:30 116.50 21.4 46 214 0.069 0.011 MW-1 <br /> 06/15/02 6:00 117.00 21.5 46 210 0.066 4.011 MW-1 <br /> 06/15102 6:30 117.50 21.5 45 210 0.065 0.010 MW-1 <br /> 06115/02 7:00 118.00 21.3 49 1 200 4 0.066 0.011 MW-1 <br /> 06/15/02 7:30 118.50 21.3 49 190 0.065 0.010 MW-1 <br /> 06/15/02 8:00 119.00 21.1 53 200 0.068 0.011 MW-1 <br /> 06/15/02 830 119.50 21.0 45 210 0.469 0.017 MW-1 <br /> 06/15/02 9:04 120.00 21.0 53 190 0.067 0.011 MW-1 <br /> TOTAL HC RECOVERED 23 3.7 <br /> TOTAL LIQUID RECOVERED(GAL) 19,70) <br /> i <br /> in of Hg=inches of Mercury <br /> scfm=standard cubic feet per minute <br /> i ppmv=parts per million by volume <br /> HC=hydrocarbon(s) <br /> Gal.=Gallons <br /> HC recovered in gallons=(delta Gme in hours)x(average flow in scfm)x(average concentration in ppmv)x(111,000,000)x(86 lb/379 tuft)x(60minlhr)x(1 gallonl6.2475 Ib) <br /> HC concentrations were measured with a Horiba Mexa-224GE HC analyzer with a maximum range of 10,000 ppmv, <br /> Page 8 0f8 <br />