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Table 3 . <br /> Sod Vapor Extraction System FID Measurements <br /> Unocal Service Station 2859 <br /> 1665 Pacific Avenue <br /> Stockton California <br /> Influent Effluent <br /> Date woc we TPPH woc we TPPH <br /> Measured (ppm) (ppm) (ppm) (ppm) (ppm) (ppm) <br /> 01/17/96 7,200 40 7,160 650 240 410 <br /> 02/28/96 12,500 5 12 495 620 200 420 <br /> 03/13196 3 100 12 3 088 650 200 450 <br /> 03/27/96 4,100 60 4,040 400 195 205 <br /> 04/09/96 3,400 8 3,392 820 330 490 <br /> 04/18/96 1,200 2 1,198 500 220 280 <br /> 04/23/96 3,200 15 3,185 900 380 520 <br /> 05/02/96 2,850 12 2 838 1,050 430 620 <br /> 05/08/96 1,100 2 1 098 440 300 140 <br /> 05/16/96 1,050 13 1,037 310 60 250 <br /> 05122!96 1,450 0 1,450 740 270 470 <br /> 05/30/96 1,550 11 1,539 600 450 150 <br /> 06/06/96 1,400 0 1,400 320 250 70 <br /> 06/13/96 1450 3 1447 640 420 220 <br /> 06/18/96 1,700 1 1,699 250 210 40 <br /> 06/26/95 1,550 2 1,546 650 180 470 <br />. FID =Flame-ionization detector <br /> TPPH =Total purgeable petroleum hydrocarbons <br /> woc =Without carbon tip <br /> we =With carbon tip <br /> TPPH:s approximated by subtracting the FID we measurement from the woc measurement <br /> 31W405A120960PR XLSITABLE3 A-4 September 10, 1996 <br />