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' TABLE 4 <br /> VACUUM, FLOW RATES,and CONCENTRATION DATA <br /> 1 from the COMBINED VAPOR/GROUNDWATER EXTRACTION PILOT TEST <br /> Thrifty Oil Station#171 -Stockton California <br /> GHC 1252 <br />' Field M®asured Exhaust <br /> DATE TIME Vacuum Flow Rate Concentration* Temperature <br /> Well No Inches H2O scfm Ppm <br />' 03/17/05 START UP <br /> EWS D 915 3533 11 690 1 510 <br /> 930 3466 15 80 1,474 <br /> 945 3357 15 20 1 473 <br /> 1000 3262 15 20 1,495 <br /> 1045 2800 15 60 1,467 <br /> 1100 2650 16 50 1,512 <br />' 1115 2514 16 50 1,525 <br /> 1145 1386 162 20 1 444 <br /> 1200 1400 165 0 1 457 <br /> ' <br /> 1230 1386 164 0 1 453 <br /> 1300 141 3 166 01,451 <br /> 1315 1400 167 0 1 450 <br /> 1345 1400 166 0 1 449 <br /> 1400 1413 165 0 1,453 <br /> 1430 1400 165 0 1 449 <br /> 1500 1386 165 0 1,452 <br /> 1515 1400 164 0 1 451 <br /> 1600 1400 164 0 1 453 <br /> 1630 1400 163 0 1 449 <br /> 1700 1386 165 0 1,450 <br /> lie 17 15 1386 164 0 1 454 <br /> 03/24/05 START UP <br /> ' EW5-S 715 3330 15 260 1,458 <br /> 730 3330 17 140 1,450 <br /> 745 3248 17 240 1,457 <br /> 800 3126 17 460 1,467 <br /> 815 3112 17 550 1470 <br /> 830 1291 133 i 00 1 453 <br /> 845 1250 134 100 1 454 <br /> ' <br /> 900 1250 134 120 1,457 <br /> 915 1264 134 120 1,453 <br /> 945 1630 112 190 1 453 <br /> 1015 1495 130 190 1,454 <br /> ' <br /> 1045 1427 128 200 1,464 <br /> 11 15 1427 130 230 1 452 <br /> 11 45 1427 128 260 1,452 <br /> ' <br /> 1215 1427 128 260 1 454 <br /> 1245 1427 128 280 1,450 <br /> 1315 1427 127 280 1,449 <br /> 1345 1427 127 300 1 451 <br /> ' <br /> 1415 1427 128 300 1,449 <br /> LL 14,45 1427 128 310 1 449 <br /> 15 15 1427 128 320 1 451 <br /> ' NOTES <br /> Field measurements recorded with Photoionization Detector(PID) <br /> scfm Standard Cubic feet per minute <br /> ' ppm Parts per million <br /> ' TOC 171 GHC 1252 VE MPE 1 Table 4 <br />