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TABLE 3 <br /> Vapor Extraction Operating Data <br /> Thrifty Oil Station # 172, Stockton, CA <br /> Hour Meter Inlet Hydrocarbons Removed <br /> Date Reading Duration Flow Rate Lab Concentrations Period Cumulative Comments <br /> (hrs) (hrs) (Cfm) ppmv ug1L (Ibs) (Ibs) <br /> 4111102 7 637 168 205 2 250 2905 29 224 <br /> 4118102 7 802 165 202 (ND) 2 5 (ND) 1105 1420 29 366 <br /> 4125102 7 969 167 202 11 05 1 4 29 367 System shut down(technician on vacation) <br /> 519102 7 969 0 - 11 05 00 29 367 Restarted <br /> 5/23102 8 014 45 211 11 05 04 29 368 Knockout switch shut down VES restarted <br /> 5/30102 8 182 168 212 (ND) 2 5 (ND) 1105 1 5 29 369 <br /> 616!02 8 34B 166 213 11 05 1 5 29 370 <br /> 6113102 8 517 169 236 11 05 1 6 29 372 <br /> 6120102 8 683 166 216 1 120 4 960 3487 29 721 <br /> 6127102 8 854 171 213 4 960 6804 30 401 <br /> 713102 8 996 142 212 4 960 5598 30 961 <br /> 7110102 9 166 170 213 4 960 6701 31 631 <br /> 7118102 9 350 184 203 1 060 4 670 6892 32 320 <br /> 7/25102 9 523 173 213 4 670 6285 32 949 <br /> 811!02 9 687 164 203 4 670 5958 33 545 <br /> 818102 9 847 160 203 4 670 5673 34 112 <br /> 8113102 9 963 116 203 4 670 4113 34 523 System shut down for QWS <br /> 8114102 9 963 0 - 4 670 00 34 523 Restarted <br /> 8/15102 9 976 13 201 712 2 910 370 34 560 <br /> 8122102 9 978 2 210 2 910 45 34 565 Found system off power failure restarted <br /> 8/29102 10 147 169 203 2 910 3798 34 945 <br /> 915102 10 311 164 204 2 910 3632 35 308 <br /> 9112/02 10 485 174 201 483 2 130 3321 35 640 <br /> 9119102 10 642 157 201 2 130 2514 35 891 <br /> 9126102 10 811 169 201 2 130 2706 36 162 <br /> 1013102 10 984 173 201 2 130 2770 36 439 <br /> 10110/02 11 150 166 203 2 130 2671 36 706 <br /> 10/17/02 11 321 171 203 2 640 11,700 8978 37 604 <br /> 10/24102 11 480 159 201 11 700 1 405 4 39 009 <br /> 10/31/02 11 653 173 201 11 700 1 5216 40 531 <br /> 1117!02 11 820 167 205 11 700 1 4834 42 014 <br /> 11/14/02 11 987 167 201 1 090 4 810 1 0466 43 061 <br /> 11/19/02 12 107 120 4 810 4339 43 495 Shut down system for QWS <br /> 11/21/02 12 107 0 213 4 810 00 43 495 Restarted <br /> 11126/02 12 227 120 201 4 810 4469 43 942 <br /> 1215102 12 231 4 201 4 810 145 43 956 Found system oft switched turned off restarted <br /> 12/12/02 12 375 144 201 9 440 38 600 2 349 6 46,305 Time estimated hour meter not working <br /> 12/19/02 12 455 80 203 38 600 2 332 9 48 639 Found system off Installed new hour meter <br /> starting at 0 00 hour(old hr meter est 12455) <br /> 12/26/02 162 162 203 38,600 4 747 6 53 386 <br /> 112103 316 154 203 38 600 4 5131 57 899 <br /> 119103 481 165 203 556 2 270 2 559 9 60 459 <br /> 1116103 650 169 203 2 270 291 3 60 750 <br /> 1123103 818 168 203 2 270 2895 61 040 <br /> 1130103 984 166 201 2 270 2847 61 325 <br /> 216103 1 153 169 203 2 270 2898 61 614 <br /> 2111103 1 272 119 203 707 2 890 2331 61 847 Shut down system for QWS <br /> 2112103 1 272 0 - 2 890 00 61 847 Restarted after QWS <br /> 2/20/03 1 463 191 203 2 890 4191 62 267 <br /> 014tab3 Page 2 of 3 8/12103 <br />