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TAB93 • - <br /> VAPOR REMEDIATION SYSTEM STATUS <br /> THRIFTY OIL STATION#171, STOCKTON, CA <br /> Hour meter I Hours of Vapor tnlet TPHg TPHg removed Cumulative TPHg Mass Volume <br /> Date reading Operation Flow Rate Concentration within period TPHg removed Removal Rate Removed <br /> (hrs)' I (hrs) Wm) (ppmv) (ug1Q (lbs) (lbs) (Ibslhr) (gallons) Remarks <br /> 03/14/02 4 830 54 172 1 910 6635 62 747 1 23 9 959 9 Shut down system for pump test <br /> 03/19/02 4 0 174 1 910 - 62 747 9 959 9 Restarted after pump test and changed hour meter <br /> 03126102 162 158 170 1 910 194 13 62 941 1 23 9 990 7 <br /> 04102/02 320 158 172 1 910 19300 63 134 1 22 10 021 3 <br /> 04/09/02 324 4 172 1 910 4 91 63 139 1 23 10 022 1 Knockout switch shutdown VES restarted <br /> 04/16/02 329 5 172 1 910 6 14 63 145 1 23 10 023 1 Found system off power from electric pox ort <br /> 04118102 329 0 - 330 1 460 - 63 145 - 10 023 1 Monthly air sampling <br /> 05/08/02 329 0 - l 460 63 145 10 023 1 Restarted <br /> 05/14/02 331 2 173 220 990 1 59 63 147 079 10 023 3 Knockout swim shutdown VES restarted <br /> 05/21/02 503 172 172 990 10986 63 257 064 10 040 8 <br /> 05/28/02 670 167 173 990 10666 63 363 064 10 057 7 <br /> 06/04/02 726 56 172 990 3577 63 399 064 10 063 4 Found system off restarted <br /> 06111/02 743 17 - 990 1083 63 410 064 10 065 1 System shut down for Newer replacement <br /> 07!16!02 743 0 172 736 3260 - 63 410 - 10 065 1 Restarted <br /> 07/23/02 747 4 173 3 260 841 63 418 2 10 10 066 4 Found system off telt broken restarted <br /> 07/31/02 935 188 171 3 260 39425 63 813 210 10 129 0 <br /> 08/06/02 1 078 143 170 3 260 29727 64 110 208 10 176 2 Shut down system for owS <br /> 08107102 1 078 0 - 3 260 64 110 - 10 1762 Restarted <br /> 08/13/02 1 219 141 170 1 210 4 940 36756 64 478 261 10 234 5 <br /> 08/20/02 1 389 170 171 4 940 53552 65 013 3 15 10 319 5 <br /> 08/29/02 1 557 168 170 4 940 52922 65 542 315 10 403 5 <br /> 09103102 1 725 168 171 4 940 52922 66 072 3 15 10 487 5 <br /> 09110102 1 889 164 172 420 1 860 35765 66 429 218 10 544 3 <br /> 09/17/02 2056 167 172 1 860 19962 66 629 1 20 10 576 0 <br /> 09/24/02 2 227 171 170 1 860 20341 66 832 1 19 10 608 3 <br /> 10/01/02 2 392 165 172 1 860 19627 67 029 1 19 10 639 5 <br /> 10108102 2 544 152 170 1 860 180 B1 67 209 1 19 10 668 2 <br /> 10109/02 2 568 24 170 556 2 460 3296 67 242 1 37 11167341 <br /> 10/15/02 2 726 15B 170 2 460 24712 67 490 1 56 10 712 6 <br /> 10122102 2 890 164 170 2 460 25651 67 746 1 56 10 753 3 <br /> 171 ves Page 4 of 7 11/18/03 <br />