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Table 4 <br /> Oxygen Injection Summary <br /> 7-Eleven Store#19976 <br /> . 1399 Main Street <br /> Manteca,Cahfomia <br /> Oxygen Injection Data <br /> Cumulative Dissolved Oxygen <br /> Oxygen Mass Length of Mass Oxygen Pre- After <br /> Well Date of Volume Injected injection Injected Injection Injection <br /> Number injection Injected(ft') (pounds) (hours) (pounds) (mg/L) (mg1L) Comments <br /> i <br /> SP-1A 03/14/03 150 134 1 3 134 70 258 SP-1 &SP-1A Injected Simultaneously <br /> 04/10/02 150 134 — 267 159 356 SP-1 &SP-1A Injected Simultaneously <br /> 04/21/03 150 134 08 401 379 41 8 SP-1 &SP-1A Injected Simultaneously <br /> 05/02/03 150 134 1 5 534 244 433 SPA &SP-1A Injected Simultaneously <br /> 05/12/03 150 134 1 5 668 198 433 SP-1 &SP-1A Injected Simultaneously <br /> 07/24/03 0 00 -- 668 66 390 SP-1A not injected <br /> 08/04/03 150 134 1 0 801 — -- SPA &SP-1A Injected Simultaneously <br /> 08/19/03 150 134 1 0 935 — -- SP-1 &SP-1A Injected Simultaneously <br /> 09/05/03 150 134 1 2 1068 41 84 SP-1 &SP-1A Injected Simultaneously <br /> 09/16/03 150 134 1 0 1202 60 193 SP-1 &SP-1A Injected Simultaneously <br /> 11/07/03 150 134 1 5 1335 84 164 SP-1 &SP-1A Injected Simultaneously <br /> 12/12/03 150 134 08 1469 33 236 SP-1 &SP-1A Injected Simultaneously <br /> 12/22/03 150 134 10 1602 -- -- SP-1 &SP-1A Injected Simultaneously <br /> 01/07/04 150 134 05 1736 -- -- SP-1 &SP-1A Injected Simultaneously <br /> 01/23/04 150 134 1 0 1869 — SP-1 &SP-1A Injected Simultaneously <br /> 02/04/04 150 134 1 0 2003 -- — SP-1 &SP-1A Injected Simultaneously <br /> 02/19/04 150 134 05 2136 — — SP-1 &SP-1A Injected Simultaneously <br /> 03/05/04 150 U4 10 2270 — -- SP-1 &SP-1A Injected Simultaneously <br /> 03/22/04 150 134 05 2403 -- -- SP-1 &SP-1A Injected Simultaneously <br /> 03/30/04 150 134 05 2537 460 460 SP-1 &SP-1A Injected Simultaneously <br /> 04/12/04 150 134 08 2670 - SP-1 &SP-1A Injected Simultaneously <br /> 04/23/04 150 134 1 0 2804 401 460 SP-1 &SP-1A Injected Simultaneously <br /> 05/13/04 125 11 1 08 291 5 — -- SP-1 &SP-1A Injected Simultaneously <br /> 05/18/04 150 134 10 3048 — -- SP-1 &SP-1A Injected Simultaneously <br /> 05/24/04 150 134 10 3182 - -- SP-1 &SP-1A Injected Simultaneously <br /> 06/07/04 150 134 05 331 5 — -- SP-1 &SP-1A Injected Simultaneously <br /> 06/21/04 150 134 05 3449 -- -- SP-1 &SP-1A Injected Simultaneously <br /> 07/19/04 150 134 05 3582 -- - SP-1 &SP-1A Injected Simultaneously <br /> Explanation 729 8 otal Pounds Oxygen Injected <br /> Dissolved Oxygen Readings collected using downhole meter <br /> mg1L=milligrams per liter <br /> ft'=cubic feet <br /> 1 ft'Oz=0 089 Ib of 02 <br /> -=Not measured/not sampled <br /> 7-ELevenl7-11 Stores124248frables119976 O&M Data 04-3Q As Page 2 of 2 <br />