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Table 1 <br /> Historical Biosparge System Operation and Maintenance Data Summary <br /> UPRR Storrie, California <br /> First Quarter 2010 Status Report <br /> Pressure at Air <br /> Well Pressure at Wellhead Temperature at Compressor <br /> Date Description Manifold (psi) (psi) Wellhead (°F) Run time (hrs) Notes <br /> December 2008 <br /> 12/01/08 MW-02 45 32 75 476 12-01-08 CH2M HILL Start up Sparge System <br /> 12/03/08 MW-02 45 32 75 483 Perform Startup Shakedown of System for 30 days <br /> 12/05/08 MW-02 45 32 75 491 Monitor and maintain system three days per week <br /> 12/08/08 MW-02 45 32 79 493 <br /> 12/10/08 MW-02 45 32 85 500 <br /> 12/11/08 MW-02 45 32 75 503 <br /> 12/15/08 MW-02 45 32 36 506 <br /> 12/17/08 MW-02 45 31 61 520 <br /> 12/19/08 MW-02 45 1 32 52 1 522 <br /> 12/26/08 MW-02 45 31 58 536 Weekly monitoring and maintenance schedule. <br /> 12/31/08 MW-02 45 32 55 553 <br /> First Quarter 2009 <br /> 01/02/09 MW-02 NM NM NM 561 Replace air compressor <br /> 01/02/09 MW-02 45 31 58 398 Replacement air compressor hooked up to manifold <br /> 01/09/09 MW-02 47 32 52 410 <br /> 01/16/09 MW-02 45 31 69 412 <br /> 01/23/09 MW-02 45 31 51 426 <br /> 01/26/09 MW-02 45 31 65 427 BST-01A and MW-04 brought online. <br /> BST-01A 45 18 74 <br /> MW-04 45 28 49 <br /> 02/05/09 MW-02 45 32 49 459 Monitoring and maintenance schedule changed to monthly <br /> BST-01A 45 18 51 frequency. <br /> MW-04 45 30 46 <br /> 03/10/09 MW-02 45 31 39 514 <br /> BST-01A 45 22 46 <br /> MW-04 45 31 44 <br /> Table 1 -Biosparge System O&M Data Summary.xls ARCADIS Page 1 of 3 <br />