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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 /> Second Quarter 2009 <br /> 04/09/09 MW-02 45 31 39 590 <br /> BST-01A 45 22 46 <br /> MW-04 45 31 44 <br /> 05/27/09 MW-02 46 33 109 615 ARCADIS took over system operation 5-7-09. <br /> BST-01A 46 19 100 System inspected 5/13/09 and multiple leaks found. <br /> MW-04 46 30 90 5/27/09 data recorded after system repairs <br /> 06/17/09 MW-02 47 34 92 704 <br /> BST-01A 45 23 90 <br /> MW-04 45 30 91 <br /> 06/29/09 MW-02, 715.8 Last air compressor run time reading for the second <br /> BST-01A NM NM NM quarter 2009 <br /> and MW-04 <br /> Third Quarter 2009 <br /> 07/01/09 MW-02 <br /> BST-01A NM NM NM 716.6 <br /> MW-04 <br /> 07/21/09 MW-02 48 33 94 MW-04A-air leaking from fittings <br /> BST-01A 48 29 104 732.5 <br /> MW-04 48 30 115 <br /> 07/31/09 MW-02 Shut off MW-04A on July 23, 2009. <br /> BST-01A NM NM NM 744.8 <br /> MW-04 <br /> 08/03/09 MW-02 <br /> BST-01A NM NM NM 716.6 <br /> MW-04 <br /> Table 1 -Biosparge System O&M Data Summary.xls ARCADIS Page 2 of 3 <br />