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Ox Mountain Catalyst Operational Data <br /> Unit#1 Permit Condition 22 <br /> Conditional Abatement Limit 0.15 g NOx/bhp <br /> Test Catalyst Post SCR Pre SCR Catalyst SCR NOx <br /> Date Hours NOx ppm NOx ppm delta Efficiency g/bhp <br /> t@ 15%02) 15%02) (ppm) Notes <br /> 3/25/2009 369 8.6 38.1 29.5 77% 0.10 Source test <br /> 5/12/2009 na <br /> 5/19/2009 1626 12 41 29 71% 0.14 * <br /> 5/29/2009 1859 10 41 31 76% 0.13 <br /> 6/2/2009 1969 10 44 34 77% 0.12 * <br /> 6/9/2009 2128 10 46 36 78% 0.12 * <br /> 6/12/2009 2198 10 45 35 78% 0.12 <br /> 6/17/2009 2301 9 44 35 80% 0.11 * <br /> 6/30/2009 2589 4 44 40 91% 0.05 <br /> 7/912009 2800 9 41 32 78% 0.11 *7/9 catalyst air cleaned <br /> 7/13/2009 2895 9 46 37 80% 0.11 <br /> 7/15/2009 2933 8 40 32 80% 0.10 <br /> 7/16/2009 2962 9 40 31 78% 0.12 <br /> 7/23/2009 3113 8 42 34 81% 0.10 * 7/20 catalyst cleaned <br /> 7/2812009 3235 10 42 32 76% 0.12 * <br /> 8/3/2009 3369 8 41 33 80% 0.10 <br /> 8/412009 3391 8 41 33 80% 0.10 <br /> 8/14/2009 3624 9 44 35 80% 0.11 <br /> 8/17/2009 3706 8 45 37 82% 0.10 9127 catalyst washed <br /> 10/16/2009 5038 10 36 26 72% 0.13 TSA C change early Oct <br /> 10/29/2009 5119 13 49 36 73% 0.17 <br /> 11/9/2009 5374 8 46 38 83% 0.10 <br /> 11/1612009 5540 9 50 41 82% 0.12 <br /> 12/21/2009 6356 11 41 30 73% 0.14 12/16 catalyst cleaned <br /> 1/11/2010 6840 7 43 36 84% 0.09 <br /> 3/3/2010 7902 8 35 27 77% 0.14 <br /> 3/12/2010 8102 10 37 27 73% 0.13 <br /> 3/23/2010 8233 8 34 26 76% 0.10 <br /> 4/8/2010 8633 8 38 30 79% 0.10 <br /> 4/21/2010 8950 7 36 29 81% 0.10 <br /> *4129,7128 catalyst <br /> 4/29/2010 9133 7 41 34 83% 0.08 washed <br /> W. 5/20 catalyst <br /> 4/30/2010 9151 7 42 35 83% 0,09 washed <br /> 5/22/2010 9673 8 41 33 80% 0.11 <br /> TSA C changed June <br /> 7R decoked; <br /> 8/4/2010 11269 7 38 31 82% 0.09 7120 catalyst washed <br /> 9/14/2010 12204 7 35 28 80% <br /> *standard cakx9ation <br /> assuming 9.7%02 in exhaust <br /> Ameresco 7 of 7 <br />