Calculated In worksheet

YearMonth Clinker Produced (tons) Nox (Tons from CEMs) Nox Rate (Lb/ton clinker) 2003 Jan-03 58,581 2003 Feb-03 53,234 2003Mar-03 40,695 2003 Apr-03 41,776 2003May-03 59,866 2003 Jun-03 49,610 2003 Jul-03 60,132 2003Aug-03 55,638 2003 Sep-03 56,038 2003 Oct-03 58,013 2003 Nov-03 44,787 2003 Dec-03 47,460 2004 Jan-04 31,877 2004 Feb-04 43,560 2004Mar-04 45,520 2004 Apr-04 0 2004May-04 30,303 2004 Jun-04 54,424 2004 Jul-04 54,722 2004Aug-04 56,701 2004 Sep-04 51,374 2004 Oct-04 45,675 2004Nov-04 40,843 2004 Dec-04 0 2005 Jan-05 9,899 2005 Feb-05 49,514 129.41975 5.228 2005Mar-05 52,687 83.77565 3.180 2005 Apr-05 59,010 88.54975 3.001 2005May-05 61,584 49.66255 1.613 2005 Jun-05 55,633 49.00145 1.762 2005 Jul-05 57,039 54.69905 1.918 2005Aug-05 62,754 58.08235 1.851 2005 Sep-05 49,276 67.3403 2.733 2005 Oct-05 57,004 86.86222862 3.048 2005Nov-05 41,320 71.3801 3.455 2005 Dec-05 53,369 64.60425 2.421 2006 Jan-06 59,766 110.07655 3.684 2006 Feb-06 39,217 61.58133549 3.141 2006Mar-06 45,021 86.96905 3.863 2006 Apr-06 57,686 94.9381 3.292 2006May-06 56,977 90.84 3.189 2006 Jun-06 54,030 87.7458 3.248 2006 Jul-06 54,997 91.52895 3.329 2006Aug-06 60,666 107.87715 3.556 2006 Sep-06 54,395 101.17495 3.7202006 Oct-06 60,515 122.3193 4.043

2006Nov-06 58,696 112.46175 3.832 2006 Dec-06 52,723 107.64355 4.083 2007 Jan-07 38,893 72.17835 3.712 2007 Feb-07 43,216 70.7632 3.275 2007Mar-07 57,714 93.6193 3.244 2007 Apr-07 60,454 103.32395 3.418 2007May-07 61,461 102.3488 3.331 2007 Jun-07 54,977 90.67895 3.299 2007 Jul-07 57,768 92.1296 3.190 2007Aug-07 63,103 103.14735 3.269 2007 Sep-07 40,146 54.69645 2.725 2007 Oct-07 55,043 90.6203 3.293 2007Nov-07 57,949 96.0835 3.316 2007 Dec-07 54,673 96.65505 3.536 2008 Jan-08 55,076 101.27925 3.678 2008 Feb-08 49,803 81.35035 3.267 2008Mar-08 32,850 58.00645 3.532 2008 Apr-08 38,636 11.0904 0.574 2008May-08 61,770 56.3973 1.826 2008 Jun-08 58,132 85.10655 2.928 2008 Jul-08 61,586 100.67945 3.270 2008Aug-08 60,467 111.1107 3.675 2008 Sep-08 55,735 123.12325 4.418 2008 Oct-08 221 1.0814 9.786 2008Nov-08 33,860 46.1335 2.725 2008 Dec-08 56,561 76.72675 2.713 2009 Jan-09 62,602 88.60295 2.831 2009 Feb-09 45,697 70.52555 3.087 2009Mar-09 0 0 2009 Apr-09 23,567 37.63575 3.194 2009May-09 59,315 94.00895 3.170 2009 Jun-09 54,887 74.64 2.720 2009 Jul-09 49,608 71.45234587 2.881 2009Aug-09 52,037 78.92062966 3.033 2009 Sep-09 47,421 65.19522 2.750 2009 Oct-09 54,714 63.879225 2.335 2009Nov-09 55,853 80.785295 2.893 2009 Dec-09 23,734 29.70252 2.503 2010 Jan-10 0 0 2010 Feb-10 41,839 83.23764 3.979 2010Mar-10 59,400 83.50592 2.812 2010 Apr-10 57,695 95.63801 3.315 2010May-10 54,094 86.068635 3.182 2010 Jun-10 57,154 48.1305 1.684 2010 Jul-10 55,799 85.192 3.054 2010Aug-10 58,414 91.14 3.1202010 Sep-10 56,673 79.621 2.810

2010 Oct-10 55,227 87.35 3.163 2010Nov-10 53,508 89.258 3.336 2010 Dec-10 7,513 13.6605 3.636 2011 Jan-11 0 0 2011 Feb-11 36,895 38.6385 2.094 2011Mar-11 58,510 98.4175 3.364 2011 Apr-11 57,955 93.4795 3.226 2011May-11 56,568 89.844 3.176 2011 Jun-11 55,487 78.8765 2.843 2011 Jul-11 62,391 87.416 2.802 2011Aug-11 61,073 81.0275 2.653

Minimum Rate Maximum RateCalculated in Worksheet

12-month Nox Average Rate (lb/ton clinker)

2.772 2.607 2.648 2.674 2.823 2.952 3.079 3.247 3.3283.420 3.455 3.590 3.589 3.595 3.545 3.556 3.567 3.570 3.557 3.530 3.464 3.395 3.348 3.304 3.311 3.310 3.328 3.148 2.998 2.965 2.974 3.012 3.152 3.142 3.099 3.018 2.934 2.917 2.879 3.065 3.225 3.204 3.164 3.088 2.902 2.842 2.854 2.853 2.856 2.935 2.921 2.950 2.950 2.842 2.859 2.8702.874 2.953 2.995 3.025 3.025 2.890 2.949 2.940 2.940 3.060 3.032 2.982

2.607 3.595