NH3 ppb back-calculated from IMPROVE data 2005-2007; data from file: am4c_0407.csv

mean BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 Jan 0.3752 0.2351 0.3613 0.2751 0.2343 0.2629 0.3493 0.3015 Feb 0.3589 0.2942 0.3042 0.3529 0.2127 0.3269 0.3469 0.2508 Mar 0.3544 0.2773 0.2756 0.2922 0.302 0.281 0.4042 0.296 Apr 0.4758 0.4677 0.5024 0.5038 0.476 0.4703 0.6119 0.4561 May 0.4906 0.5111 0.4825 0.4926 0.5341 0.4376 0.7136 0.4546 Jun 0.6403 0.539 0.5138 0.5086 0.5842 0.5674 0.7727 0.5759 Jul 0.5155 0.5057 0.4888 0.5131 0.5255 0.4402 0.724 0.4223 Aug 0.5332 0.4886 0.4498 0.4811 0.5555 0.3945 0.6634 0.4109 Sep 0.5363 0.3807 0.4013 0.3938 0.4393 0.3495 0.5781 0.3932 Oct 0.4403 0.3269 0.3448 0.2883 0.4053 0.3437 0.5107 0.3614 Nov 0.3659 0.3537 0.3149 0.31 0.3733 0.2797 0.511 0.3373 Dec 0.3012 0.2771 0.4538 0.3654 0.2314 0.2634 0.3265 0.2754

standard deviation

BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 Jan 0.4014 0.2052 0.2578 0.2125 0.1433 0.1815 0.2502 0.1798 Feb 0.2567 0.2443 0.1732 0.2941 0.1244 0.1664 0.2161 0.128 Mar 0.1857 0.1365 0.137 0.148 0.1625 0.1324 0.2195 0.1216 Apr 0.1973 0.2101 0.2338 0.234 0.2461 0.1889 0.2851 0.2102 May 0.1882 0.1711 0.1656 0.1783 0.2451 0.1436 0.2578 0.1603 Jun 0.2575 0.2694 0.1908 0.249 0.267 0.1762 0.2595 0.2178 Jul 0.1875 0.198 0.1861 0.2255 0.202 0.1623 0.2731 0.1462 Aug 0.3556 0.1951 0.1574 0.1835 0.2122 0.1546 0.247 0.125 Sep 0.2934 0.1111 0.132 0.1397 0.1674 0.1316 0.2566 0.1397 Oct 0.3167 0.1426 0.1648 0.1203 0.2061 0.2434 0.2859 0.1868 Nov 0.1998 0.2852 0.1385 0.1857 0.2298 0.1766 0.2898 0.1897 Dec 0.18 0.2571 0.2823 0.2689 0.1731 0.1908 0.2405 0.2167

maximum BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 Jan 2.0724 0.7284 0.9466 0.9612 0.5739 0.8643 1.0927 0.658 Feb 1.1246 1.1885 0.8139 1.2178 0.5043 0.6714 0.8775 0.4865 Mar 0.9308 0.4998 0.6705 0.7013 0.7191 0.5257 1.0691 0.5811 Apr 1.0735 0.9963 1.2268 1.1069 1.1041 0.9107 1.297 1.0625 May 1.0736 0.9071 0.7769 0.7824 1.1409 0.6676 1.3865 0.7451 Jun 1.4971 1.3866 1.1726 1.389 1.408 1.1635 1.5381 1.2243 Jul 1.11 0.9525 1.0593 1.106 1.0471 0.8611 1.3471 0.8039 Aug 1.8202 0.9529 0.8823 0.8314 1.0455 0.7317 1.4674 0.6794 Sep 1.176 0.5945 0.6683 0.7442 0.7864 0.791 1.1651 0.6992 Oct 1.5262 0.6146 0.6081 0.5587 0.8477 1.1634 1.3027 0.7741 Nov 0.984 1.404 0.6695 0.7394 1.0639 0.8903 1.1326 0.8802 Dec 0.8938 0.9996 1.1277 1.0273 0.838 0.9799 1.3937 0.8982

counts BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 Jan 31 28 31 29 30 31 31 30 Feb 28 28 24 24 28 28 26 27 Mar 31 28 26 31 29 27 31 30 Apr 26 30 30 28 29 30 30 30 May 26 31 31 30 31 30 27 31Jun 29 27 25 28 28 29 26 24

Jul 29 30 31 21 31 29 29 28 Aug 30 29 31 22 28 25 31 24 Sep 26 29 24 26 28 29 29 23 Oct 31 29 26 25 29 29 31 30 Nov 29 30 30 24 30 29 30 30 Dec 31 29 31 30 30 31 31 31

ratio of max to mean

BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 Jan 5.5 3.1 2.6 3.5 2.4 3.3 3.1 2.2 Feb 3.1 4.0 2.7 3.5 2.4 2.1 2.5 1.9 Mar 2.6 1.8 2.4 2.4 2.4 1.9 2.6 2.0 Apr 2.3 2.1 2.4 2.2 2.3 1.9 2.1 2.3 May 2.2 1.8 1.6 1.6 2.1 1.5 1.9 1.6 Jun 2.3 2.6 2.3 2.7 2.4 2.1 2.0 2.1 Jul 2.2 1.9 2.2 2.2 2.0 2.0 1.9 1.9 Aug 3.4 2.0 2.0 1.7 1.9 1.9 2.2 1.7 Sep 2.2 1.6 1.7 1.9 1.8 2.3 2.0 1.8 Oct 3.5 1.9 1.8 1.9 2.1 3.4 2.6 2.1 Nov 2.7 4.0 2.1 2.4 2.8 3.2 2.2 2.6 Dec 3.0 3.6 2.5 2.8 3.6 3.7 4.3 3.3

year 2.9 2.5 2.2 2.4 2.4 2.4 2.5 2.1 all 2.4

mean + 2 standard deviations

BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 Jan 1.178 0.6455 0.8769 0.7001 0.5209 0.6259 0.8497 0.6611 Feb 0.8723 0.7828 0.6506 0.9411 0.4615 0.6597 0.7791 0.5068 Mar 0.7258 0.5503 0.5496 0.5882 0.627 0.5458 0.8432 0.5392 Apr 0.8704 0.8879 0.97 0.9718 0.9682 0.8481 1.1821 0.8765 May 0.867 0.8533 0.8137 0.8492 1.0243 0.7248 1.2292 0.7752 Jun 1.1553 1.0778 0.8954 1.0066 1.1182 0.9198 1.2917 1.0115 Jul 0.8905 0.9017 0.861 0.9641 0.9295 0.7648 1.2702 0.7147 Aug 1.2444 0.8788 0.7646 0.8481 0.9799 0.7037 1.1574 0.6609 Sep 1.1231 0.6029 0.6653 0.6732 0.7741 0.6127 1.0913 0.6726 Oct 1.0737 0.6121 0.6744 0.5289 0.8175 0.8305 1.0825 0.735 Nov 0.7655 0.9241 0.5919 0.6814 0.8329 0.6329 1.0906 0.7167 Dec 0.6612 0.7913 1.0184 0.9032 0.5776 0.645 0.8075 0.7088Estimation of ammonia background from monthly back-calculated NH3 from IMPROVE monitors See below:average over all areas of monthly maxes; meve values from Sather et al.

PEFO1 SAPE1 SYCA1 WEMI1 WH PE1 WH RI1 avg.mo.mean avg.mo.max

ENSR val 0.3206 0.1998 0.2699 0.1687 0.1676 0.1302 0.26 0.79 0.2 0.2853 0.2101 0.2851 0.1779 0.2104 0.1815 0.27 0.74 0.2 0.3515 0.2649 0.3593 0.2293 0.2545 0.2188 0.30 0.68 0.5 0.5568 0.4359 0.5336 0.3891 0.3868 0.3613 0.47 1.02 0.5 0.5916 0.4624 0.5699 0.3899 0.4166 0.3899 0.50 0.89 1 0.7248 0.613 0.6493 0.4615 0.516 0.4383 0.58 1.32 1 0.5402 0.5319 0.5633 0.3497 0.4005 0.3533 0.49 0.95 1 0.6402 0.456 0.5891 0.357 0.4021 0.3363 0.48 1.03 1 0.5471 0.4503 0.4753 0.3203 0.379 0.2953 0.42 0.84 1 0.4606 0.3821 0.4566 0.2813 0.3075 0.2072 0.37 0.94 0.5 0.4607 0.3235 0.4411 0.2237 0.262 0.1927 0.34 1.02 0.5 0.2378 0.1442 0.2409 0.1434 0.1505 0.1308 0.25 0.83 0.2

PEFO1 SAPE1 SYCA1 WEMI1 WH PE1 WH RI1 0.1761 0.1145 0.1633 0.1253 0.1081 0.0784 0.1397 0.1219 0.1875 0.0957 0.156 0.1212 0.1512 0.1269 0.2123 0.1152 0.1408 0.1062 0.2292 0.1637 0.2935 0.165 0.1635 0.1822 0.2002 0.1257 0.2365 0.1481 0.1297 0.1561 0.263 0.2585 0.3098 0.1433 0.183 0.1176 0.1842 0.2275 0.1977 0.1487 0.116 0.122 0.2507 0.2555 0.2018 0.1326 0.1852 0.1043 0.3068 0.2139 0.214 0.1513 0.1757 0.0977 0.2131 0.2851 0.2768 0.1803 0.2328 0.1252 **average over all areas of monthly maxes** 0.2972 0.2649 0.2738 0.1745 0.2119 0.1371 0.1163 0.0988 0.1499 0.1084 0.1539 0.0959 am 1 PEFO1 SAPE1 SYCA1 WEMI1 WH PE1 WH RI1 avg.mo.max avg.mo.mean

am 1 ENSR val 0.6553 0.4744 0.568 0.6593 0.4211 0.3223 0.79 0.26 0.2 0.5886 0.453 0.7599 0.4296 0.7125 0.5178 0.74 0.27 0.2 0.7922 0.598 0.8686 0.4963 0.6472 0.4891 0.68 0.30 0.5 1.0992 0.8372 1.2822 0.8084 0.7469 0.7473 1.02 0.47 0.5 1.0037 0.6992 1.2052 0.6802 0.6323 0.7286 0.89 0.50 1 1.6627 1.5918 1.8462 0.8467 1.0064 0.7096 1.32 0.58 1 0.9758 1.0679 0.9218 0.8402 0.6031 0.5486 0.95 0.49 1 1.447 1.163 1.1181 0.7384 0.9363 0.5774 1.03 0.48 1 1.2144 0.9737 0.9997 0.6168 0.7981 0.5288 0.84 0.42 1 0.9597 1.4683 1.1083 0.7091 0.9544 0.5351 0.94 0.37 0.5 1.449 1.2176 1.2313 0.8623 1.0289 0.7512 1.02 0.34 0.5 0.5532 0.4777 0.55 0.5301 0.8303 0.4735 0.83 0.25 0.2

PEFO1 SAPE1 SYCA1 WEMI1 WH PE1 WH RI1 30 24 30 31 23 31 27 22 27 28 18 27 25 25 25 31 28 28 27 28 30 30 28 30 31 27 30 31 30 3028 29 29 28 27 29

26 29 29 30 27 28 28 25 25 31 29 29 24 25 29 28 29 27 30 29 29 31 31 30 27 25 28 30 28 30 19 29 30 30 31 30

PEFO1 SAPE1 SYCA1 WEMI1 WH PE1 WH RI1 2.0 2.4 2.1 3.9 2.5 2.5 2.1 2.2 2.7 2.4 3.4 2.9 2.3 2.3 2.4 2.2 2.5 2.2 2.0 1.9 2.4 2.1 1.9 2.1 1.7 1.5 2.1 1.7 1.5 1.9 2.3 2.6 2.8 1.8 2.0 1.6 1.8 2.0 1.6 2.4 1.5 1.6 2.3 2.6 1.9 2.1 2.3 1.7 2.2 2.2 2.1 1.9 2.1 1.8 2.1 3.8 2.4 2.5 3.1 2.6 3.1 3.8 2.8 3.9 3.9 3.9 2.3 3.3 2.3 3.7 5.5 3.6

2.2 2.5 2.3 2.6 2.7 2.4

PEFO1 SAPE1 SYCA1 WEMI1 WH PE1 WH RI1 avg.mn+2sd avg.mo.max

avg.mo.mean 0.6728 0.4288 0.5965 0.4193 0.3838 0.287 0.63 0.79 0.26 0.5647 0.4539 0.6601 0.3693 0.5224 0.4239 0.62 0.74 0.27 0.6539 0.5187 0.7839 0.4597 0.5361 0.4312 0.60 0.68 0.30 1.0152 0.7633 1.1206 0.7191 0.7138 0.7257 0.90 1.02 0.47 0.992 0.7138 1.0429 0.6861 0.676 0.7021 0.85 0.89 0.50 1.2508 1.13 1.2689 0.7481 0.882 0.6735 1.03 1.32 0.58 0.9086 0.9869 0.9587 0.6471 0.6325 0.5973 0.86 0.95 0.49 1.1416 0.967 0.9927 0.6222 0.7725 0.5449 0.88 1.03 0.48 1.1607 0.8781 0.9033 0.6229 0.7304 0.4907 0.79 0.84 0.42 0.8868 0.9523 1.0102 0.6419 0.7731 0.4576 0.79 0.94 0.37 1.0551 0.8533 0.9887 0.5727 0.6858 0.4669 0.78 1.02 0.34 0.4704 0.3418 0.5407 0.3602 0.4583 0.3226 0.61 0.83 0.25Estimation of ammonia background from monthly back-calculated NH3 from IMPROVE monitors sjb 2009-04-27 See below:average over all areas of monthly maxes; meve values from Sather et al. max over all areas of monthly means rounded to 1 decimal EPA val max ENSR higher higher*1.5 0.8 Jan 0.38 0.2 0.4 0.6 0.7 Feb 0.36 0.2 0.4 0.6 0.7 Mar 0.40 0.5 0.5 0.8 1 Apr 0.61 0.5 0.6 0.9 1 May 0.71 1 1 1.5 1.3 Jun 0.77 1 1 1.5 1 Jul 0.72 1 1 1.5 1 Aug 0.66 1 1 1.5 1 Sep 0.58 1 1 1.5 1 Oct 0.51 0.5 0.5 0.8 1 Nov 0.51 0.5 0.5 0.8 0.9 Dec 0.45 0.2 0.5 0.8

**average over all areas of monthly maxes** rounded to 1 decimal ENSR higher higher*1.5 **am3 am4**  **am3 EPA**

**val m4 EPA** 

**meve 0.8**  **1** Jan 0.2 0.80 1.2 **0.7 1**  Feb 0.2 0.70 1.1 **0.7 1.3**  Mar 0.5 0.70 1.1 **1 1.3**  Apr 0.5 1.00 1.5 **1 1.3**  May 1 1.00 1.5 **1.3 1.3**  Jun 1 1.30 1.5 **1 1.5**  Jul 1 1.00 1.5 **1 1.5**  Aug 1 1.00 1.5 **1 1.5**  Sep 1 1.00 1.5 **1 1.5**  Oct 0.5 0.90 1.4 **1 1.3**  Nov 0.5 1.00 1.5 **0.9 1**  Dec 0.2 0.80 1.2ENSR val EPA val

0.2 Jan 0.2 Feb 0.5 Mar 0.5 Apr 1 May 1 Jun 1 Jul 1 Aug 1 Sep 0.5 Oct 0.5 Nov 0.2 Decsjb 2009-04-27

excluding IKBA rounded to 1 decimal average max higher higher*1.5 0.25 0.38 0.40 0.6 0.27 0.36 0.40 0.6 0.29 0.36 0.50 0.75 0.46 0.56 0.60 0.9 0.48 0.59 1.00 1.5 0.56 0.72 1.00 1.5 0.47 0.56 1.00 1.5 0.47 0.64 1.00 1.5 0.41 0.55 1.00 1.5 0.35 0.46 0.50 0.75 0.33 0.46 0.50 0.75 0.25 0.45 0.50 0.75Am monia scenarios sjb 2009-04-27

Suggest am3 for all Class I areas except use am4 from Mesa Verde

am 1 appears too low based on ammonia back-calculated from IMPROVE sulfate and nitrate am2 appears too high since it leads to CALPUFF nitrate over-predictions at Grand Canryon, and especially Mesa Verde am3 derived from average over all IMPROVE monitors in domain of maximum monthly back-calculated NH3 am4 derived from graph in Sather et al. paper, rough average of various sites in Four Corners area, including Mesa Verde (sites northeast of MEVE1 tended to have lower back-calculated values, so assumed that Four Corners area measurement values apply only nearby)

am 1 am2 am3 am4 am 1 ENSR val

am2 test am3 EPA val am4 EPA meve Jan 0.2 1.5 0.8 1 Feb 0.2 1.5 0.7 1 Mar 0.5 1.5 0.7 1.3 Apr 0.5 1.5 1 1.3 May 1 3 1 1.3 Jun 1 3 1.3 1.3 Jul 1 3 1 1.5 Aug 1 3 1 1.5 Sep 1 3 1 1.5 Oct 0.5 1.5 1 1.5 Nov 0.5 1.5 1 1.3 Dec 0.2 1.5 0.9 1

POSTUTIL lines

am 1 ENSR ! BCKNH3 = 0.2, 0.2, 0.5, 0.5, 1.0, 1.0, 1.0, 1.0, 1.0, 0.5, 0.5, 0.2 ! am2 test ! BCKNH3 = 1.5, 1.5, 1.5, 1.5, 3.0, 3.0, 3.0, 3.0, 3.0, 1.5, 1.5, 1.5 ! am3 EPA val ! BCKNH3 = 0.8, 0.7, 0.7, 1.0, 1.0, 1.3, 1.0, 1.0, 1.0, 1.0, 1.0, 0.9 ! am4 EPA meve ! BCKNH3 = 1.0, 1.0, 1.3, 1.3, 1.3, 1.3, 1.5, 1.5, 1.5, 1.5, 1.3, 1.0 ! Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec



### 0 0.5 1 1.5 2 2.5 3 3.5JanFebMarAprammonia,ppb 

### Scenarios for POSTUTIL background ammonia BART modeling of FCPP and NGSsjb 2009-04-27

am2 appears too high since it leads to CALPUFF nitrate over-predictions at Grand Canryon, and especially Mesa Verde am3 derived from average over all IMPROVE monitors in domain of maximum monthly back-calculated NH3 am4 derived from graph in Sather et al. paper, rough average of various sites in Four Corners area, including Mesa Verde (sites northeast of MEVE1 tended to have lower back-calculated values, so assumed that Four Corners area measurement values apply only nearby)MayJunJulAugSepOctNovDec 

### Scenarios for POSTUTIL background ammonia BART modeling of FCPP and NGS

am1 ENSR val am2 test am3 EPA val am4 EPA meve0

0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec**a m** **m o** **n i** **a ,** **p p** **b** 

### NH3 Monthly **M axima,**  **back -** **calculated from IMPROVE 2005 -** **2007**

BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 PEFO1 SAPE1 SYCA1 WEMI1 WHPE1 WHRI1 avg.mo.max avg.mo.mean am1 ENSR val am3 EPA val am4 EPA meve0

0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec**a m** **m o** **n i** **a ,** **p p** **b** 

### NH3 Monthly **M axima,**  **back -** **calculated from IMPROVE 2005 -** **2007**

BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 PEFO1 SAPE1 SYCA1 WEMI1 WHPE1 WHRI10

0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec**a m** **m o** **n i** **a ,** **p p** **b** 

### NH3 Monthly **M eans, back** **- calculated**  **from IMPROVE 2005 -** **2007**

BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 PEFO1 SAPE1 SYCA1 WEMI1 WHPE1 WHRI1 avg.mo.mean avg.mo.max0

0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec**a m** **m o** **n i** **a ,** **p p** **b** 

### NH3 Monthly **M eans, back** **- calculated**  **from IMPROVE 2005 -** **2007**

BAND1 BRCA1 CANY1 CAPI1 GRCA2 GRSA1 IKBA1 MEVE1 PEFO1 SAPE1 SYCA1 WEMI1 WHPE1 WHRI1 avg.mn+2sd avg.mo.max avg.mo.mean ENSR val