Calculation of SO & NO For Visibility Screening=
1. Run appropriate long range transport screening model.
2. Assume no conversion of SO or NO to other species.2 X
(i.e. assume all NO is emitted as NO and that all SOX 2 2
remains inert at this step.)
3. Multiply the hourly concentrations of SO and NO by2 X
the ratios of the molecular weights of the secondary
species to the primary species.
Note: The molecular weights of SO and SO are 642 4
and 96 and the molecular weights of NO and2
NO are 46 and 62. Thus multiplying the
concentration of SO by 1.5 will yield the2
concentration of SO and multiplying the=
concentration of NO by 1.35 will yield the2
concentration of NO .
4. The averaging time of interest is generally 1-hour.
Inset 1 - Method for calculating concentrations of SO and NO=
from SO and NO .2 X
The procedures in Appendix B should be used to estimate the
5.1.3 Level I Analysis of Long Range Transport and
If a Level I approach is to be taken for depositional
impacts, it should be assumed that concentrations of SO and NO2 X
are deposited as SO and HNO (see Inset 2). Since the steady-2 3
state, Gaussian plume models do not actually remove any mass
from the plume, when run in their recommended modes, this will
provide a conservative deposition estimate.
n1251 - n1252 - n1253 - n1254 - n1255 - n1256 - n1257 - n1258 - n1259 - n1260 - n1261 - n1262 - n1263 - n1264 - n1265 - n1266 - n1267 - n1268 - n1269 - n1270 - n1271 - n1272 - n1273 - n1274 - n1275 - n1276 - n1277 - n1278 - n1279 - n1280 - n1281 - n1282 - n1283 - n1284 - n1285 - n1286 - n1287 - n1288 - n1289 - n1290 - n1291 - n1292 - n1293 - n1294 - n1295 - n1296 - n1297 - n1298 - n1299 - n1300
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