As will be seen in the discussion, limitations in resources necessitated only partial

implementation of the interim recommendations. This was deemed acceptable because the

purpose of the exercise was not to develop a meaningful assessment of actual air pollution

impacts, but was to identify and summarize the decisions made; record and summarize the

resolution process for these decision; and provide a written record of the resources used to

complete the effort. The contractor was given a free hand in suggesting and implementing

strategies to automate processes and to accelerate the computations. Acceptance of these or

similar strategies in an actual assessment can only be addressed on a case-by-case basis

involving the relevant review authorities in the context of an actual situation.

IWAQM concludes that the findings confirm the need for active interaction between

applicant and all the reviewing authorities (EPA, State, Federal Land Managers), and that this

interaction should occur as soon as is feasible. Such interaction is needed to confirm the

assessment endpoints of interest from the Federal Land Managers. Assessments involving

Air Quality Related Values are evolving as experience is gained. It would be erroneous to

believe that the previous report, EPA (1993), and this report provides all the information

needed to define the modeling requirements. For instance, when IWAQM first issued its

suggestions regarding regional haze assessment, (EPA, 1993), one hour visibility impacts

were considered appropriate by the Federal Land Managers participating in IWAQM. When

IWAQM asked the contractor to perform the analyses summarized in this report, 3-hour

visibility impacts were deemed appropriate. As of the release of this report, consideration is

being given to 24-hour impacts as providing a better representation of regional haze impacts

than 3-hour impacts.

The IWAQM members anticipate issuing additional publications related to progress toward

meeting the IWAQM goals and objectives, the results of model evaluation studies, proposed

and recommendations on modeling systems for regulatory applications, and other topics

related to specific objectives in the MOU.



n1301 - n1302 - n1303 - n1304 - n1305 - n1306 - n1307 - n1308 - n1309 - n1310 - n1311 - n1312 - n1313 - n1314 - n1315 - n1316 - n1317 - n1318 - n1319 - n1320 - n1321 - n1322 - n1323 - n1324 - n1325 - n1326 - n1327 - n1328 - n1329 - n1330 - n1331 - n1332 - n1333 - n1334 - n1335 - n1336 - n1337 - n1338 - n1339 - n1340 - n1341 - n1342 - n1343 - n1344 - n1345 - n1346 - n13247 - n1348 - n1349 - n1350


   Flag of Portugal 


 castellano: DISPER CUSTIC DESCAR RADIA    italiano:     


 français:    português:  





deutsch: DIS CUS  DES  RAD

castellano: DIS CUS DES  RAD   english: DIS CUS DES RAD  


 português: DIS CUS DES RAD   italiano:   DIS CUS  DES RAD


français:  DIS CUS DES RAD