ACKNOWLEDGEMENTS

The members of IWAQM acknowledge the special efforts of H. Andrew Gray, Mary P.

Ligocki and Christopher A. Emery of Systems Applications International in conducting the

analyses and summarizing the results presented in this report under EPA Contract No. 68-D-

30019, Work Assignment 2-94 with John S. Irwin as the Work Assignment Manager.

The members of IWAQM acknowledge the peer review comments provided by several

separate groups. We found the comments to be insightful and helpful towards providing a

complete and understandable description of work. Recognizing the constraints of resources

and time, every effort was made to address the comments received. Despite everyone's

assistance, however, some errors and inadequacies no doubt exist, which of course are

IWAQM's sole responsibility. Review comments were received from:

Utility Air Regulatory Group (UARG) comments received from Robert J. Paine and David

W. Heinold of ENSR Consulting & Engineering, commissioned by Lucinda Minton

Langworthy of Hunton & Williams.

Stephen F. Mueller of the Tennessee Valley Authority.

Northeastern States for Coordinated Air Use Management (NESCAUM) comments

coordinated by Paul Wishinski of the Vermont Air Pollution Control Division.

Southern Appalachian Mountains Initiative (SAMI) comments received from Kenneth L.

McBee of the Virginia Department of Environmental Quality.

Western States Air Resources (WESTAR) comments from Clint Bowman of Washington

Department of Ecology, Patrick Hanrahan of the Oregon Department of Environmental

Quality, and Steven F. Weber of the North Dakota Division of Environmental Engineering.

Acronyms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Study Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Study Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 REVIEW OF THE SCRAM BBS FILES AND EXAMPLE PROBLEM . . . . . . 2-1

Evaluation of BBS Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Implementation of Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

3 DEMONSTRATION OF THE PHASE 1 MODELING SYSTEM . . . . . . . . . . . 3-1

Modeling Domain Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Sources to Be Modeled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Modeling Episode Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Development of Meteorological Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Development of Background Air Quality Inputs . . . . . . . . . . . . . . . . . . . . . . 3-33

MESOPUFF II Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35

Data Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36

Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39

4 SOURCE IMPACTS AS A FUNCTION OF DISTANCE . . . . . . . . . . . . . . . . . 4-1

Input Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Application of MESOPUFF II for Ring Sources . . . . . . . . . . . . . . . . . . . . . . 4-3

Application of MESOFILE for Ring Sources . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Results from Ring Source Simulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Problems Encountered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33

Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33

5 SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Status of the MESOPUFF II Modeling System . . . . . . . . . . . . . . . . . . . . . . . 5-1

Demonstration Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Impacts as a Function of Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R-1

Appendix A: INTERAGENCY WORKGROUP FOR AIR QUALITY MODELING

Appendix B: BASELINE DETERMINATION

Appendix C: DESCRIPTION AND USER'S GUIDE FOR NEW

MESOPUFF II PRE- AND POSTPROCESSORS

Appendix D: ISCST2 APPLICATION AND INTEGRATION

 

 

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

 

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