A number of limitations were identified in the recommended

modeling system. As improvements become available, it is

intended that they be incorporated into the system.

The IWAQM recognizes that by proposing the use of a

Lagrangian puff model for use in the interim, it is not

possible to guarantee that the results will be more restrictive

than more sophisticated techniques to be proposed during Phase

2 of the IWAQM work plan. The IWAQM still asserts, however,

that the interim system is the best of currently available

alternatives for simulating the impacts of long range transport

on the PSD increments, NAAQS, and AQRVs.

R-1

REFERENCES

Benkley, C.W. and A. Bass. 1979. Development of Mesoscale Air

Quality Simulation Model: Vol. 3. User's Guide to

MESOPUFF. EPA-600/7-80-058. U.S. Environmental

Protection Agency, Atmospheric Research and Exposure

Assessment Laboratory, Research Triangle Park, NC.

Carhart, R.A., A.J. Policastro, M. Wastag, and L. Coke. 1989.

Evaluation of Eight Short-term Long-Range Transport Models

using Field Data. Atmospheric Environment, 23(1):85-105.

EPA. 1986. Guideline on Air Quality Models (Revised). EPA-

450/2-78-027R. U.S. Environmental Protection Agency,

Office of Air Quality Planning and Standards, Research

Triangle Park, NC.

EPA. 1986. Evaluation of Short-term Long-Range Transport

Models, Volumes I and II. EPA-450/4-86-016a and b. U.S.

Environmental Protection Agency, Office of Air Quality

Planning and Standards, Research Triangle Park, NC.

 

 

 

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