6.5 Exceptions to Guidance Document

It is not possible in a general guidance document like this to

anticipate all contingencies associated with developing an

attainment demonstration study. The Modeling Policy Oversight and

Technical Committees responsible for a specific modeling study may

propose an alternative photochemical modeling approach provided

that (1) the Modeling Protocol requires consensus on the proposed

alternative approach within the Technical Committee, and (2)

justification for the proposed approach is documented. Application

of any alternative photochemical modeling approach must first

receive concurrence in writing from the responsible EPA Regional

Office(s).

REFERENCES

1. Morris, R.E., T.C. Myers and J.L. Haney, 1990. User's Guide

for the Urban Airshed Model, Volume I: User's Manual for UAM

(CB-IV), EPA-450/4-90-007A, U.S. Environmental Protection

Agency, Research Triangle Park, NC (NTIS No.: PB91-131227).

2. Morris, R.E., T.C. Myers, E.L. Carr, M.C. Causley, S.G.

Douglas and J.L. Haney, 1990. User's Guide for the Urban

Airshed Model, Volume II: User's Manual for the UAM (CB-IV)

Modeling System, EPA-450/4-90-007B, U.S. Environmental

Protection Agency, Research Triangle Park, NC (NTIS No.: PB91-

131235).

3. Douglas, S.G., R.C. Kessler and E.L. Carr, 1990. User's Guide

for the Urban Airshed Model, Volume III: User's Manual for the

Diagnostic Wind Model, EPA-450/4-90-007C, U.S. Environmental

Protection Agency, Research Triangle Park, NC (NTIS No.: PB91-

131243).

4. Causley, M.C., J.L. Fieber, M. Jimenez and L. Gardner, 1990.

User's Guide for the Urban Airshed Model, Volume IV: User's

Manual for the Emissions Preprocessor System, EPA-450/4-90-

007D, U.S. Environmental Protection Agency, Research Triangle

Park, NC (NTIS No.: PB91-131250).

5. Tang, R.T., S.C. Gerry, J.S. Newsom, A.R. Van Meter, R.A.

Wayland, J.M. Godowitch and K.L. Schere, 1990. User's Guide

for the Urban Airshed Model, Volume V: Description and

Operation of the ROM-UAM Interface Program System, EPA-450/4-

90-007E, U.S. Environmental Protection Agency, Research

Triangle Park, NC (NTIS No.: PB91-131268).

 

 

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