From:    Norm Possiel
To:      Office of Air and Radiation Docket
Date:    3/31/99
Subject: Docket # A-97-10
"Data Tapes Containing Input and Output Files for Photochemical Air 
Quality Simulations Referenced in the Preamble and RIA of the
Tier 2/Sulfur NPRM"

To whom it may concern:

Attached are two 8-mm tapes titled "Data Tapes Containing Input
and Output Files for Photochemical Air Quality Simulations
Referenced in the Preamble and RIA of the Tier 2/Sulfur NPRM",
March 31, 1999 and related reference materials for submission to
Docket # A-97-10.

Also attached is a listing of the contents of these tapes.  Each
tape contains approximately 8.5 gigabytes of data.  The tapes can
be read from a unix workstation using the unix command: "tar -xvf
[local tape device name]"

Thank you,


Norm Possiel
Air Quality Modeling Group
Emissions, Monitoring, and Analysis Division
Office of Air Quality Planning and Standards
U.S. Environmental Protection Agency
(P) 919-541-5692
(E) possiel.norm@epa.gov


cc:  Harvey Michaels, OMS