Models, Documentation, and Guidelines
In this section, section we bring you EPA's most used air quality models and guidelines. To download these files click on the filename highlighted in blue.
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| Screening Procedures |
|---|
SCREEN3 is used to estimate maximum ground-level concentration for a single source (point, flare, area, or volume) and can be used for flat or elevated terrain.
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SCREEN3D.ZIP 73,099 bytes 9/14/95 (SCREEN3 User's Guide)
SCREEN3.ZIP 155,090 bytes 9/14/95 (SCREEN3.EXE, Source Code, README.TXT) --------------------------
TSCREEN
Screening model for determining maximum short-term impact from toxic releases.
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TSCREEN1.ZIP 567,607 bytes 12/02/92 (TSCREEN, File 1)
TSCREEN2.ZIP 193,114 bytes 12/02/92 (TSCREEN, File 2)
TSCREEN3.ZIP 342,711 bytes 10/02/95 (TSCREEN, File 3)
TSCREEN4.ZIP 182,152 bytes 10/02/95 (TSCREEN, File 4)
TSCRCODE.ZIP 418,871 bytes 10/02/95 (TSCREEN Source Code)
TSCREEND.ZIP 40,448 bytes 07/24/94 (TSCREEN User's Guide - WP 5.1)
TSCRD1.ZIP 345,611 bytes 06/15/93 (TSCREEN Workbook, File 1)
TSCRD2.ZIP 598,241 bytes 06/15/93 (TSCREEN Workbook, File 2)
TSCRD3.ZIP 693,239 bytes 06/15/93 (TSCREEN Workbook, File 3)
TSCRD4.ZIP 438,688 bytes 06/16/93 (TSCREEN Workbook, File 4) --------------------------
VISCREEN
Initial screening model for visual impact caused by emissions to the atmosphere.
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VISCREEN.ZIP 121,369 bytes 08/11/92 (PC version EXE Included)
VISCRDU.ZIP 35,813 bytes 07/16/93 (User's Guide Update-WP 5.1) --------------------------
CTSCREEN
Complex terrain screening model of CTDMPLUS.
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CTSCRN1.ZIP 332,248 bytes 03/30/94 (Readme, PC EXE, Test Case)
CTSCRN1E.ZIP 254,194 bytes 03/30/94 (Extended memory executable)
CTSCRN2.ZIP 125,887 bytes 05/25/94 (Source Code)
CTSCSUP.ZIP 12,823 bytes 03/17/93 (Supplement to User's Guide)
CTPLSMOD.ZIP 117,813 bytes 03/18/93 (Report on modifications to CTSCREEN/CTD)
CTSCREEN.ZIP 109,925 bytes 04/30/91 (User's Guide-WP 5.1)
CT-NOTES.TXT 9,904 bytes 08/09/93 (Notes on Terrain Input to CTDM+/CTSCREEN)
| Regulatory Models |
|---|
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ISC3VOL1.ZIP 210,876 bytes 09/18/95 (User's Guide, Volume 1)
ISC3VOL2.ZIP 292,213 bytes 09/22/95 (User's Guide, Volume 2) --------------------------
ISCST3
Used in more detailed studies of maximum air quality impacts (Phase 3-Refined Modeling Analysis). The purpose is to compute short term concentration or deposition values, from multiple sources, on specified locations (i.e., receptors).
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ISCST3-L.ZIP 254,956 bytes 09/18/95 (ISCST3 *.EXE(Lahey))
ISCSTSRC.ZIP 163,760 bytes 09/18/95 (ISCST3 Source Code (Lahey and Microsoft))
AREATSTL.ZIP 7,798 bytes 09/18/95 (Area Source Test Case (Lahey))
DEPTESTL.ZIP 185,830 bytes 09/18/95 (Deposition Test Case (Lahey))
TEST-STL.ZIP 19,880 bytes 09/18/95 (Original ISCST Test Case (Lahey)) --------------------------
ISCLT3
ISC3 Long Term dispersion model is used to model emissions with long-term averaging periods.
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ISCLT3-L.ZIP 220,542 bytes 09/18/95 (ISCLT3 *.EXE(Lahey))
ISCLTSRC.ZIP 134,493 bytes 09/18/95 (ISCLT3 Source Code (Lahey and Microsoft))
AREALTL.ZIP 7,787 bytes 09/18/95 (Area Source Test Case (Lahey))
DEPLTL.ZIP 6,647 bytes 09/18/95 (Deposition Test Case (Lahey))
TEST-LTL.ZIP 19,979 bytes 09/18/95 (Original ISCLT Test Case (Lahey)) --------------------------
CALINE3
Air quality models used to predict pollutant concentration near roadway intersections. CAL3QHC is an enhanced version of CALINE3, with the additional traffic algorithm to estimate vehicular queue lengths at intersections with traffic stop lights. We recommend that you get both models. The theoretical information regarding the CALINE3 implementation in CAL3QHC is only presented in CALINE3 User's Guide.
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CALINE3.ZIP 52,564 bytes 06/13/91 (PC version EXE included)
CALINE3D.ZIP 23,009 bytes 08/31/93 (CALINE3 WP Format) --------------------------
CAL3QHC
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CAL3QHC.ZIP 323,189 bytes 10/19/95 (PC version EXE included)
CAL3QHCD.ZIP 130,608 bytes 10/19/95 (User's Guide/WP 5.1-CAL3QHCR Addendum included) --------------------------
FDM (Fugitive Dust Model) is an air quality model designed for computing concentration and deposition impacts from fugitive dust sources.
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FDM1.ZIP 383,939 bytes 10/08/93 (FDM.EXE, Source Code, and Readme.txt)
FDM2.ZIP 389,660 bytes 10/07/93 (FDM test case and postprocessor)
FDMD.ZIP 116,736 bytes 10/07/93 (FDM User's Guide in WP5.1)
| Emergency Release Models |
|---|
DEGADIS is a mathematical dispersion model that can be used as a refined modeling approach to estimate short-term ambient concentrations and the expected area of exposure to concentrations above specified threshold values for toxic chemical releases.
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DEGSRC.ZIP 265,013 bytes 09/15/92 (DEGADIS Fortran Source Code)
DEGEXE.ZIP 691,191 bytes 11/24/92 (DEGADIS executable)
README.DOC 33,654 bytes 08/24/92 (Installation and information)
| Related Programs |
|---|
BPIP
BPIP (Building Profile Input Program) calculates building downwash, building heights and projected building widths, for input into ISC3 model (ISCST3 and ISCLT3).
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BPIP.ZIP 91,105 bytes 04/03/95 (BPIP executable, FORTRAN code, README.TXT)
BPIPD.ZIP 52,326 bytes 02/16/95 (BPIP User's Guide) --------------------------
PCRAMMET
PCRAMMET is a very useful utility program to convert meteorological data from National Weather Service (NWS) to be used by EPA's short term air quality dispersion models such as ISCST3.
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PCRAMMET.ZIP 160,069 bytes 11/06/95 (PCRAMMET *.EXE, README.TXT)
PCREX1.ZIP 322,871 bytes 11/06/95 (PCRAMMET CD144/TD3240 fixed format example)
PCREX2.ZIP 290,711 bytes 11/06/95 (PCRAMMET SAMSON example)
PCREX3.ZIP 174,468 bytes 11/06/95 (PCRAMMET SCRAM example)
PCREX4.ZIP 322,391 bytes 11/06/95 (PCRAMMET CD144/TD3240 variable format example)
PCRMCODE.ZIP 46,391 bytes 11/06/95 (PCRAMMET source code)
PCRAMTD.ZIP 57,123 bytes 11/06/95 (PCRAMMET User's Guide) --------------------------
This is a utility program that converts unformatted (binary) meteorological data files generated by the RAMMET, PCRAMMET, or MPRM preprocessor programs to the default ASCII format for applications that do not involve dry deposition.
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BINTOASC.EXE 46,848 bytes 03/02/92 (BINTOASC.EXE) --------------------------
WRPLOT
WRPLOT is an interactive program to generate wind rose statistics and plots for user-specified date and time ranges. Wind roses are useful to define the dominant transport direction of the winds for a location.
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WRPLOT.ZIP 1,087,308 bytes 02/10/93 (Wind Rose Plotting Program) --------------------------
STAR
The STAR program summarizes National Weather Services (NWS) meteorological data, by generating joint frequencies of 6 windspeeds, 16 wind directions and 6 stability categories for the station and time period desired.
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STAR.ZIP 215,700 bytes 02/11/94 (STAR Program, Test Files) --------------------------
WINDROSE
Click the filename (highlighted in blue) to download the file.
WINDROSE.ZIP 284,722 bytes 10/24/95 (WINDROSE Program, Test Files)
| Modeling Guidance |
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This guideline is the regulatory document that recommends air quality modeling techniques that should be applied to different set of conditions. This document is also referred to as "Appendix W of CFR Part 51" (where CFR stands for Code of Federal Regulations).
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GAQM.ZIP 187,616 bytes 09/08/93 (GAQM with Supplements A & B)
SUPPB.ZIP 103,299 bytes 07/27/93 (Supplement B to GAQM)
GAQMCORR.ZIP 5,125 bytes 09/10/93 (Table 5-1 correction for GAQM)
FRNOTICE.ZIP 38,912 bytes 08/16/95 (FR Notice for Supplement B)
RESPONSE.ZIP 56,783 bytes 08/16/95 (Response to Public Comments, 5th Conf.)
SUPBINFO.TXT 5,075 bytes 07/29/93 (Supplement B Information File) --------------------------
Supplement C to GAQM
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SUPPC.ZIP 44,658 bytes 08/16/95 (GAQM Supplement C)
SUPCINFO.TXT 7,505 bytes 09/18/95 (Information on Supplement C) --------------------------
Screening Procedures for Estimating The Air Quality Impact of Stationary Sources
This document presents current EPA guidance on the use of screening procedures to estimate the air quality impact of stationary sources.
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SCR2DOC.ZIP 740,648 bytes 08/23/93 (Screening Procedures for Estimating The Air Quality Impact of Stationary Sources, Revised)
SCR3UPD.ZIP 15,996 bytes 09/14/95 ("Screening Procedures Document" Update)