143  Conflicting Options: UNFORM with Dry or Wet Deposition.  The dry and wet deposition algorithms of the Short Term model require additional meteorological variables that are not included in the unformatted data file generated by the PCRAMMET or MPRM meteorological processors.  The user must use PCRAMMET or MPRM to generate an ASCII meteorological data file with the necessary variables.


144  Conflicting Options: NOSMPL with FLAT Terrain.  The NOSMPL option specifies that only the COMPLEX1 algorithms will be used, whereas the FLAT option specifies that flat terrain will be used (i.e., all receptor elevations are at stack base elevation).  Since the COMPLEX1 algorithms apply only to receptor elevations that are above the release height, these two options are in conflict.


145  Conflicting Options: MULTYEAR and Re‑Start Option.  The multiple year option for processing PM‑10 values makes use of the re‑start routines in the model with some slight changes to handle the period averages from year to year. As a result, the MULTYEAR keyword cannot be specified with either the SAVEFILE or INITFILE keywords.


150  Conflicting Options: MULTYEAR for Wrong Pollutant.  The multiple year option is provided specifically for the processing of PM‑10 values to obtain the "high‑sixth‑high in five years" design value.  Its treatment of the high short term values for multiple year periods is not consistent with existing air quality standards for other pollutants.  To use the MULTYEAR option, the user must specify a pollutant type (on the CO POLLUTID card) of PM‑10, PM10, or OTHER.


151  CO ELEVUNIT card is obsolescent: use RE ELEVUNIT card.  With the release of the ISC3 models, the CO ELEVUNIT card has been designated as obsolescent - it will still be processed as before by the model, but the user is encouraged to use the new RE ELEVUNIT card instead.  The RE ELEVUNIT card has the same effect as the original CO ELEVUNIT card.


152  ELEVUNIT card must be first for this pathway.  The ELEVUNIT card must be the first non-commented card after STARTING when used on the SO or RE pathway.  This requirement is made in order to simplify reviewing runstream files to determine the elevation units used for sources and receptors.


153  Cannot use CO ELEVUNIT card with ELEVUNIT card for the SO, RE or TG pathway.  With the release of the ISC3 models, the CO ELEVUNIT card has been designated as obsolescent - it will still be processed as before by the model if it is the only CO ELEVUNIT card encountered in the runstream.  This is to allow for compatibility of the model with old input files.  However, if any of the new ELEVUNIT cards (on the SO, RE or TG pathways) are used, then the CO ELEVUNIT card must be removed.




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