Readme for MMG.PDF  (EPA-454/R-99-005)

April 6, 2000

The February 2000 PDF document did not correctly display several of
the Greek characters in equation 6.2.4.  The problem was corrected by
reprocessing the original Wordperfect 8 document using PDF
Distiller.  There were no substantive changes to the document.


February 1, 2000

This document updates the June 1987 EPA document, "On-Site
Meteorological Program Guidance for Regulatory Modeling Applications",
EPA-450/4-87-013.  The most significant change is the replacement of
Section 9  with more comprehensive guidance on remote sensing and
conventional radiosonde technologies for use in upper-air meteorological
monitoring; previously this section provided guidance on the use of
sodar technology.   The other significant change is the addition to
Section 8 (Quality Assurance) of material covering data validation for
upper-air meteorological measurements.  These changes incorporate
guidance developed during a peer review workshop on upper-air meteorological
monitoring in July 1998.

Editorial changes include the deletion of the "on-site" qualifier from
the title and its selective replacement in the text with "site
specific"; this provides consistency with recent changes to the
Guideline on Air Quality Models (as published in Appendix W to 40 CFR
Part 51).  In addition, Section 6 has been updated to consolidate and 
provide necessary context for guidance in support of air quality
dispersion models which incorporate boundary layer scaling techniques.

This document provides guidance for the collection and processing of
meteorological data in support of regulatory air quality modeling
applications; e.g., as specified in the Guideline on Air Quality
Models.   It is intended to guide State Air Quality Agencies and the EPA
Regional Offices in reviewing/approving meteorological monitoring
conducted in support of such applications.  To facilitate this process,
recommendations applicable to regulatory modeling applications are
summarized at the end of each section.




                                                          02/01/2000