Updates to the CMM Data Set
The CMM Revision 27 utilizes chemical concentration limit data from PAC Revision 27. CMM Revision 27 includes the most recent set of updated HCNs and PACs for all of the 3,300+ chemicals in the Revision 27 data set.
General Update Information
A new revision of the CMM data set is generally released every year and incorporates the addition of new chemicals, updates to HCN values, and major revisions to the PAC data set. Minor revisions to the CMM Workbook (as indicated by the addition of a letter after the revision number) may be released on occasion to correct a limited number of errors or incorporate minor revisions to the PAC data set. CMM updates will generally be synchronized with revisions to the PAC data set.
Users of the CMM may wish to periodically review past CMM analyses for their key facilities. In many cases, updated information will reduce over-conservatism in previous analyses. However, in some cases updated information may warrant more stringent emergency preparedness actions.