Monitoring Data Checking Software (MDC) v4.2.56 is available from US EPA. This version supersedes MDC v4.2.55, posted in June, 2006. The new version fixes the MDC Hourly functionality that evaluates the QA status of Appendix D Fuel Flowmeter Systems and Appendix E NOx emission rate systems. Starting with the 4th quarter of 2006, US EPA plans to use the MDC Hourly functionality in Version 4.2.56 to perform quarterly electronic audits of Appendix D and E units. Units using Appendix D and E monitoring methods should download and review the materials provided in the Electronic Audits of Appendix D and E Data section.
The new version of MDC also includes other minor fixes not related to Appendix D or E, as detailed in the Release Notes (pdf, 1pp., 11kB).