US EPA Clean Air Markets issued Monitor Data Checking (MDC) Software v4.2.55, revised as of June 14, 2006. This version is being released to fix the MDC Hourly functionality that evaluates the QA status of Appendix D Fuel Flowmeter Systems and Appendix E NOx emission rate systems. US EPA plans to use the MDC Hourly functionality in v4.2.55 to perform quarterly electronic audits of Appendix D and E units, starting with the 2nd quarter of 2006 EDR submissions.
In addition, MDC CAMD Export Files data are refreshed as of June 10, 2006.