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EPA's anticipated proposed revisions to Part 75 were published in the Federal Register on June 13, 2001. The changes, which are intended to steamline the rule while providing technical corrections and regulatory flexibility, effect a considerable number of provisions within the rule that will impact both Acid Rain and NO_X Budget Program sources.

The proposed revisions include:

• Changes intended to streamlining the rule and eliminate outdated provisions
• Revisions to the natural gas definitions and related testing requirements
• Changes to the definitions of unit and stack operating hours for QA purposes
• Initial certification application deadlines changes
• Modifications effecting what happens when a unit loses peaking, gas-fired, or LME status
• Significant revisions to the missing data substitution procedures
• Changes intended to address units that produce electrical or thermal output
• Revised maximum potential moisture provisions
• Method of determination codes changes
• Significant changes to the low mass emissions (LME) provisions
• Changes for CEMS span and range evaluations
• Modifications of the procedures to determine NO_X MPC, MEC, span, and range values
• Changes to the 7-day calibration error test for peaking units
• Tightened calibration standards for units with span values less than 50 ppm
• Changes to the flow-to-load ratio test
• Modifications to the data analysis time period for single-load flow RATA claims
• Changes to the way for monitoring plan information is updated/reported
• Revisions impacting reporting and testing requirements for emergency fuel use
• Changes to the frequency of retesting of Appendix E units

A copy of the federal register version of the proposed rule revisions and a redline/strikeout version of 40 CFR parts 72 and 75 incorporating the proposed changes are available from our FTP Library. If you wish to submit comments to the EPA on the proposed revisions, comments must be received on or before July 30, 2001. Comments must be mailed (in duplicate) to: EPA Air Docket (6102), Attention: Docket No. A-2000-33, Room M-1500, Waterside Mall, 401 M Street, SW., Washington, DC 20460. If requested, a public hearing on the proposed revisions will be held at the Environmental Protection Agency, 401 M Street, SW., Washington, DC 20460, in the Education Center Auditorium on June 27, 2001.

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Last Revised: June 14, 2001