View Rule
View EO 12866 Meetings | Printer-Friendly Version Download RIN Data in XML |
EPA/OAR | RIN: 2060-AV63 | Publication ID: Fall 2022 |
Title: Revision to 40 CFR Part 50, Appendix D, "Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method)" | |
Abstract:
The EPA is taking this action to revise the current ozone absorption cross-section stated in appendix D to the recently revised international consensus-based cross-section value of 1.1329x10−17 cm2 molecule−1 or 304.39 atm-1 cm-1 with an uncertainty of 0.94 atm-1 cm-1, which is 1.2% lower than the current value of 308 atm-1 cm-1. The cross-section value serves as the basis for calculating and calibrating ozone concentrations using the ultraviolet (UV) photometric method of analysis. The EPA is proposing to a change to the current absorption cross-section to the revised consensus-based value because it reflects an advancement in science and measurement technology that will improve the bias and reduce the uncertainty in this value. |
|
Agency: Environmental Protection Agency(EPA) | Priority: Substantive, Nonsignificant |
RIN Status: Previously published in the Unified Agenda | Agenda Stage of Rulemaking: Proposed Rule Stage |
Major: No | Unfunded Mandates: No |
CFR Citation: 40 CFR 50 | |
Legal Authority: 42 U.S.C. 7401 et seq. |
Legal Deadline:
None |
|||||||||
Timetable:
|
Regulatory Flexibility Analysis Required: No | Government Levels Affected: None |
Small Entities Affected: No | Federalism: No |
Included in the Regulatory Plan: No | |
RIN Data Printed in the FR: No | |
Agency Contact: Joann Rice Environmental Protection Agency Office of Air and Radiation C304-06, Research Triangle Park, NC 27711 Phone:919 541-3372 Fax:919 541-1903 Email: Rice.Joann@epamail.epa.gov |