Revisions to Test Method for Determining Stack Gas Velocity Taking Into Account Velocity Decay Near the Stack Walls

---
identifier: "/us/fr/Z9-20395"
source: "fr"
legal_status: "authoritative_unofficial"
title: "Revisions to Test Method for Determining Stack Gas Velocity Taking Into Account Velocity Decay Near the Stack Walls"
title_number: 0
title_name: "Federal Register"
section_number: "Z9-20395"
section_name: "Revisions to Test Method for Determining Stack Gas Velocity Taking Into Account Velocity Decay Near the Stack Walls"
positive_law: false
currency: "2009-09-09"
last_updated: "2009-09-09"
format_version: "1.1.0"
generator: "[email protected]"
agency: "Environmental Protection Agency"
document_number: "Z9-20395"
document_type: "proposed_rule"
publication_date: "2009-09-09"
agencies:
  - "Environmental Protection Agency"
cfr_references:
  - "40 CFR Part 60"
rin: "2060-AP08"
fr_citation: "74 FR 46401"
fr_volume: 74
docket_ids:
  - "EPA-HQ-OAR-2008-0697"
  - "FRL-8948-9"
---


#  Revisions to Test Method for Determining Stack Gas Velocity Taking Into Account Velocity Decay Near the Stack Walls

**Correction**

In proposed rule document E9-20395 beginning on page 42819 in the issue of Tuesday, August 25, 2009 make the following correction:

**Appendix A-2 to Part 60 [Corrected]**

On page 42819, in Appendix A-2 to Part 60, Equation 2H-1 is reprinted correctly to read as set forth below: