Site Feedback

Title 40

Displaying title 40, up to date as of 6/11/2026. Title 40 was last amended 6/11/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

§ 63.7296 What emission limitations must I meet for battery stacks?

You must not discharge to the atmosphere any emissions from any battery stack at a new or existing by-product coke oven battery that exhibit an opacity greater than the applicable limits in paragraphs (a) and (b) of this section and emissions greater than the applicable limits in paragraphs (c) through (f) of this section.

(a) Daily average of 15 percent opacity for a battery on a normal coking cycle.

(b) Daily average of 20 percent opacity for a battery on batterywide extended coking.

(c) Emissions of particulate matter from a new by-product coke oven battery stack that exceeds 0.013 gr/dscf at 10 percent oxygen or existing by-product coke oven battery stack that exceeds 0.13 gr/dscf at 10 percent oxygen.

(d) Emissions of mercury from a new by-product coke oven battery stack that exceeds 7.1E-06 lb/ton coke or existing by-product coke oven battery stack that exceeds 4.5E-05 lb/ton coke.

(e) Emissions of total acid gases from a new by-product coke oven battery stack that exceeds 0.013 lb/ton coke or existing by-product coke oven battery stack that exceeds 0.16 lb/ton coke.

(f) Emissions of hydrogen cyanide from a new by-product coke oven battery stack that exceeds 7.4E-04 lb/ton coke or existing by-product coke oven battery stack that exceeds 0.032 lb/ton coke.

[89 FR 55743, July 5, 2024]