Ind. Admin. Code tit. 326, r. 7-4.1-8 – Indiana Harbor Coke Company sulfur dioxide emission limitations

Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11

Sec. 8. (a) Indiana Harbor Coke Company (IHCC), Source Identification Number 00382, shall comply with the sulfur dioxide emission limits in pounds per ton of dry coal, pounds per hour, and other requirements as follows:

Emissions Unit Description	Emission Limit lbs/ton	Emission Limit lbs/hour
(1) IHCC Coal Carbonization Charging	0.0068	1.57 total
(2) IHCC Coal Carbonization Pushing	0.0084	1.96
(3) IHCC Coal Carbonization Quenching	0.0053	1.232 total
(4) IHCC Coal Carbonization Thaw Shed	0.0006 lbs/1,000 cubic feet natural gas	0.015
(5) IHCC Vent Stacks (16 total) in combination with Cokenergy's heat recovery coke carbonization waste gas stack identified as Stack ID 201		1,656 total for a 24 hour average

(b) The coke ovens must recycle the gases emitted during the coking process in accordance with the following:

(1) The recycled gases must be the only fuel source used for the ovens during normal operations.
(2) The gases must not be routed directly to the atmosphere unless they first pass through the common tunnel afterburner.
(3) A maximum of nineteen percent (19%) of the coke oven waste gases leaving the common tunnel may be vented to the atmosphere on a twenty-four (24) hour basis.

(c) Except under subsection (d), beginning on January 1, 2020, Indiana Harbor Coke Company in combination with Cokenergy LLC may vent a maximum of thirteen percent (13%) of the coke oven waste gases leaving the common tunnel to the atmosphere through the bypass vent stacks, as determined on an annual basis.

(d) Beginning on January 1, 2020, if Cokenergy LLC undertakes HRSG retubing, as defined in section 7(e) of this rule, then the following apply:

(1) Indiana Harbor Coke Company in combination with Cokenergy LLC may vent a maximum of fourteen percent (14%) of the coke oven waste gases leaving the common tunnel to the atmosphere through the bypass vent stacks, as determined:
1. (A) on an annual basis; and
2. (B) in any calendar year that Cokenergy LLC undertakes HRSG retubing.
(2) The bypass venting percentage resulting from HRSG retubing must account for at least three and one-quarter percent (3.25%) of the annual bypass venting.
(3) Bypass venting resulting from tube leaks, inspections, routine cleaning or maintenance, or unplanned HRSG outages may not be included in calculating the bypass venting percentage resulting from HRSG retubing.

(Air Pollution Control Division; 326 IAC 7-4.1-8; filed May 25, 2005, 10:50 a.m.: 28 IR 2957; filed Apr 24, 2020, 4:26 p.m.: 20200429-IR-326190388FRA, eff Apr 24, 2020, see Executive Order 20-15, posted at 20200422-IR-GOV200234EOA; readopted filed Oct 18, 2024, 2:09 p.m.: 20241113-IR-326230809RFA)