326 IAC 7-4.1-7 Cokenergy LLC sulfur dioxide emission limitations

Sec. 7. (a) Cokenergy LLC, Source Identification Number 00383, shall comply with the sulfur dioxide emission limit in pounds per hour for the heat recovery coke carbonization waste gas stack, identified as Stack ID 201, combined with the sixteen (16) vents from the Indiana Harbor Coke Company of a twenty-four (24) hour average emission rate of one thousand six hundred fifty-six (1,656) pounds per hour. (b) Cokenergy LLC shall install, operate, and maintain a permanent flow monitor to continuously measure the flow rate in Stack ID 201. (c) Except under subsection (d), beginning on January 1, 2020, Cokenergy LLC in combination with Indiana Harbor Coke Company 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 heat recovery steam generator (HRSG) retubing, as defined in subsection (e), then the following apply: (1) Cokenergy LLC in combination with Indiana Harbor Coke Company 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: (A) on an annual basis; and (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. (e) For the purposes of this section and section 8 of this rule, "heat recovery steam generator retubing" or "HRSG retubing" means replacement of: (1) waterwalls, evaporator tubes, economizer tubes, or superheater module pendants within the heat recovery steam generator; and (2) exterior casing, insulation, and refractory, as needed.