NR 463.23(1)(a)6.6. For each pouring area or pouring station at a new iron and steel foundry, as described in s. NR 463.21 (3) (d), you may not discharge emissions through a conveyance to the atmosphere that exceed either the limit for PM in subd. 6. a. or, alternatively, the limit for total metal HAP in subd. 6. b.: NR 463.23(1)(a)7.7. For each building or structure housing any emissions source at the iron and steel foundry, you may not discharge any fugitive emissions to the atmosphere that exhibit opacity greater than 20% averaged over 6 minutes except for one 6-minute average per hour that does not exceed 27% opacity. NR 463.23(1)(a)8.8. For each cupola metal melting furnace at a new or existing iron and steel foundry, you may not discharge emissions of volatile organic hazardous air pollutants (VOHAP) through a conveyance to the atmosphere that exceed 20 parts per million by volume (ppmv) corrected to 10% oxygen. NR 463.23(1)(a)9.9. As an alternative to the work practice standard in sub. (2) (e) for a scrap preheater at an existing iron and steel foundry or in sub. (2) (f) for a scrap preheater at a new iron and steel foundry, as described in s. NR 463.21 (3) (d), you may not discharge emissions of VOHAP through a conveyance to the atmosphere that exceed 20 ppmv. NR 463.23(1)(a)10.10. For one or more automated conveyor and pallet cooling lines that use a sand mold system, or one or more automated shakeout lines that use a sand mold system, at a new iron and steel foundry, as described in s. NR 463.21 (3) (d), you may not discharge emissions of VOHAP through a conveyance to the atmosphere that exceed a flow-weighted average of 20 ppmv. NR 463.23(1)(a)11.11. For each triethylamine (TEA) cold box mold or core making line at a new or existing iron and steel foundry, you shall meet either the emission limit in subd. 11. a. or the emission standard in subd. 11. b.: NR 463.23(1)(a)11.a.a. You may not discharge emissions of TEA through a conveyance to the atmosphere that exceed 1 ppmv, as determined when scrubbing with fresh acid solution. NR 463.23(1)(a)11.b.b. You shall reduce emissions of TEA from each TEA cold box mold or core making line by at least 99%, as determined when scrubbing with fresh acid solution. NR 463.23(1)(b)(b) You shall meet each of the following operating limits that applies to you: NR 463.23(1)(b)1.1. You shall install, operate and maintain a capture and collection system for all emission sources subject to an emission limit or standard for VOHAP or TEA in par. (a) 8. to 11. in accordance with both of the following: NR 463.23(1)(b)1.a.a. Each capture and collection system shall meet accepted engineering standards, such as those published by the American Conference of Governmental Industrial Hygienists. NR 463.23 NoteNote: Publications of the American Conference of Governmental Industrial Hygienists may be obtained at:
NR 463.23 NoteAmerican Conference of Governmental Industrial Hygienists
1330 Kemper Meadow Drive
Cincinnati, Ohio 45240
(513) 742-2020
mail@acgih.org
www.acgih.org NR 463.23(1)(b)1.b.b. You shall operate each capture system at or above the lowest value or settings established as operating limits in your operation and maintenance plan. NR 463.23(1)(b)2.2. You shall operate each wet scrubber applied to emissions from a metal melting furnace, scrap preheater, pouring area or pouring station subject to an emission limit for PM or total metal HAP in par. (a) 1. to 6. to insure that the 3-hour average pressure drop and scrubber water flow rate does not fall below the minimum levels established during the initial or subsequent performance test. NR 463.23(1)(b)3.3. You shall operate each combustion device applied to emissions from a cupola metal melting furnace subject to the emission limit for VOHAP in par. (a) 8. to insure that the 15-minute average combustion zone temperature does not fall below 1,300ºF. Periods when the cupola is off blast and for 15 minutes after going on blast from an off blast condition are not included in the 15-minute average. NR 463.23(1)(b)4.4. You shall operate each combustion device applied to emissions from a scrap preheater subject to the emission limit for VOHAP in par. (a) 9. or from a TEA cold box mold or core making line subject to the emission limit for TEA in par. (a) 11. to insure that the 3-hour average combustion zone temperature does not fall below the minimum level established during the initial or subsequent performance test. NR 463.23(1)(b)5.5. You shall operate each wet acid scrubber applied to emissions from a TEA cold box mold or core making line subject to the emission limit for TEA in par. (a) 11. to insure both of the following: NR 463.23(1)(b)5.a.a. The 3-hour average scrubbing liquid flow rate does not fall below the minimum level established during the initial or subsequent performance test. NR 463.23(1)(b)5.b.b. The 3-hour average pH of the scrubber blowdown, as measured by a continuous parameter monitoring system (CPMS), does not exceed 4.5 or the pH of the scrubber blowdown, as measured once every 8 hours during process operations, does not exceed 4.5. NR 463.23(1)(c)(c) If you use a control device other than a baghouse, wet scrubber, wet acid scrubber or combustion device, you shall prepare and submit a monitoring plan. The monitoring plan is subject to approval by the department and shall contain all of the following: NR 463.23(1)(c)2.2. Test results collected in accordance with s. NR 463.25 (3) verifying the performance of the device for reducing emissions of PM, total metal HAP, VOHAP or TEA to the levels required by this subchapter. NR 463.23(1)(c)4.4. A list of appropriate operating parameters that will be monitored to maintain continuous compliance with the applicable emissions limitations. NR 463.23(1)(c)5.5. Operating parameter limits based on monitoring data collected during the performance test.