Rule 3745-18-90 | Washington county emission limits.
(A) No owner or operator of any coal-fired steam generating unit in Washington county shall cause or permit the emission of sulfur dioxide from any source to exceed a maximum of 4.5 pounds of sulfur dioxide per MM Btu actual heat input.
(B) The "Ferroglobe USA Metallurgical, Inc." (OEPA premise number 0684000105) or any subsequent owner or operator of the "Ferroglobe USA Metallurgical, Inc. County Route 32, Waterford, Ohio" shall not cause or permit the emission of sulfur dioxide from "No. 1 shop baghouse" (associated OEPA source numbers P902, P903, and P904) or from "No. 2 shop baghouse" (associated OEPA source numbers P907 and P908) to exceed the corresponding pounds per hour rates specified in any of the twenty-five sulfur dioxide emission limit sets indicated below. Where a calculated rate for one baghouse falls in-between the emission limit sets shown in the following chart, the applicable emission limit for the other baghouse will be the more stringent of the two corresponding emission limits for that baghouse:
| Sulfur dioxide emission limit sets | Calendar day (24-hour average) emission limits | |
| "No. 1 shop baghouse" (pounds per hour) | "No. 2 shop baghouse" (pounds per hour) | |
| 1 | 195.3 | 0.0 |
| 2 | 190.6 | 55.8 |
| 3 | 186.0 | 74.4 |
| 4 | 181.3 | 102.3 |
| 5 | 176.7 | 116.2 |
| 6 | 172.0 | 130.2 |
| 7 | 167.4 | 144.1 |
| 8 | 162.7 | 158.1 |
| 9 | 158.1 | 167.4 |
| 10 | 153.4 | 176.7 |
| 11 | 148.8 | 186.0 |
| 12 | 144.1 | 190.6 |
| 13 | 139.5 | 195.3 |
| 14 | 134.8 | 199.9 |
| 15 | 130.2 | 204.6 |
| 16 | 125.5 | 213.9 |
| 17 | 120.9 | 218.5 |
| 18 | 116.2 | 223.2 |
| 19 | 111.6 | 223.2 |
| 20 | 106.9 | 227.8 |
| 21 | 88.3 | 232.5 |
| 22 | 74.4 | 237.1 |
| 23 | 60.4 | 241.8 |
| 24 | 41.8 | 246.4 |
| 25 | 0.0 | 251.1 |
[Comment: To comply with an emission limit set, the emissions from each baghouse cannot exceed the corresponding pounds per hour rate contained on a particular row in the table. For example, to comply with the sulfur dioxide emission limit set number 10, the emission from baghouse one shall not exceed 153.4 pounds per hour, and the emission from baghouse two shall not exceed 176.7 pounds per hour.]
[Comment: This paragraph identifies emission sources currently associated with each baghouse. Regardless of the associated emission sources, total sulfur dioxide emissions from each baghouse are subject to the sulfur dioxide emissions limit sets listed in the chart.]
Last updated October 26, 2026 at 8:40 AM
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