NR 417.06(2) (2) Noncondensibles from digesters and multiple-effect evaporators shall be treated to reduce the emission of TRS equal to the reduction achieved by thermal oxidation in a lime kiln.

NR 417.06 History History: Renum. from NR 154.18 (2), Register, September, 1986, No. 369, eff. 10-1-86; am. (intro.) and (1), Register, May, 1992, No. 437, eff. 6-1-92; am. (1) and (2), r. (3), Register, December, 1995, No. 480, eff. 1-1-96.

NR 417.07 NR 417.07 Statewide sulfur dioxide emission limitations.

NR 417.07(1) (1) Applicability. This section applies to any direct source of sulfur dioxide, with the following exceptions:

NR 417.07(1)(a) (a) Any direct source which is subject to emission limitations specified in ch. NR 418.

NR 417.07(1)(b) (b) Any direct source which is subject to an emission limitation for sulfur dioxide, imposed by statute, rule, permit, order or plan approval, which is more restrictive than an emission limitation under sub. (2) or (3).

NR 417.07(2) (2) Emission limits for existing sources. Except as provided under sub. (5) or (8), no person may cause, allow or permit sulfur dioxide to be emitted to the ambient air from any direct source constructed on or before February 1, 1985, in amounts greater than those specified in this subsection.

NR 417.07(2)(a) (a) All steam generating units and other fuel burning equipment firing solid fossil fuel, alone or in combination with fuel burning equipment firing other fuels, at a facility which has a total heat input capacity on solid fossil fuel of greater than or equal to 250 million Btu per hour, may not emit from any stack more than 3.2 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(2)(b) (b) Any steam generating unit or other fuel burning equipment firing solid fossil fuel at a facility which has a total heat input capacity on solid fossil fuel of less than 250 million Btu per hour may not emit from any stack more than 5.5 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(2)(c) (c) Any steam generating unit or other fuel burning equipment firing residual fuel oil at a facility which has a total heat input capacity on residual fuel oil of greater than or equal to 250 million Btu per hour may not emit from any stack more than 1.5 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(2)(d) (d) Any steam generating unit or other fuel burning equipment firing residual fuel oil at a facility which has a total heat input capacity on residual fuel oil of less than 250 million Btu per hour may not emit from any stack more than 3.0 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(2)(e) (e) Any kraft mill producing pulp may not emit more than 10.0 pounds of sulfur dioxide per ton of air dried unbleached pulp from all process sources at the kraft mill. Process sources do not include equipment which derives more than 50% of its annual heat input from solid fossil fuel, residual fuel oil, wood or wood waste.

NR 417.07(2)(f) (f) Any sulfite mill producing pulp may not emit more than 20.0 pounds of sulfur dioxide per ton of air dried unbleached pulp from all process sources at the sulfite mill. Process sources do not include equipment which derives more than 50% of its annual heat input from solid fossil fuel, residual fuel oil, wood or wood waste.

NR 417.07(2)(g) (g) Any petroleum refinery shall comply with the following emission limitations:

NR 417.07(2)(g)1. 1. The sulfur dioxide emissions from any process heater firing residual fuel oil may not exceed 0.80 pounds of sulfur dioxide per million Btu heat input from the process heater.

NR 417.07(2)(g)2. 2. The sulfur dioxide emissions from any stack serving any fuel burning equipment firing residual fuel oil may not exceed 0.80 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(2)(g)3. 3. The sulfur dioxide emissions from any Claus sulfur recovery plant may not exceed 6,743 pounds of sulfur dioxide in any 24-hour period or 843 pounds of sulfur dioxide in any 3-hour period.

NR 417.07(2)(g)4. 4. The sulfur dioxide emissions from all other process units may not exceed 1,035 pounds of sulfur dioxide in any 1-hour period.

NR 417.07(3) (3) Emission limits for new sources. No person may cause, allow or permit sulfur dioxide to be emitted to the ambient air from any direct source constructed after February 1, 1985 in amounts greater than those specified in this subsection.

NR 417.07(3)(a) (a) Any steam generating unit or other fuel burning equipment firing solid fossil fuel may not emit from any stack more than 3.2 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(3)(b) (b) Any steam generating unit or other fuel burning equipment firing residual fuel oil may not emit from any stack more than 1.5 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(3)(c) (c) Any kraft mill producing pulp may not emit more than 10.0 pounds of sulfur dioxide per ton of air dried unbleached pulp from all process sources at the kraft mill. Process sources do not include equipment which derives more than 50% of its annual heat input from solid fossil fuel, residual fuel oil, wood or wood waste.

NR 417.07(3)(d) (d) Any sulfite mill producing pulp may not emit more than 20.0 pounds of sulfur dioxide per ton of air dried unbleached pulp from all process sources at the sulfite mill. Process sources do not include equipment which derives more than 50% of its annual heat input from solid fossil fuel, residual fuel oil, wood or wood waste.

NR 417.07(3)(e) (e) Any petroleum refinery shall comply with the following emission limitations:

NR 417.07(3)(e)1. 1. The sulfur dioxide emissions from any process heater firing residual fuel oil may not exceed 1.5 pounds of sulfur dioxide per million Btu heat input from the process heater.

NR 417.07(3)(e)2. 2. The sulfur dioxide emissions from any stack serving any fuel burning equipment firing residual fuel oil may not exceed 1.5 pounds of sulfur dioxide per million Btu heat input.

NR 417.07(3)(e)3. 3. The sulfur dioxide emissions from any Claus sulfur recovery plant may not exceed:

NR 417.07(3)(e)3.a. a. 0.025% by volume of sulfur dioxide at zero percent oxygen on a dry basis, if emissions are controlled by an oxidation control system or a reduction control system followed by incineration.

NR 417.07(3)(e)3.b. b. 0.030% by volume of reduced sulfur compounds and 0.0010% by volume of hydrogen sulfide calculated as sulfur dioxide at zero percent oxygen on a dry basis, if emissions are controlled by a reduction control system not followed by incineration.