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Title 40

Displaying title 40, up to date as of 8/12/2026. Title 40 was last amended 8/07/2026.
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Subpart T—Sodium Sulfite Production Subcategory

§ 415.200 Applicability; description of the sodium sulfite production subcategory.

The provisions of this subpart are applicable to discharges resulting from the production of sodium sulfite by reacting sulfur dioxide with sodium carbonate.

§ 415.201 Specialized definitions.

For the purpose of this subpart:

(a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.

(b) The term product shall mean sodium sulfite.

§ 415.202 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):

Subpart T—Sodium Sulfite

Pollutant or pollutant property BPT limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (or pounds per 1,000 lb) of product
TSS 0.032 0.016
COD 3.4 1.7
pH (1) (1)
1 Within the range 6.0 to 9.0.

§ 415.203 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):

Subpart T—Sodium Sulfite

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (or pounds per/1,000 lb) of product
Chromium (T) 0.0020 0.00063
Zine (T) 0.0051 0.0015
COD 3.4 1.7

[49 FR 33420, Aug. 22, 1984]

§ 415.204 [Reserved]

§ 415.205 New source performance standards (NSPS).

Any new source subject to this subpart must achieve the following new source performance standards (NSPS):

Subpart T—Sodium Sulfite

Pollutant or pollutant property NSPS effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (or pounds per/1,000 lb) of product
TSS 0.032 0.016
Chromium (T) 0.0020 0.00063
Zinc (T) 0.0051 0.0015
COD 3.4 1.7
pH (1) (1)
1 Within the range 6.0 to 9.0.

[49 FR 33421, Aug. 22, 1984]

§ 415.206 Pretreatment standards for new sources (PSNS).

Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources (PSNS).

Subpart T—Sodium Sulfite

Pollutant or pollutant property PSNS effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Milligrams per liter (mg/l)
Chromium (total) 1.3 0.42
Zinc (total) 3.4 1.2
COD 1,260 630

In cases when POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as an alternate: The limitations on chromium (total), zinc (total), and COD are the same as specified in § 415.205.

[49 FR 33421, Aug. 22, 1984]

§ 415.207 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT).

Except as provided in 40 CFR 125.30 through 125.32 any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): The limitations for TSS and pH are the same as specified in § 415.202.

[49 FR 33421, Aug. 22, 1984]