Regulations last checked for updates: May 01, 2025
Title 40 - Protection of Environment last revised: Nov 01, 2025
§ 410.20 - Applicability; description of the wool finishing subcategory.
The provisions of this subpart are applicable to process wastewater discharges resulting from the following types of textile mills: wool finishers, including carbonizing, fulling, dyeing, bleaching, rinsing, fireproofing, and other such similar processes.
§ 410.21 - Specialized definitions.
In addition to the definitions set forth in 40 CFR part 401 and § 410.01 of this part, the following definition applies to this subpart:
(a) The term fiber shall mean the dry wool and other fibers as received at the wool finsihing mill for processing into wool and blended products.
(b) [Reserved]
§ 410.22 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
(a) 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):
| Pollutant or pollutant property
| BPT limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (or pound per 1,000 lb) of fiber
|
| BOD5 | 22.4 | 11.2
|
| COD | 163.0 | 81.5
|
| TSS | 35.2 | 17.6
|
| Sulfide | 0.28 | 0.14
|
| Phenol | 0.14 | 0.07
|
| Total chromium | 0.14 | 0.07
|
| pH | (
1) | (
1)
|
(b) Additional allocations equal to the effluent limitations established in paragraph (a) of this section are allowed any existing point source subject to such effluent limitations that finishes wool or blended wool fabrics through “commission finishing” as defined in § 410.01.
§ 410.23 - Effluent limitation representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
(a) 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):
| Pollutant or pollutant property
| BAT limitation
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (or pounds per 1,000 lb) of fiber
|
| COD | 163.0 | 81.5
|
| Sulfide | 0.28 | 0.14
|
| Phenols | 0.14 | 0.07
|
| Total Chromium | 0.14 | 0.07 |
(b) Additional allocations equal to the effluent limitations established in paragraph (a) of this section are allowed any existing point source subject to such effluent limitations that finishes wool or blended wool fabrics through “commission finishing” as defined in § 410.01.
§ 410.24 - Pretreatment standards for existing sources (PSES).
Any existing source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.
§ 410.25 - New source performance standards (NSPS).
Any new source subject to this subpart must achieve the following new source performance standards (NSPS):
| Pollutant or pollutant property
| NSPS
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (pounds per 1,000 lb) of fiber
|
| BOD5 | 10.7 | 5.5
|
| COD | 113.8 | 73.3
|
| TSS | 32.3 | 14.4
|
| Sulfide | 0.28 | 0.14
|
| Phenols | 0.14 | 0.07
|
| Total Chromium | 0.14 | 0.07
|
| pH | (
1) | (
1)
|
§ 410.26 - Pretreatment standards for new sources (PSNS).
Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.
§ 410.27 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT). [Reserved]
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”);
33 U.S.C. 1311,
1314,
c,
e,
and, 1316 (b) and
c, 1317 (b) and
c,
and; 86 Stat. 186
source: 47 FR 38819, Sept. 2, 1982, unless otherwise noted.
cite as: 40 CFR 410.20