40 CFR § 421.132 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
---
identifier: "/us/cfr/t40/s421.132"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 421.132 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available."
title_number: 40
title_name: "Protection of Environment"
section_number: "421.132"
section_name: "Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "421"
part_name: "NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 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) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4."
regulatory_source: "49 FR 8790, Mar. 8, 1984, unless otherwise noted."
cfr_part: "421"
---
# 421.132 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:
(a) Subpart M—Battery Cracking
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead scrap produced | |
| Antimony | 1.932 | .862 |
| Arsenic | 1.407 | .579 |
| Lead | .283 | .135 |
| Zinc | .983 | .411 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | 27.600 | 13.130 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(b) Subpart M—Blast, Reverberatory, or Rotary Furnace Wet Air Pollution Control
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead produced from smelting | |
| Antimony | 7.491 | 3.341 |
| Arsenic | 5.455 | 2.245 |
| Lead | 1.096 | .522 |
| Zinc | 3.811 | 1.592 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | 107.000 | 50.900 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(c) Subpart M—Kettle Wet Air Pollution Control
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead produced from refining | |
| Antimony | .129 | .058 |
| Arsenic | .094 | .039 |
| Lead | .019 | .009 |
| Zinc | .066 | .027 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | 1.845 | .878 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(d) Subpart M—Lead Paste Desulfurization
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead processed through desulfurization | |
| Antimony | .000 | .000 |
| Arsenic | .000 | .000 |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | .000 | .000 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(e) Subpart M—Casting Contact Cooling
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead cast | |
| Antimony | .634 | .283 |
| Arsenic | .462 | .190 |
| Lead | .093 | .044 |
| Zinc | .323 | .135 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | 9.061 | 4.310 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(f) Subpart M—Truck Wash.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead produced from smelting | |
| Antimony | .060 | .027 |
| Arsenic | .044 | .018 |
| Lead | .009 | .004 |
| Zinc | .031 | .013 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | .861 | .410 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(g) Subpart M—Facility Washdown
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead produced from smelting | |
| Antimony | .000 | .000 |
| Arsenic | .000 | .000 |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | .000 | .000 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(h) Subpart M—Battery Case Classification.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead scrap produced | |
| Antimony | .000 | .000 |
| Arsenic | .000 | .000 |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | .000 | .000 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(i) Subpart M—Employee Handwash.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead produced from smelting | |
| Antimony | .077 | .035 |
| Arsenic | .056 | .023 |
| Lead | .011 | .005 |
| Zinc | .039 | .016 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | 1.107 | .527 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(j) Subpart M—Employee Respirator Wash.
BPT Effulent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead produced from smelting | |
| Antimony | .126 | .056 |
| Arsenic | .092 | .038 |
| Lead | .018 | .009 |
| Zinc | .064 | .027 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | 1.804 | .858 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(k) Subpart M—Laundering of Uniforms.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of lead produced from smelting | |
| Antimony | .367 | .164 |
| Arsenic | .268 | .110 |
| Lead | .054 | .026 |
| Zinc | .187 | .078 |
| Ammonia (as N) | .000 | .000 |
| Total suspended solids | 5.248 | 2.496 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
[49 FR 8826, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984]