40 CFR § 420.83 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

---
identifier: "/us/cfr/t40/s420.83"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 420.83 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT)."
title_number: 40
title_name: "Protection of Environment"
section_number: "420.83"
section_name: "Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "420"
part_name: "IRON AND STEEL 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: "33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, and 1361."
regulatory_source: "47 FR 23284, May 27, 1982, unless otherwise noted."
cfr_part: "420"
---


# 420.83 Effluent limitations 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.

(a) *Salt bath descaling, oxidizing*—(1) *Batch, sheet and plate.*

Subpart H

|  |  |  |
| --- | --- | --- |
|  | Kg/kkg (pounds per 1,000 lb) of product |  |
| Chromium | 0.00292 | 0.00117 |
| Nickel | 0.00263 | 0.000876 |

(2) *Batch, rod and wire.*

Subpart H

|  |  |  |
| --- | --- | --- |
|  | Kg/kkg (pounds per 1,000 lb) of product |  |
| Chromium | 0.00175 | 0.000701 |
| Nickel | 0.00158 | 0.000526 |

(3) *Batch, pipe and tube.*

Subpart H

|  |  |  |
| --- | --- | --- |
|  | Kg/kkg (pounds per 1,000 lb) of product |  |
| Chromium | 0.00709 | 0.00284 |
| Nickel | 0.00638 | 0.00213 |

(4) *Continuous.*

Subpart H

|  |  |  |
| --- | --- | --- |
|  | Kg/kkg (pounds per 1,000 lb) of product |  |
| Chromium | 0.00138 | 0.000551 |
| Nickel | 0.00124 | 0.000413 |

(b) *Salt bath descaling, reducing*—(1) *Batch.*

Subpart H

|  |  |  |
| --- | --- | --- |
|  | Kg/kkg (pounds per 1,000 lb) of product |  |
| Cyanide | 0.00102 | 0.000339 |
| Chromium | 0.00136 | 0.000542 |
| Nickel | 0.00122 | 0.000407 |

(2) *Continuous.*

Subpart H

|  |  |  |
| --- | --- | --- |
|  | Kg/kkg (pounds per 1,000 lb) of product |  |
| Cyanide | 0.00569 | 0.00190 |
| Chromium | 0.00759 | 0.00304 |
| Nickel | 0.00683 | 0.00228 |