---
kind: "section"
citation: "40 C.F.R. § 420.77"
title: "40"
number: "420.77"
heading: "Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT)."
url: "https://uscodex.org/cfr/40/420.77"
---

# §420.77. Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).


Except as provided in [40 CFR 125.30 through 125.32](/cfr/40/125.30..125.32.md), 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 technology.

- (a) **Primary mills, carbon and specialty—**
  - (1) **Without scarfing.**
  - (2) **With scarfing.**
- (b) **Section mills—**
  - (1) **Carbon.**
  - (2) **Specialty.**
- (c) **Flat mills—**
  - (1) **Hot strip and sheet mills, carbon and specialty.**
  - (2) **Carbon plate mills.**
  - (3) **Specialty plate mills.**
- (d) **Pipe and tube mills, carbon and specialty.**

## Notes

### Amendments

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982]

### Authority

Authority: 33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, and 1361.

### Source

Source: 47 FR 23284, May 27, 1982, unless otherwise noted.

### Amendments

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982]