40 CFR § 420.34 - New source performance standards (NSPS).
---
identifier: "/us/cfr/t40/s420.34"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 420.34 - New source performance standards (NSPS)."
title_number: 40
title_name: "Protection of Environment"
section_number: "420.34"
section_name: "New source performance standards (NSPS)."
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"
---
# 420.34 New source performance standards (NSPS).
The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.
(a) *Iron blast furnace.*
Subpart C
| | | |
| --- | --- | --- |
| | Kg/kkg (pounds per 1,000 lb) of products | |
| TSS | 0.0117 | 0.00438 |
| O&G | 0.00292 | |
| Ammonia-N | 0.00876 | 0.00292 |
| Cyanide | 0.000584 | 0.000292 |
| Phenols (4AAP) | 0.0000584 | 0.0000292 |
| TRC | 0.000146 | |
| Lead | 0.000263 | 0.0000876 |
| Zinc | 0.000394 | 0.000131 |
| pH | () | () |
| The standards for TRC shall be applicable only when chlorination of ironmaking wastewaters is practiced. | | |
| Within the range of 6.0 to 9.0. | | |
(b) [Reserved]
[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21030, May 17, 1984; 67 FR 64266, Oct. 17, 2002]