1. Regulations
  2. title 40
  3. chapter I-i30
  4. part 421
  5. subpart I
  6. § 421.92

View all text of Subpart I [§ 421.90 - § 421.97]

§ 421.92 - 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 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):

Subpart I—Metallurgical Acid Plant

Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds of 100% sulfuric acid capacity Cadmium0.1800.090 Copper5.0002.000 Lead1.8000.790 Zinc3.6000.900 Fluoride 1212.800121.000 Molybdenum 140.18020.790 Total suspended solids304.000152.000 pH22

1 For Molybdenum Acid Plants Only.

2 Within the range of 6.0 to 9.0 at all times.

[50 FR 38342, Sept. 20, 1985; 50 FR 52776, Dec. 26, 1985]

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.

SOURCE: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.

CITE AS: 40 CFR 421.92