1. Regulations
  2. title 40
  3. chapter I-i30
  4. part 421
  5. subpart V
  6. § 421.245

View all text of Subpart V [§ 421.240 - § 421.247]

§ 421.245 - Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in secondary nickel process wastewater introduced into a POTW must not exceed the following values:

(a) Slag reclaim tailings.

PSES for the Secondary Nickel Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of slag input to reclaim process Chromium (total)5.6532.313 Copper24.41012.850 Nickel24.67016.320

(b) Acid reclaim leaching filtrate.

PSES for the Secondary Nickel Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of acid reclaim nickel produced Chromium (total)2.1980.899 Copper9.4914.995 Nickel9.5906.344

(c) Acid reclaim leaching belt filter backwash

PSES for the Secondary Nickel Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of acid reclaim nickel produced Chromium (total)0.5280.216 Copper2.2781.199 Nickel2.3021.523

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 421.245