1. Regulations
  2. title 40
  3. chapter I-i31
  4. part 471
  5. subpart B
  6. § 471.24

View all text of Subpart B [§ 471.20 - § 471.26]

§ 471.24 - Pretreatment standards for existing sources (PSES).

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 by August 23, 1988 achieve the following pretreatment standards for existing sources (PSES). The mass of wastewater pollutants in magnesium forming process wastewater introduced into a POTW shall not exceed the following values:

(a) Rolling spent emulsions.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium rolled with emulsions Chromium0.0330.014 Zinc0.1090.046 Ammonia9.954.37 Fluoride4.441.97

(b) Forging spent lubricants—subpart B—PSE. There shall be no discharge of process wastewater pollutants.

(c) Forging contact cooling water.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium cooled with water Chromium0.1270.052 Zinc0.4220.177 Ammonia38.517.0 Fluoride17.27.63

(d) Forging equipment cleaning wastewater.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium forged Chromium0.0020.0007 Zinc0.0060.003 Ammonia0.5320.234 Fluoride0.2380.106

(e) Direct chill casting contact cooling water.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium cast with direct chill methods Chromiun1.740.711 Zinc5.772.41 Ammonia527232 Fluoride235105

(f) Surface treatment spent baths.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium surface treated Chromiun0.2050.084 Zinc0.6810.285 Ammonia62.127.3 Fluoride27.812.3

(g) Surface treatment rinse.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium surface treated Chromiun0.8320.340 Zinc2.761.16 Ammonia252111 Fluoride11349.9

(h) Sawing or grinding spent emulsions.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium sawed or ground Chromiun0.0090.004 Zinc0.0290.012 Ammonia2.601.15 Fluoride1.160.515

(i) Degreasing Spent Solvents—subpart B—PSES. There shall be no discharge of process wastewater pollutants.

(j) Wet air pollution control scrubber blowdown.

Subpart B—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of magnesium sanded and repaired or forged Chromium0.2730.112 Zinc0.9040.378 Ammonia8.2536.3 Fluoride36.916.4
[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.24