40 CFR 421.256 - Pretreatment standards for new sources.

View all text of Subpart W [§ 421.250 - § 421.257]

§ 421.256 - Pretreatment standards for new sources.

Except as provided in 40 CFR 403.7, any new 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 new sources. The mass of wastewater pollutants in primary precious metals and mercury process wastewater introduced into a POTW shall not exceed the following values:

(a) Smelter wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/troy ounce of gold and silver smelted		Lead	0.364	0.169	Mercury	0.195	0.078	Silver	0.377	0.156	Zinc	1.326	0.546	Gold	0.130

(b) Silver chloride reduction spent solution.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/troy ounce of silver reduced in solution		Lead	0.112	0.052	Mercury	0.060	0.024	Silver	0.116	0.048	Zinc	0.408	0.168	Gold	0.040

(c) Electrolytic cells wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/troy ounce of gold refined electrolytically		Lead	5.544	2.574	Mercury	2.970	1.188	Silver	5.742	2.376	Zinc	20.200	8.316	Gold	1.980

(d) Electrolyte preparation wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/troy ounce of silver in electrolyte produced		Lead	0.014	0.007	Mercury	0.008	0.003	Silver	0.015	0.006	Zinc	0.051	0.021	Gold	0.005

(e) Calciner wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of mercury condensed		Lead	6.160	2.860	Mercury	3.300	1.320	Silver	6.380	2.640	Zinc	22.440	9.240	Gold	2.200

(f) Calcine quench water.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of mercury condensed		Lead	4.928	2.288	Mercury	2.640	1.056	Silver	5.104	2.112	Zinc	17.950	7.392	Gold	1.760

(g) Calciner stack gas contact cooling water.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of mercury condensed		Lead	1.162	0.540	Mercury	0.623	0.249	Silver	1.204	0.498	Zinc	4.233	1,743	Gold	0.415

(h) Condenser blowdown.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of mercury condensed		Lead	3.864	1.794	Mercury	2.070	0.828	Silver	4.002	1.656	Zinc	14.080	5.656	Gold	1.380

(i) Mercury cleaning bath water.

PSNS for the Primary Precious Metals and Mercury Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of mercury condensed		Lead	0.392	0.182	Mercury	0.210	0.084	Silver	0.406	0.168	Zinc	1.428	0.588	Gold	0.140

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 421.256