40 CFR 421.254 - Standards of performance for new sources.

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

§ 421.254 - Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Smelter wet air pollution control.

NSPS 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		Oil and Grease	13.000	13.000	Total suspended solids	19.500	15.600	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Silver chloride reduction spent solution.

NSPS 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		Oil and Grease	4.000	4.000	Total suspended solids	6.000	4.800	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(c) Electrolytic cells wet air pollution control.

NSPS 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		Oil and Grease	198.000	198.000	Total suspended solids	297.000	237.600	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(d) Electrolyte preparation wet air pollution control.

NSPS 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		Oil and Grease	0.500	0.500	Total suspended solids	0.750	0.600	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(e) Calciner wet air pollution control.

NSPS 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		Oil and Grease	220.000	220.000	Total suspended solids	330.000	264.000	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(f) Calcine quench water.

NSPS 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		Oil and Grease	176.000	176.000	Total suspended solids	264.000	211.200	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(g) Calciner stack gas contract cooling water.

NSPS 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) or 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		Oil and Grease	41.500	41.500	Total suspended solids	62.250	49.800	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(h) Condenser blowdown.

NSPS 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	5.796	Gold	1.380		Oil and Grease	138.000	138.000	Total suspended solids	207.000	165.600	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

(i) Mercury cleaning bath water.

NSPS 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		Oil and Grease	14.000	14.000	Total suspended solids	21.000	16.800	pH	( 1)	( 1)

1 Within the range of 7.5 to 10.0 at all times.

[50 FR 38361, Sept. 20, 1985; 50 FR 41144, Oct. 9, 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 421.254