40 CFR 421.312 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

View all text of Subpart AC [§ 421.310 - § 421.317]

§ 421.312 - 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 shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:

(a) Tungsten detergent wash and rinse.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of tungsten scrap washed		Copper	0.371	0.195	Nickel	0.374	0.248	Ammonia (as N)	25.990	11.430	Cobalt	0.768	0.337	Tungsten	1.357	0.542	Oil and grease	3.900	2.340	Total suspended solids	7.995	3.803	pH	( 1)	( 1)

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

(b) Tungsten leaching acid.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of tungsten produced		Copper	4.885	2.571	Nickel	4.937	3.265	Ammonia (as N)	342.700	150.700	Cobalt	10.130	4.448	Tungsten	17.890	7.147	Oil and grease	51.420	30.850	Total suspended solids	105.400	50.140	pH	( 1)	( 1)

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

(c) Tungsten post-leaching wash and rinse.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of tungsten produced		Copper	9.772	5.143	Nickel	9.875	6.532	Ammonia (as N)	685.600	301.400	Cobalt	20.263	8.897	Tungsten	35.800	14.300	Oil and grease	102.900	61.720	Total suspended solids	210.900	100.300	pH	( 1)	( 1)

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

(d) Synthetic scheelite filtrate.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of synthetic scheelite produced		Copper	31.660	16.660	Nickel	31.990	21.160	Ammonia (as N)	2,221.000	976.300	Cobalt	65.644	28.824	Tungsten	116.000	46.320	Oil and grease	333.200	200.000	Total suspended solids	683.100	324.900	pH	( 1)	( 1)

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

(e) Tungsten carbide leaching wet air pollution control.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of tungsten carbide scrap leached		Copper	3.327	1.751	Nickel	3.362	2.224	Ammonia (as N)	233.400	102.600	Cobalt	6.899	3.029	Tungsten	12.190	4.868	Oil and grease	35.020	21.010	Total suspended solids	71.790	34.150	pH	( 1)	( 1)

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

(f) Tungsten carbide wash water.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of tungsten carbide produced		Copper	15.830	8.333	Nickel	16.000	10.580	Ammonia (as N)	1,111.000	488.300	Cobalt	32.832	14.416	Tungsten	58.000	23.170	Oil and grease	166.700	100.000	Total suspended solids	341.700	162.500	pH	( 1)	( 1)

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

(g) Cobalt sludge leaching wet air pollution control.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of cobalt produced from cobalt sludge		Copper	67.990	35.780	Nickel	68.700	45.440	Ammonia (as N)	4,770.000	2,097.000	Cobalt	140.977	61.901	Tungsten	249.000	99.470	Oil and grease	715.600	429.400	Total suspended solids	1,467.000	697.700	pH	( 1)	( 1)

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

(h) Crystallization decant.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of cobalt produced		Copper	79.140	41.650	Nickel	79.970	52.900	Ammonia (as N)	5,552.000	2,441.000	Cobalt	164.101	72.055	Tungsten	289.900	115.800	Oil and grease	833.000	499.800	Total suspended solids	1,708.000	812.200	pH	( 1)	( 1)

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

(i) Acid wash decant.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of cobalt produced		Copper	36.220	19.060	Nickel	36.600	24.210	Ammonia (as N)	2,541.000	1,117.000	Cobalt	75.104	32.977	Tungsten	132.700	52.990	Oil and grease	381.300	228.800	Total suspended solids	781.600	371.700	pH	( 1)	( 1)

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

(j) Cobalt hydroxide filtrate.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of cobalt produced		Copper	107.600	56.650	Nickel	108.800	71.940	Ammonia (as N)	7,551.000	3,320.000	Cobalt	223.189	97.999	Tungsten	394.300	157.500	Oil and grease	1,133.000	679.800	Total suspended solids	2,323.000	1,105.000	pH	( 1)	( 1)

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

(k) Cobalt hydroxide filter cake wash.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/kg (pounds per million pounds) of cobalt produced		Copper	207.200	109.100	Nickel	209.400	138.500	Ammonia (as N)	14,530.000	6,389.000	Cobalt	429.598	188.631	Tungsten	758.900	303.100	Oil and grease	2,181.000	1,309.000	Total suspended solids	4,471.000	2,126.000	pH	( 1)	( 1)

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

[50 FR 38386, Sept. 20, 1985, as amended at 55 FR 31713, 31714, Aug. 3, 1990]

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 421.312