40 CFR 464.42 - 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 D [§ 464.40 - § 464.47]

§ 464.42 - 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 must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available, except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm 3 or lb/billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/1) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to noncontinuous dischargers.

(a) Casting Quench Operations.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		kg/1,000 kkg (pounds per million pounds) of metal poured		Copper (T)	0.0344	0.0187	Lead (T)	0.0353	0.0174	Zinc (T)	0.0509	0.0192	Oil and grease	1.34	0.446	TSS	1.7	0.67	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

	Maximum for any 1 day	Maximum for monthly average	Annual average 1		(mg/1) 2	(mg/1) 2		Copper (T)	0.77	0.42	0.0076	Lead (T)	0.79	0.39	0.0098	Zinc (T)	1.14	0.43	0.0121	Oil and grease	30	10	0.223	TSS	38	15	0.446	pH	( 3)	( 3)	( 3)

1 kg/1000 kkg (pound per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (5.35/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

3 Within the range of 7.0 to 10.0 at all times.

(b) Die Casting Operations.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		kg/1,000 kkg (pounds per million pounds) of metal poured		Copper (T)	0.0066	0.0036	Lead (T)	0.0068	0.0034	Zinc (T)	0.0098	0.0037	Total phenols	0.0074	0.0026	Oil and grease	0.259	0.0864	TTS	0.328	0.13	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

	Maximum for any 1 day	Maximum for monthly average	Annual average 1		(mg/l) 2	(mg/l) 2		Copper (T)	0.77	0.42	0.0015	Lead (T)	0.79	0.39	0.0019	Zinc (T)	1.14	0.43	0.0023	Total phenols	0.86	0.3	0.0017	Oil and grease	30	10	0.0432	TSS	38	15	0.0864	pH	( 3)	( 3)	( 3)

1 kg/1000 kkg (pound per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (1.04/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

3 Within the range of 7.0 to 10.0 at all times.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		kg/62.3 millions Sm 3 (pounds per billion SCF) of air scrubbed		Copper (T)	1.56	0.852	Lead (T)	1.6	0.791	Zinc (T)	2.31	0.872	Total Phenols	1.74	0.608	Oil and grease	60.8	20.3	TSS	77.1	30.4	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

	Maximum for any 1 day	Maximum for monthly average	Annual average 1		(mg/l) 2	(mg/l) 2		Copper (T)	0.77	0.42	0.345	Lead (T)	0.79	0.39	0.446	Zinc (T)	1.14	0.43	0.548	Total Phenols	0.86	0.3	0.406	Oil and grease	30	10	10.1	TSS	38	15	20.3	pH	( 3)	( 3)	( 3)

1 kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.243/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed for a specific plant.

3 Within the range of 7.0 to 10.0 at all times.

(d) Mold Cooling Operations.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		kg/1,000 kkg (pounds per million pounds) of metal poured		Copper (T)	0.304	0.166	Lead (T)	0.311	0.154	Zinc (T)	0.449	0.17	Oil and grease	11.8	3.94	TSS	15	5.91	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

	Maximum for any 1 day	Maximum for monthly average	Annual average 1		(mg/l) 2	(mg/l) 2		Copper (T)	0.77	0.42	0.067	Lead (T)	0.79	0.39	0.0867	Zinc (T)	1.14	0.43	0.106	Oil and grease	30	10	1.97	TSS	38	15	3.94	pH	( 3)	( 3)	( 3)

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (47.3/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

3 Within the range of 7.0 to 10.0 at all times.

[50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]