§ 461.71 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

§ 461.71 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

(a) 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:

(1) Subpart G - Wet Amalgamated Powder Anodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of Zinc
	English units - pounds per 1,000,000 pounds of Zinc
Chromium	1.67	0.68
Mercury	0.95	0.38
Silver	1.56	0.65
Zinc	5.55	2.32
Manganese	2.58	1.10
Oil and grease	76.0	45.6
TSS	155.8	74.1
pH	(1)	(1)

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

(2) Subpart G - Gelled Amalgam Anodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of Zinc
	English units - pounds per 1,000,000 pounds of Zinc
Chromium	0.30	0.12
Mercury	0.17	0.07
Silver	0.28	0.12
Zinc	0.99	0.42
Manganese	0.46	0.20
Oil and grease	13.6	8.16
TSS	27.9	13.26
pH	(1)	(1)

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

(3) Subpart G - Zinc Oxide, Formed Anodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of Zinc
	English units - pounds per 1,000,000 pounds of Zinc
Chromium	62.9	25.7
Mercury	35.8	14.3
Silver	58.7	24.3
Zinc	208.8	87.2
Manganese	97.2	41.5
Oil and grease	2,860.0	1,716.0
TSS	5,863.0	2,789.0
pH	(1)	(1)

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

(4) Subpart G - Electrodeposited Anodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of zinc deposited
	English units - pounds per 1,000,000 pounds of zinc deposited
Chromium	1,404.0	574.0
Mercury	798.0	319.0
Silver	1,308.0	543.0
Zinc	4,657.0	1,946.0
Manganese	2,169.0	925.0
Oil and grease	63,800.0	38,280.0
TSS	130,700.0	62,210.0
pH	(1)	(1)

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

(5) Subpart G - Silver Powder, Formed Cathodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of silver applied
	English units - pounds per 1,000,000 pounds of silver applied
Chromium	86.2	35.3
Mercury	49.0	19.6
Silver	80.4	33.3
Zinc	286.2	119.6
Manganese	133.3	56.8
Oil and grease	3,920.0	2,350.0
TSS	8,036.0	3,822.0
pH	(1)	(1)

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

(6) Subpart G - Silver Oxide Powder, Formed Cathodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of silver applied
	English units - pounds per 1,000,000 pounds of silver applied
Chromium	57.7	23.6
Mercury	32.8	13.1
Silver	53.7	22.3
Zinc	191.3	79.9
Manganese	89.1	38.0
Oil and grease	2,620.0	1,570.0
TSS	5,370.0	2,554.0
pH	(1)	(1)

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

(7) Subpart G - Silver Peroxide Cathodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of silver applied
	English units - pounds per 1,000,000 pounds of silver applied
Chromium	13.8	5.65
Mercury	7.85	3.14
Silver	12.9	5.34
Zinc	45.8	19.2
Manganese	21.4	9.11
Oil and grease	628.0	377.0
TSS	1,287.0	612.0
pH	(1)	(1)

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

(8) Subpart G - Nickel Impregnated Cathodes.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of nickel applied
	English units - pounds per 1,000,000 pounds of nickel applied
Chromium	721.6	295.2
Mercury	410.0	164.0
Nickel	3,149.0	2,083.0
Silver	672.4	279.0
Zinc	2,394.4	1,000.4
Manganese	1,115.2	475.6
Oil and grease	32,800.0	19,680.0
TSS	67,240.0	31,980.0
pH	(1)	(1)

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

(9) Subpart G - Miscellaneous Wastewater Streams.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of cells produced
	English units - pounds per 1,000,000 pounds of cells produced
Chromium	3.85	1.58
Cyanide	2.54	1.05
Mercury	2.19	0.88
Nickel	16.82	11.12
Silver	3.59	1.49
Zinc	12.79	5.34
Manganese	5.96	2.54
Oil and grease	175.20	105.12
TSS	359.16	170.82
pH	(1)	(1)

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

(10) Subpart G - Silver Etch.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of silver processed
	English units - pounds per 1,000,000 pounds of silver processed
Chromium	21.6	8.84
Mercury	12.3	4.91
Silver	20.2	8.35
Zinc	71.7	30.0
Manganese	33.4	14.3
Oil and grease	982.0	589.2
TSS	2,013.1	957.5
pH	(1)	(1)

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

(11) Subpart G - Silver Peroxide Production.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of silver peroxide processed
	English units - pounds per 1,000,000 pounds of silver peroxide processed
Chromium	23.0	9.40
Mercury	13.1	5.22
Silver	21.4	8.88
Zinc	76.2	31.80
Manganese	35.5	15.10
Oil and grease	1,044.0	627.00
TSS	2,140.0	1,018.00
pH	(1)	(1)

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

(12) Subpart G - Silver Powder Production.

BPT Effluent Limitations

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	Metric units - mg/kg of silver powder processed
	English units - pounds per 1,000,000 pounds of silver powder processed
Chromium	9.33	3.82
Mercury	5.30	2.12
Silver	8.69	3.61
Zinc	30.95	12.93
Manganese	14.42	6.15
Oil and grease	424.0	254.40
TSS	869.0	413.40
pH	(1)	(1)

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

(b) There shall be no discharge allowance for process wastewater pollutants from any battery manufacturing operation other than those battery manufacturing operations listed above.

[49 FR 9134, Mar. 9, 1984; 49 FR 13879, Apr. 9, 1984]