420.103—Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

(a) Cold rolling mills— (1) Recirculation—single stand.

Subpart J

Pollutant or pollutant property	BAT effluent limitations
Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
Chromium 1	0.0000209	0.0000084
Lead	0.0000094	0.0000031
Nickel 1	0.0000188	0.0000063
Zinc	0.0000063	0.0000021
Naphthalene	0.0000021
Tetrachloroethylene	0.0000031
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.

(2) Recirculation—multiple stands.

Subpart J

Pollutant or pollutant property	BAT effluent limitations
Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
Chromium 1	0.000104	0.0000418
Lead	0.0000469	0.0000156
Nickel 1	0.0000939	0.0000313
Zinc	0.0000313	0.0000104
Naphthalene	0.0000104
Tetrachloroethylene	0.0000156
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.

(3) Combination.

Subpart J

Pollutant or pollutant property	BAT effluent limitations
Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
Chromium 1	0.00125	0.000501
Lead	0.000563	0.000188
Nickel 1	0.00113	0.000376
Zinc	0.000376	0.000125
Naphthalene	0.000125
Tetrachloroethylene	0.000188
Code of Federal Regulations 440
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are cotreated with descaling or combination acid pickling wastewaters.

(4) Direct application—single stand.

Subpart J

Pollutant or pollutant property	BAT effluent limitations
Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
Chromium 1	0.000376	0.000150
Lead	0.000169	0.0000563
Nickel 1	0.000338	0.000113
Zinc	0.000113	0.0000376
Naphthalene	0.0000376
Tetrachloroethylene	0.0000563
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.

(5) Direct application—multiple stands.

Subpart J

Pollutant or pollutant property	BAT effluent limitations
Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
Chromium 1	0.00167	0.000668
Lead	0.000751	0.000250
Nickel 1	0.00150	0.000501
Zinc	0.000501	0.000167
Naphthalene	0.000167
Tetrachloroethylene	0.000250
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.

(b) Cold worked pipe and tube— (1) Using water.

Subpart J

Pollutant or pollutant property	BAT effluent limitations
Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
Chromium 1	0.0000209	0.0000084
Lead	0.0000094	0.0000031
Nickel 1	0.0000188	0.0000063
Zinc	0.0000063	0.0000021
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are treated with descaling or combination acid pickling wastewaters.

(2) Using oil solutions.

Subpart J

Pollutant or pollutant property	BAT effluent limitations
Pollutant or pollutant property	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
Chromium 1	0.0000209	0.0000084
Lead	0.0000094	0.0000031
Nickel 1	0.0000188	0.0000063
Zinc	0.0000063	0.0000021
Naphthalene	0.0000021
Tetrachloroethylene	0.0000031
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are treated with descaling or combination acid pickling wastewaters.

[47 FR 23284, May 27, 1982, as amended at 49 FR 21035, May 17, 1984]