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

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

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.

(a) Primary mills, carbon and specialty -

(1) Without scarfing.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.150	0.0561
O&G	0.0374
pH	(¹)	(¹)

(2) With scarfing.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.221	0.0830
O&G	0.0553
pH	(¹)	(¹)

(b) Section mills -

(1) Carbon.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.357	0.134
O&G	0.0894
pH	(¹)	(¹)

(2) Specialty.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.224	0.0841
O&G	0.0561
pH	(¹)	(¹)

(1) Hot strip and sheet mills, carbon and specialty.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.427	0.160
O&G	0.107
pH	(¹)	(¹)

(2) Carbon plate mills.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.227	0.0851
O&G	0.0568
pH	(¹)	(¹)

(3) Specialty plate mills.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.100	0.0376
O&G	0.0250	(¹)
pH	(¹)	(¹)

(d) Pipe and tube mills, carbon and specialty.

Subpart G

Pollutant or pollutant property	BPT 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
TSS	0.212	0.0795
O&G	0.0530
pH	(¹)	(¹)

                    
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