§ 420.127 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

§ 420.127 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

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 conventional technology.

(a) Galvanizing, terne coating, and other coatings -

(1) Strip, sheet, and miscellaneous products.

Subpart L

Pollutant or pollutant property	BCT effluent limitations
	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
TSS	0.175	0.0751
O&G	0.0751	0.0250
pH	(1)	(1)

¹ Within the range of 6.0 to 9.0.

(2) [Reserved]

(b) Galvanizing and other coatings -

(1) Wire products and fasteners.

Subpart L

Pollutant or pollutant property	BCT effluent limitations
	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kg/kkg (pounds per 1,000 lb) of product
TSS	0.701	0.300
O&G	0.300	0.100
pH	(1)	(1)

¹ Within the range of 6.0 to 9.0.

(2) [Reserved]

(c) Fume scrubbers.

Subpart LBAT Effluent Limitations

Pollutant or pollutant property	BCT effluent limitations
	Maximum for any 1 day	Average of daily values for 30 consecutive days
	Kilograms per day
TSS	38.1	16.3
O&G	16.3	5.45
pH	(1)	(1)

¹ Within the range of 6.0 to 9.0.

The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.