40 C.F.R. § 420.124
New source performance standards (NSPS).
Cite as 40 C.F.R. § 420.124 (2026)
The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below. (a) Galvanizing, terne coating and other coatings —(1) Strip, sheet, and miscellaneous products. Subpart L Pollutant or pollutant property New source performance standards Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.0438 0.0188 O&G 0.0188 0.00626 Lead 0.000282 0.0000939 Zinc 0.000376 0.000125 Chromium (hexavalent) 1 0.0000376 0.0000125 pH ( 2 ) ( 2 ) 1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step. 2 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 New source performance standards 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 Lead 0.00113 0.000376 Zinc 0.00150 0.000500 Chromium (hexavalent) 1 0.000150 0.0000501 pH ( 1 ) ( 1 ) 1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step. 2 Within the range of 6.0 to 9.0. (2) [Reserved] (c) Fume scrubbers. Subpart L New source performance standards Pollutant or pollutant property Maximum for any 1 day Average of daily values for 30 consecutive days kg/per day TSS 5.72 2.45 O&G 2.45 0.819 Lead 0.0368 0.0123 Zinc 0.0491 0.0164 Chromium (hexavalent) 1 0.00490 0.00163 pH ( 2 ) ( 2 ) 1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step. 2 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. [47 FR 23284, May 27, 1982, as amended at 49 FR 21036, May 17, 1984]