40 C.F.R. § 421.204
Standards of performance for new sources.
Cite as 40 C.F.R. § 421.204 (2026)
Any new source subject to this subpart shall achieve the following new source performance standards: (a) Spent battery electrolyte. NSPS for the Secondary Mercury Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of mercury produced from batteries Lead 0.030 0.014 Mercury 0.016 0.006 Total suspended solids 1.590 1.272 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Acid wash and rinse water. NSPS for the Secondary Mercury Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of mercury washed and rinsed Lead 0.00056 0.00026 Mercury 0.00030 0.00012 Total suspended solids 0.03000 0.02400 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Furnace wet air pollution control. NSPS for the Secondary Mercury Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of mercury processed through furnace Lead 0.000 0.000 Mercury 0.000 0.000 Total suspended solids 0.000 0.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times.