40 CFR 421.94: Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

Subpart I—Metallurgical Acid Plant—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per/million pounds) of 100 pct sulfuric acid capacity

Arsenic 3.550 1.584

Cadmium 0.511 0.204

Copper 3.269 1.558

Lead 0.715 0.332

Zinc 2.605 1.073

Fluoride 1 89.390 50.820

Molybdenum 1 [Reserved] [Reserved].

Total suspended solids 38.310 30.650

pH (2) (2)

1 For Molybdenum acid plants only.

2 Within the range of 7.5 to 10.0 at all times.