StacksVerified U.S. regulatory reference

40 CFR §420.94

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.
  1. (a)Sulfuric acid pickling (spent acid solutions and rinse waters)—(1) Rod, wire, and coil.
    1. (2)Bar, billet, and bloom.
    2. (3)Strip, sheet, and plate.
    3. (4)Pipe, tube and other products.
    4. (5)Fume scrubbers.
  2. (b)Hydrochloric acid pickling (spent acid solutions and rinse waters)—(1) Rod, wire, and coil.
    1. (2)Strip, sheet, and plate.
    2. (3)Pipe, tube, and other products.
    3. (4)Fume scrubbers.
  3. (c)Combination acid pickling (spent acid solutions and rinse waters)—(1) Rod, wire, and coil.
    1. (2)Bar, billet, and bloom.
    2. (3)Strip, sheet and plate—continuous.
    3. (4)Strip, sheet, and plate—batch.
    4. (5)Pipe, tube, and other products.
    5. (6)Fume scrubbers.