StacksVerified U.S. regulatory reference

40 CFR §420.92

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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 practicable control technology currently available.
  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.
    4. (5)Acid regeneration (absorber vent scrubber).
  3. (c)Combination acid pickling (spent acid solution 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.