§ 471.81 — Effluent Limitations Representing The Degree Of Effluent Reduction Attainable By The Application Of The Best Practicable Control Technology Currently Available (bpt)

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 for the process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):

(a) Rolling spent neat oils—subpart H—BPT. There shall be no discharge of process wastewater pollutants.

(b) Rolling spent emulsions.

Subpart H—BPT

(c) Rolling contact cooling water.

Subpart H—BPT

(d) Drawing spent emulsions.

Subpart H—BPT

(e) Direct chill casting contact cooling water.

Subpart H—BPT

(f) Stationary casting contact cooling water—subpart H—BPT. There shall be no discharge of process wastewater pollutants.

(g) Heat treatment contact cooling water.

Subpart H—BPT

(h) Surface treatment spent baths.

Subpart H—BPT

(i) Surface treatment rinse.

Subpart H—BPT

(j) Alkaline cleaning spent baths.

Subpart H—BPT

(k) Alkaline cleaning rinse.

Subpart H—BPT

(l) Sawing or grinding spent emulsions.

Subpart H—BPT

(m) Electrocoating rinse.

Subpart H—BPT

(n) Degreasing spent solvents—subpart H—BPT. There shall be no discharge of process wastewater pollutants.