Be Part of the Ultimate Safety & Compliance Community
Trending news, knowledge-building content, and more – all personalized to you!
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 metal preparation operations and for coating operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | ||
---|---|---|---|---|
Metal preparation | Coating operation | Metal preparation | Coating operation | |
1 Within the range 7.5 to 10.0 at all times. | ||||
Metric units - mg/m 2 of area processed or coated | ||||
Chromium | 16.82 | 3.41 | 6.81 | 1.38 |
Lead | 6.01 | 1.21 | 5.21 | 1.06 |
Nickel | 56.46 | 11.43 | 40.05 | 8.11 |
Zinc | 53.26 | 10.78 | 22.43 | 4.54 |
Aluminum | 182.20 | 36.87 | 74.47 | 15.07 |
Iron | 112.12 | 22.69 | 56.06 | 11.34 |
Oil and grease | 800.84 | 162.10 | 480.51 | 97.23 |
TSS | 1642.00 | 332.20 | 800.90 | 162.00 |
pH | ( 1) | ( 1) | ( 1) | ( 1) |
English Units - pounds per 1 million ft 2 of area processed or coated | ||||
Chromium | 3.45 | 0.07 | 1.40 | 0.29 |
Lead | 1.23 | 0.25 | 1.07 | 0.22 |
Nickel | 11.57 | 2.34 | 8.20 | 1.66 |
Zinc | 10.91 | 2.21 | 4.60 | 0.93 |
Aluminum | 37.32 | 7.55 | 15.26 | 3.09 |
Iron | 22.96 | 4.65 | 11.48 | 2.32 |
Oil and grease | 164.03 | 33.19 | 98.42 | 19.92 |
TSS | 337.00 | 68.10 | 164.00 | 33.20 |
pH | ( 1) | ( 1) | ( 1) | ( 1) |
[47 FR 53184, Nov. 24, 1982, as amended at 50 FR 36543, Sept. 6, 1985]