Except as provided in 40 CFR 125.30 through 125.32 or § 437.20(b) , any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:
BPT Limitations
Regulated parameter | Maximum daily1 | Maximum monthly avg.1 |
Conventional Parameters | ||
O&G | 127 | 38.0 |
pH | (2) | (2) |
TSS | 74.1 | 30.6 |
Metal Parameters | ||
Arsenic | 2.95 | 1.33 |
Cadmium | 0.0172 | 0.0102 |
Chromium | 0.746 | 0.323 |
Cobalt | 56.4 | 18.8 |
Copper | 0.500 | 0.242 |
Lead | 0.350 | 0.160 |
Mercury | 0.0172 | 0.00647 |
Tin | 0.335 | 0.165 |
Zinc | 8.26 | 4.50 |
Organic Parameters | ||
Bis(2-ethylhexyl) phthalate | 0.215 | 0.101 |
Butylbenzyl phthalate | 0.188 | 0.0887 |
Carbazole | 0.598 | 0.276 |
n-Decane | 0.948 | 0.437 |
Fluoranthene | 0.0537 | 0.0268 |
n-Octadecane | 0.589 | 0.302 |
1 mg/L (ppm).
2 Within the range 6 to 9.
40 C.F.R. §437.21