40 C.F.R. § 437.11

Current through September 30, 2024
Section 437.11 - Effluent limitations attainable by the application of the best practicable control technology currently available (BPT)
(a) Except as provided in 40 CFR 125.30 through 125.32 or § 437.10(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&G20550.2
pH(2)(2)
TSS60.031.0
Metal Parameters
Antimony0.2490.206
Arsenic0.1620.104
Cadmium0.4740.0962
Chromium15.53.07
Cobalt0.1920.124
Copper4.141.06
Lead1.320.283
Mercury0.002340.000739
Nickel3.951.45
Silver0.1200.0351
Tin0.4090.120
Titanium0.09470.0618
Vanadium0.2180.0662
Zinc2.870.641

1 mg/L (ppm).

2 Within the range 6 to 9.

(b) The following in-plant limitations apply to metal-bearing wastewater containing cyanide:

In-Plant Limitations

Regulated
parameter
Maximum daily1 Maximum monthly avg.1
Cyanide500178

1 mg/L (ppm).

40 C.F.R. §437.11

65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003