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Title 40 Part 434 → Subpart E → §434.55

Title 40 → Chapter I → Subchapter N → Part 434 → Subpart E → §434.55

Electronic Code of Federal Regulations e-CFR

Title 40 Part 434 → Subpart E → §434.55

e-CFR data is current as of December 3, 2019

Title 40Chapter ISubchapter NPart 434Subpart E → §434.55


Title 40: Protection of Environment
PART 434—COAL MINING POINT SOURCE CATEGORY BPT, BAT, BCT LIMITATIONS AND NEW SOURCE PERFORMANCE STANDARDS
Subpart E—Post-Mining Areas


§434.55   New source performance standards (NSPS).

The following new source performance standards shall apply to the post-mining areas of all new source coal mines:

(a) Reclamation areas. The standards of this subsection apply to discharges from reclamation areas at new source coal mines until SMCRA bond release.

Except as provided in 40 CFR 401.17 and §§434.61 and 434.63 (d)(2) of this part, the following new source performance standards shall be achieved for a discharge subject to the provisions of this subsection:

NSPS Effluent Limitations

Pollutant or pollutant propertyLimitations
Settleable Solids0.5 ml/1 maximum not to be exceeded.
pH(1)

(1)Within the range 6.0 to 9.0 at all times.

(b) Underground mine drainage. The standards in this subsection apply to discharges from the underground workings of new source underground mines until bond release.

(1) Except as provided in 40 CFR 401.17 and §§434.61, 434.62, and 434.63 of this part, the following new source performance standards shall be achieved for the discharge of any acid or ferruginous mine drainage subject to this subsection:

NSPS Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayAverage of daily values for 30 consecutive days
   Concentrations in mg/1
Iron, total6.03.0
Manganese, total4.02.0
TSS70.035.0
pH(1)(1)

1Within the range 6.0 to 9.0 at all times.

(2) Except as provided in 40 CFR 401.17 and §§434.61 and 434.63 of this part, the following new source performance standards shall be achieved for the discharge of any alkaline mine drainage subject to this subsection:

NSPS Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayAverage of daily values for 30 consecutive days
   Concentrations in mg/1
Iron, total6.03.0
TSS70.035.0
pH(1)(1)

1Within the range 6.0 to 9.0 at all times.


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