40 CFR 424.12 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

§ 424.12 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Except as provided in §§ 125.30 through 125.32, and subject to the provisions of paragraph (a) of this section, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
Effluent characteristic Effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed—
1 Within the range 6.0 to 9.0.
Metric units (kg/Mwh)
TSS 0.319 0.160
Chromium total .006 .0032
Chromium VI .0006 .0003
Manganese total .064 .032
pH (1) (1)
English units (lb/Mwh)
TSS .703 .352
Chromium total .014 .007
Chromium VI .0014 .0007
Manganese total .141 .070
pH (1) (1)
[39 FR 6809, Feb. 22, 1974, as amended at 60 FR 33957, June 29, 1995]

Title 40 published on 2014-07-01

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