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[44 FR 50745, Aug. 29, 1979]

§§ 424.64-424.66 [Reserved]
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§ 424.67 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
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Except as provided in §§125.30 through 125.32, 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 conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in §401.16) in §424.62 of this subpart for the best practicable control technology currently available (BPT).

[51 FR 25000, July 9, 1986]

Subpart G—Electrolytic Chromium Subcategory
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Source: 40 FR 8037, Feb. 27, 1975, unless otherwise noted.

§ 424.70 Applicability; description of the electrolytic chromium subcategory.
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The provisions of this subpart are applicable to discharges resulting from the manufacture of chromium metal by the electrolytic process. They are not applicable to discharges resulting from the manufacture of chromium metal by aluminothermic or other methods.

§ 424.71 Specialized definitions.
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For the purpose of this subpart:

(a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.

§ 424.72 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
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Except as provided in §§125.30 through 125.32, 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 limitations
-----------------------------
Average of daily
Effluent characteristic Maximum values for 30
for any 1 consecutive days
day shall not
exceed_
------------------------------------------------------------------------
Metric
units (kg/
kkg of
product)
-----------------------------
TSS....................................... 5.276 2.638
Manganese................................. 2.111 1.055
Chromium.................................. 0.106 0.053
Ammonia-N................................. 10.553 5.276
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
1,000 lb
of
product)
-----------------------------
TSS....................................... 5.276 2.638
Manganese................................. 2.111 1.055
Chromium.................................. 0.106 0.053
Ammonia-N................................. 10.553 5.276
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


[40 FR 8037, Feb. 27, 1975, as amended at 60 FR 33957, June 29, 1995]

§ 424.73 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
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The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable:



------------------------------------------------------------------------
Effluent limitations
-----------------------------
Average of daily
Effluent characteristic Maximum values for 30
for any 1 consecutive days
day shall not
exceed_
------------------------------------------------------------------------
Metric
units (kg/
kkg of
product)
-----------------------------
Manganese................................. 0.530 0.265
Chromium.................................. .053 .027
Ammonia-N................................. 5.297 2.649
-----------------------------
English
units (lb/
1,000 lb
of
product)
-----------------------------
Manganese................................. 0.530 0.265
Chromium.................................. .053 .027
Ammonia-N................................. 5.297 2.649
------------------------------------------------------------------------


[44 FR 50746, Aug. 29, 1979]

§§ 424.74-424.76 [Reserved]
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§ 424.77 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
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Except as provided in §§125.30 through 125.32, 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 conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in §401.16) in §424.72 of this subpart for the best practicable control technology currently available (BPT).

[51 FR 25000, July 9, 1986]