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National
United States Regulations
40 CFR PART 424—FERROALLOY MANUFACTURING POINT SOURCE CATEGORY



PART 424—FERROALLOY MANUFACTURING POINT SOURCE CATEGORY



Authority: Secs. 301, 304(b) and (c), 306(b) and (c), 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314(b) and (c), 1316 (b) and (c), 1317(c); 86 Stat. 816 et seq., Pub. L. 92–500; 91 Stat. 1567, Pub. L. 95–217.

Source: 39 FR 6809, Feb. 22, 1974, unless otherwise noted.

Subpart A—Open Electric Furnaces With Wet Air Pollution Control Devices Subcategory
top
§ 424.10 Applicability; description of the open electric furnaces with wet air pollution control devices subcategory.
top
The provisions of this subpart are applicable to discharges resulting from the smelting of ferroalloys in open electric furnaces with wet air pollution control devices. This subcategory includes those electric furnaces of such construction or configuration that the furnace off-gases are burned above the furnace charge level by air drawn into the system. After combustion the gases are cleaned in a wet air pollution control device, such as a scrubber, an electrostatic precipitator with water or other aqueous sprays, etc. The provisions of this subpart are not applicable to noncontact cooling water or to those electric furnaces which are covered, closed, sealed, or semi-covered and in which the furnace off-gases are not burned prior to collection (regulated in subpart B of this part).

§ 424.11 Specialized definitions.
top
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.

(b) The term Mwh shall mean megawatt hour(s) of electrical energy consumed in the smelting process (furnace power consumption).

§ 424.12 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
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 limitations
-----------------------------
Average of daily
Effluent characteristic Maximum values for 30
for any 1 consecutive days
day shall not
exceed_
------------------------------------------------------------------------
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\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


[39 FR 6809, Feb. 22, 1974, as amended at 60 FR 33957, June 29, 1995]

§ 424.13 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
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/
Mwh)
-----------------------------
Chromium total............................ 0.0008 0.0004
Chromium VI............................... .00008 .00004
Manganese total........................... .008 .0039
-----------------------------
English
units (lb/
Mwh)
-----------------------------
Chromium total............................ .0017 .0009
Chromium VI............................... .0002 .0001
Manganese total........................... .017 .0086
------------------------------------------------------------------------


[44 FR 50744, Aug. 29, 1979]

§ 424.14 [Reserved]
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§ 424.15 Standards of performance for new sources.
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The following standards of performance establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a new source subject to the provisions of this subpart:



------------------------------------------------------------------------
Effluent limitations
-----------------------------
Average of daily
Effluent characteristic Maximum values for 30
for any 1 consecutive days
day shall not
exceed_
------------------------------------------------------------------------
Metric
units (kg/
Mwh)
-----------------------------
TSS....................................... 0.024 0.012
Chromium total............................ .0008 .0004
Chromium VI............................... .00008 .00004
Manganese total........................... .008 .0039
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
Mwh)
-----------------------------
TSS....................................... .052 .026
Chromium total............................ .0017 .0009
Chromium VI............................... .0002 .0001
Manganese total........................... .017 .0086
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


§ 424.16 Pretreatment standards for new sources.
top
Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.

[60 FR 33957, June 29, 1995]

§ 424.17 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
top
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 §424.12 of this subpart for the best practicable control technology currently available (BPT).

[51 FR 25000, July 9, 1986]

Subpart B—Covered Electric Furnaces and Other Smelting Operations With Wet Air Pollution Control Devices Subcategory
top
§ 424.20 Applicability; description of the covered electric furnaces and other smelting operations with wet air pollution control devices subcategory.
top
The provisions of this subpart are applicable to discharges resulting from the smelting of ferroalloys in covered electric furnaces or other smelting operations, not elsewhere included in this part, with wet air pollution control devices. This subcategory includes those electric furnaces of such construction or configuration (known as covered, closed, sealed, semi-covered or semi-closed furnaces) that the furnace off-gases are not burned prior to collection and cleaning, and which off-gases are cleaned after collection in a wet air pollution control device such as a scrubber, 'wet' baghouse, etc. This subcategory also includes those non- electric furnace smelting operations, such as exothermic (i.e., aluminothermic or silicothermic) smelting, ferromanganese refining, etc., where these are controlled for air pollution by wet air pollution control devices. This subcategory does not include noncontact cooling water or those furnaces which utilize dry dust collection techniques, such as dry baghouses.

§ 424.21 Specialized definitions.
top
For the purpose of this subpart:

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

(b) The term Mwh shall mean megawatt hour(s) of electrical energy consumed in the smelting process (furnace power consumption).

§ 424.22 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
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/
Mwh)
-----------------------------
TSS....................................... 0.419 0.209
Chromium total............................ .008 .004
Chromium VI............................... .0008 .0004
Manganese total........................... .084 .042
Cyanide total............................. .004 .002
Phenols................................... .006 .004
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
Mwh)
-----------------------------
TSS....................................... .922 .461
Chromium total............................ .018 .009
Chromium VI............................... .0018 .0009
Manganese total........................... .184 .092
Cyanide total............................. .009 .005
Phenols................................... .013 .009
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


Provided, however, That for nonelectric furnace smelting processes, the units of effluent limitations set forth in this section shall be read as “kg/kkg of product” rather than “kg/Mwh,” and the limitations (except for pH) shall be 3.3 times those listed in the table in this section (or, for English units, “lb/ton of product” rather than “lb/Mwh,” and the limitations (except for pH) shall be three times those listed in the table).

[39 FR 6809, Feb. 22, 1974, as amended at 39 FR 17841, May 21, 1974; 60 FR 33957, June 29, 1995]

§ 424.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
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/
Mwh)
-----------------------------
Chromium total............................ 0.001 0.0005
Chromium VI............................... .0001 .00005
Manganese total........................... .011 .005
Cyanide total............................. .0005 .0003
Phenols................................... .0004 .0002
-----------------------------
English
units (lb/
Mwh)
-----------------------------
Chromium total............................ .002 .0012
Chromium VI............................... .0002 .0001
Manganese total........................... .023 .012
Cyanide total............................. .001 .0006
Phenols................................... .0009 .0005
------------------------------------------------------------------------


Provided, however, That for nonelectric furnace smelting processes, the units of effluent limitations set forth in this section shall be read as “kg/kkg of product” rather than “kg/Mwh,” and the limitations (except for pH) shall be 3.3 times those listed in the table in this section (or, for English units, “lb/ton of product” rather than “lb/Mwh,” and the limitations (except for pH) shall be three times those listed in the table).

[44 FR 50744, Aug. 29, 1979]

§ 424.24 [Reserved]
top
§ 424.25 Standards of performance for new sources.
top
The following standards of performance establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a new source subject to the provisions of this subpart:



------------------------------------------------------------------------
Effluent limitations
-----------------------------
Average of daily
Effluent characteristic Maximum values for 30
for any 1 consecutive days
day shall not
exceed_
------------------------------------------------------------------------
Metric
units (kg/
Mwh)
-----------------------------
TSS....................................... 0.032 0.016
Chromium total............................ .001 .0005
Chromium VI............................... .0001 .00005
Manganese total........................... .011 .005
Cyanide total............................. .0005 .0003
Phenols................................... .0004 .0002
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
Mwh)
-----------------------------
TSS....................................... .071 .035
Chromium total............................ .002 .0012
Chromium VI............................... .0002 .0001
Manganese total........................... .023 .012
Cyanide total............................. .001 .0006
Phenols................................... .0009 .0005
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


Provided, however, That for nonelectric furnace smelting processes, the units of effluent limitations set forth in this section shall be read as “kg/kkg of product” rather than “kg/Mwh,” and the limitations (except for pH) shall be 3.3 times those listed in the table in this section (or, for English units, “lb/ton of product” rather than “lb/Mwh,” and the limitations (except for pH) shall be three times those listed in the table).

[39 FR 6809, Feb. 22, 1974, as amended at 39 FR 17841, May 21, 1974]

§ 424.26 Pretreatment standards for new sources.
top
Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.

[60 FR 33957, June 29, 1995]

§ 424.27 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
top
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 §424.22 of this subpart for the best practicable control technology currently available (BPT).

[51 FR 25000, July 9, 1986]

Subpart C—Slag Processing Subcategory
top
§ 424.30 Applicability; description of the slag processing subcategory.
top
The provisions of this subpart are applicable to discharges resulting from slag processing, wherein: (a) The residual metallic values in the furnace slag are recovered via concentration for return to the furnace, or (b) the slag is “shotted” for other further use.

§ 424.31 Specialized definitions.
top
For the purpose of this subpart:

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

§ 424.32 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
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
processed)
-----------------------------
TSS....................................... 2.659 1.330
Chromium total............................ 0.053 0.026
Manganese total........................... .532 .266
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
ton
processed)
-----------------------------
TSS....................................... 5.319 2.659
Chromium total............................ 0.106 0.053
Manganese total........................... 1.064 .532
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


[39 FR 6809, Feb. 22, 1974, as amended at 60 FR 33957, June 29, 1995]

§ 424.33 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
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
processed)
-----------------------------
Chromium total............................ 0.0054 0.0027
Manganese total........................... .054 .027
-----------------------------
English
units (lb/
ton of raw
material)
-----------------------------
Chromium total............................ .011 .0054
Manganese total........................... .108 .054
------------------------------------------------------------------------


[44 FR 50745, Aug. 29, 1979]

§ 424.34 [Reserved]
top
§ 424.35 Standards of performance for new sources.
top
The following standards of performance establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a new source subject to the provisions of this subpart:



------------------------------------------------------------------------
Effluent limitations
-----------------------------
Average of daily
Effluent characteristic Maximum values for 30
for any 1 consecutive days
day shall not
exceed_
------------------------------------------------------------------------
Metric
units (kg/
kkg
processed)
-----------------------------
TSS....................................... 0.271 0.136
Chromium total............................ .0054 .0027
Manganese total........................... 0.054 .027
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
ton
processed)
-----------------------------
TSS....................................... .542 .271
Chromium total............................ .011 .0054
Manganese total........................... .108 .054
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


§ 424.36 Pretreatment standards for new sources.
top
Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.

[60 FR 33957, June 29, 1995]

§ 424.37 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
top
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 §424.32 of this subpart for the best practicable control technology currently available (BPT).

[51 FR 25000, July 9, 1986]

Subpart D—Covered Calcium Carbide Furnaces With Wet Air Pollution Control Devices Subcategory
top
Source: 40 FR 8035, Feb. 24, 1975, unless otherwise noted.

§ 424.40 Applicability; description of the covered calcium carbide furnaces with wet air pollution control devices subcategory.
top
The provisions of this subpart are applicable to discharges resulting from the production of calcium carbide in covered electric furnaces which use wet air pollution control devices. This subcategory includes those electric furnaces of such construction or configuration (known as covered, closed, sealed, semi-covered or semi-closed furnaces) that the furnace off-gases are not burned prior to collection and cleaning, and which off-gases are cleaned after collection in a wet air pollution control device such as a scrubber, ';wet' baghouse, etc. This subcategory does not include noncontact cooling water or those furnaces which utilize dry dust collection techniques, such as dry baghouses.

§ 424.41 Specialized definitions.
top
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.

§ 424.42 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
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 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....................................... 0.380 0.190
Total Cyanide............................. .0056 .0028
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
1000 lb of
product)
-----------------------------
TSS....................................... .380 .190
Total Cyanide............................. .0056 .0028
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


[40 FR 8035, Feb. 24, 1975, as amended at 60 FR 33957, June 29, 1995]

§ 424.43 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
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)
-----------------------------
Total Cyanide............................. 0.0056 0.0028
-----------------------------
English
units (lb/
1000 lb of
product)
-----------------------------
Total Cyanide............................. .0056 .0028
------------------------------------------------------------------------


[44 FR 50745, Aug. 29, 1979]

§§ 424.44-424.46 [Reserved]
top
§ 424.47 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
top
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 §424.42 of this subpart for the best practicable control technology currently available (BPT).

[51 FR 25000, July 9, 1986]

Subpart E—Other Calcium Carbide Furnaces Subcategory
top
Source: 40 FR 8035, Feb. 24, 1975, unless otherwise noted.

§ 424.50 Applicability; description of the other calcium carbide furnaces subcategory.
top
The provisions of this subpart are applicable to discharges resulting from the production of calcium carbide in those covered furnaces which do not utilize wet air pollution control methods. Covered calcium carbide furnaces using wet air pollution control devices are regulated in subpart D of this part. Open (uncovered) calcium carbide furnaces are regulated in part 415, inorganic chemicals manufacturing point source category (39 FR 9612).

§ 424.51 Specialized definitions.
top
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.

§ 424.52 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
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): There shall be no discharge of process waste water pollutants to navigable waters.

[60 FR 33957, June 29, 1995]

§ 424.53 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
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 the best available technology economically achievable: There shall be no discharge of process waste water pollutants to navigable waters.

§§ 424.54-424.56 [Reserved]
top
§ 424.57 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
top
The following limitations establish the quantity or quality of pollutants or pollutant properties, which may be discharged by a point source subject to the provisions of this subpart after application of the best conventional pollutant control technology: There shall be no discharge of process waste water pollutants to navigable waters.

[44 FR 50745, Aug. 29, 1979]

Subpart F—Electrolytic Manganese Products Subcategory
top
Source: 40 FR 8036, Feb. 27, 1975, unless otherwise noted.

§ 424.60 Applicability; description of the electrolytic manganese products subcategory.
top
The provisions of this subpart are applicable to discharges resulting from the manufacture of electrolytic manganese products such as electrolytic manganese metal or electrolytic manganese dioxide.

§ 424.61 Specialized definitions.
top
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.

(b) [Reserved]

§ 424.62 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
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):

(a) 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 producing electrolytic manganese after application of the best practicable control technology currently available:



------------------------------------------------------------------------
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....................................... 6.778 3.389
Manganese................................. 2.771 1.356
Ammonia-N................................. 40.667 20.334
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
1,000 lb
of
product)
-----------------------------
TSS....................................... 6.778 3.389
Manganese................................. 2.771 1.356
Ammonia-N................................. 40.667 20.334
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


(b) 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 producing electrolytic manganese dioxide after application of the best practicable control technology currently available:



------------------------------------------------------------------------
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....................................... 1.762 0.881
Manganese................................. 0.705 .352
Ammonia-N................................. 10.574 5.287
pH........................................ (\1\) (\1\)
-----------------------------
English
units (lb/
1,000 lb
of
product)
-----------------------------
TSS....................................... 1.762 .881
Manganese................................. .705 .352
Ammonia-N................................. 10.574 5.287
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.0.


[40 FR 8036, Feb. 27, 1975, as amended at 60 FR 33957, June 29, 1995]

§ 424.63 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
(a) 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 producing electrolytic manganese 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................................. 0.678 0.339
Ammonia-N................................. 6.778 3.389
-----------------------------
English
units (lb/
1,000 lb
of
product)
-----------------------------
Manganese................................. 0.678 0.339
Ammonia-N................................. 6.778 3.389
------------------------------------------------------------------------


(b) 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 producing electrolytic manganese dioxide 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................................. 0.176 0.088
Ammonia-N................................. 1.762 .881
-----------------------------
English
units (lb/
1,000 lb
of
product)
-----------------------------
Manganese................................. 0.176 0.088
Ammonia-N................................. 1.762 .881
------------------------------------------------------------------------ (continued)