FERROALLOY MANUFACTURING POINT SOURCE CATEGORY

• Citation: 40 CFR Part 424
• Sections: 41

§ 424.10 Applicability; description of the open electric furnaces with wet air pollution control devices subcategory.

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.

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.

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—

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.

§ 424.13 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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

§ 424.15 Standards of performance for new sources.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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.

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.

§ 424.17 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

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).

§ 424.20 Applicability; description of the covered electric furnaces and other smelting operations with wet air pollution control devices subcategory.

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.

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.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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).

§ 424.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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).

§ 424.25 Standards of performance for new sources.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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).

§ 424.26 Pretreatment standards for new sources.

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.

§ 424.27 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

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).

§ 424.30 Applicability; description of the slag processing subcategory.

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.

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.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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.

§ 424.33 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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

§ 424.35 Standards of performance for new sources.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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.

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.

§ 424.37 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

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).

§ 424.40 Applicability; description of the covered calcium carbide furnaces with wet air pollution control devices subcategory.

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.

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.

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—

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.

§ 424.43 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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

§ 424.47 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

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).

§ 424.50 Applicability; description of the other calcium carbide furnaces subcategory.

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.

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.

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.

§ 424.53 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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.

§ 424.57 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

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.

§ 424.60 Applicability; description of the electrolytic manganese products subcategory.

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.

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.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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.

§ 424.63 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

(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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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

§ 424.67 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

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).

§ 424.70 Applicability; description of the electrolytic chromium subcategory.

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.

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.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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.

§ 424.73 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 characteristic

Effluent limitations

Maximum for any 1 day

Average of daily values for 30 consecutive days 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

§ 424.77 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

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).