Loading (50 kb)...'
(continued) f
product
------------------------
TSS............................................ 0.0146 0.00626
O&G........................................ 0.00626 0.00209
pH............................................. (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 6.0 to 9.0.
§ 420.115 Pretreatment standards for existing sources (PSES).
top
Any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403.
§ 420.116 Pretreatment standards for new sources (PSNS).
top
Any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403.
§ 420.117 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology.
(a) Batch.
Subpart K
------------------------------------------------------------------------
BCT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
------------------------
TSS............................................ 0.0730 0.0313
O&G........................................ 0.0313 0.0104
pH............................................. (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 6.0 to 9.0.
(b) Continuous.
Subpart K
------------------------------------------------------------------------
BCT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
------------------------
TSS............................................ 0.102 0.0438
O&G........................................ 0.0438 0.0146
pH............................................. (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 6.0 to 9.0.
Subpart L—Hot Coating Subcategory
top
§ 420.120 Applicability; description of the hot coating subcategory.
top
(a) The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from the operations in which steel is coated with zinc, terne metal, or other metals by the hot dip process, and those rinsing operations associated with that process.
(b) The BPT and BAT limitations for zinc set out below are not applicable to hot coating operations with wastewater treatment facilities achieving, during periods of normal production, zinc discharge levels more stringent than those BPT and BAT limitations. For such operations, the BPT and BAT limitations for zinc shall be determined on a case-by-case basis based upon the existing performance of the wastewater treatment facility. The permitting authority shall evaluate representative effluent data from the wastewater treatment facility during periods of normal production in establishing the case-by-case BPT and BAT limitations. The BPT and BAT limitations specified in 40 CFR 420.122 and 420.123 may be used as the basis for calculating total mass limitations for zinc pursuant to 40 CFR 420.03.
[47 FR 23284, May 27, 1982, as amended at 49 FR 21036, May 17, 1984]
§ 420.121 Specialized definitions.
top
(a) The term galvanizing means coating steel products with zinc by the hot dip process including the immersion of the steel product in a molten bath of zinc metal, and the related operations preceding and subsequent to the immersion phase.
(b) The term terne coating means coating steel products with terne metal by the hot dip process including the immersion of the steel product in a molten bath of lead and tin metals, and the related operations preceding and subsequent to the immersion phase.
(c) The term other coatings means coating steel products with metals other than zinc or terne metal by the hot dip process including the immersion of the steel product in a molten bath of metal, and the related operations preceding the subsequent to the immersion phase.
(d) The term fume scrubber means wet air pollution control devices used to remove and clean fumes originating from hot coating operations.
(e) The term strip, sheet, and miscellaneous products means steel products other than wire products and fasteners.
(f) The term wire products and fasteners means steel wire, products manufactured from steel wire, and steel fasteners manufactured from steel wire or other steel shapes.
§ 420.122 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
(a) Galvanizing, terne coating, and other coatings—(1) Strip, sheet, and miscellaneous products.
Subpart L
------------------------------------------------------------------------
BPT effluent limitations
-------------------------
Average of
Pollutant or pollutant property Maximum daily values
for any 1 for 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
-------------------------
TSS........................................... 0.175 0.0751
O&G....................................... 0.0751 0.0250
Lead.......................................... 0.00113 0.000376
Zinc.......................................... 0.00150 0.000500
Chromium (hexavalent) \1\..................... 0.000150 0.0000501
pH............................................ (\2\) (\2\)
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall apply only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
\2\ Within the range of 6.0 to 9.0.
(2) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
------------------------------------------------------------------------
BPT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
------------------------
TSS............................................ 0.701 0.300
O&G........................................ 0.300 0.100
Lead........................................... 0.00451 0.00150
Zinc........................................... 0.00601 0.00200
Chromium (hexavalent) \1\...................... 0.000600 0.000200
pH............................................. (\2\) (\2\)
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
\2\ Within the range of 6.0 to 9.0.
(2) [Reserved]
(c) Fume scrubbers.
Subpart L
------------------------------------------------------------------------
BPT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kg per day
------------------------
TSS............................................ 38.1 16.3
O&G........................................ 16.3 5.45
Lead........................................... 0.245 0.0819
Zinc........................................... 0.327 0.109
Chromium (hexavalent) \1\...................... 0.0327 0.0109
pH............................................. (\2\) (\2\)
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
\2\ Within the range of 6.0 to 9.0.
The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.
[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21036, May 17, 1984]
§ 420.123 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
(a) Galvanizing, terne coating and other coatings—(1) Strip, sheet, and miscellaneous products scrubbers.
Subpart L
------------------------------------------------------------------------
BAT effluent limitations
---------------------------
Average of
Pollutant or pollutant property daily values
Maximum for for 30
any 1 day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds per
1,000 lb) of
product
---------------------------
Lead........................................ 0.00113 0.000376
Zinc........................................ 0.00150 0.000500
Chromium (hexavalent) \1\................... 0.000150 0.0000501
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewater from the chromate
rinse step.
(2) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
------------------------------------------------------------------------
BAT effluent limitations
-------------------------
Average of
Pollutant or pollutant property Maximum daily values
for any 1 for 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
-------------------------
Lead.......................................... 0.00451 0.00150
Zinc.......................................... 0.00601 0.00200
Chromium (hexavalent) \1\..................... 0.000601 0.000200
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
(2) [Reserved]
(c) Fume scrubbers.
Subpart L
------------------------------------------------------------------------
BAT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kg per day
------------------------
Lead........................................... 0.0368 0.0123
Zinc........................................... 0.0491 0.0164
Chromium (hexavalent) \1\...................... 0.00490 0.00163
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.
[47 FR 23284, May 27, 1982, as amended at 49 FR 21036, May 17, 1984]
§ 420.124 New source performance standards (NSPS).
top
The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.
(a) Galvanizing, terne coating and other coatings—(1) Strip, sheet, and miscellaneous products.
Subpart L
------------------------------------------------------------------------
New source performance
standards
---------------------------
Average of
Pollutant or pollutant property daily values
Maximum for for 30
any 1 day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds per
1,000 lb) of
product
---------------------------
TSS......................................... 0.0438 0.0188
O&G..................................... 0.0188 0.00626
Lead........................................ 0.000282 0.0000939
Zinc........................................ 0.000376 0.000125
Chromium (hexavalent)\1\.................... 0.0000376 0.0000125
pH.......................................... (\2\) (\2\)
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
\2\ Within the range of 6.0 to 9.0.
(2) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
------------------------------------------------------------------------
New source performance
standards
-------------------------
Average of
Pollutant or pollutant property Maximum daily values
for any 1 for 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
-------------------------
TSS........................................... 0.175 0.0751
O&G....................................... 0.0751 0.0250
Lead.......................................... 0.00113 0.000376
Zinc.......................................... 0.00150 0.000500
Chromium (hexavalent)\1\...................... 0.000150 0.0000501
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
\2\ Within the range of 6.0 to 9.0.
(2) [Reserved]
(c) Fume scrubbers.
Subpart L
------------------------------------------------------------------------
Pollutant or pollutant
property
------------------------
Average of
New source performance standards daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
kg/per day
------------------------
TSS............................................ 5.72 2.45
O&G........................................ 2.45 0.819
Lead........................................... 0.0368 0.0123
Zinc........................................... 0.0491 0.0164
Chromium (hexavalent)\1\....................... 0.00490 0.00163
pH............................................. (\2\) (\2\)
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
\2\ Within the range of 6.0 to 9.0.
The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.
[47 FR 23284, May 27, 1982, as amended at 49 FR 21036, May 17, 1984]
§ 420.125 Pretreatment standards for existing sources (PSES).
top
Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.
(a) Galvanizing, terne coating and other coatings—(1) Strip, sheet, and miscellaneous products.
Subpart L
------------------------------------------------------------------------
Pollutant or pollutant
property
-------------------------
Average of
Pretreatment standards for existing sources Maximum daily values
for any 1 for 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
-------------------------
Lead.......................................... 0.00113 0.000376
Zinc.......................................... 0.00150 0.000500
Chromium (hexavalent)\1\...................... 0.000150 0.0000501
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
(2) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
------------------------------------------------------------------------
Pretreatment standards
for existing sources
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
kg/kkg
(pounds
per 1,000
lb) of
product
------------------------
Lead........................................... 0.00451 0.00150
Zinc........................................... 0.00601 0.00200
Chromium (hexavalent)\1\....................... 0.000601 0.000200
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
(2) [Reserved]
(c) Fume scrubbers.
Subpart L
------------------------------------------------------------------------
Pretreatment standards
for existing sources
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kg per day
------------------------
Lead........................................... 0.0368 0.0123
Zinc........................................... 0.0491 0.0164
Chromium (hexavalent)\1\....................... 0.00490 0.00163
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.
[47 FR 23284, May 27, 1982, as amended at 49 FR 21037, May 17, 1984]
§ 420.126 Pretreatment standards for new sources (PSNS).
top
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources:
(a) Galvanizing, terne coatings and other coatings—(1) Strip, sheet, and miscellaneous products.
Subpart L
------------------------------------------------------------------------
Pretreatment standards for
new sources
---------------------------
Average of
Pollutant or pollutant property daily values
Maximum for for 30
any 1 day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds per
1,000 lb) of
product
---------------------------
Lead........................................ 0.000282 0.0000939
Zinc........................................ 0.000376 0.000125
Chromium (hexavalent) \1\................... 0.0000376 0.0000125
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
(2) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
------------------------------------------------------------------------
Pretreatment standards
for new sources
-------------------------
Average of
Pollutant or pollutant property Maximum daily values
for any 1 for 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
-------------------------
Lead.......................................... 0.00113 0.000376
Zinc.......................................... 0.00150 0.000500
Chromium (hexavalent) \1\..................... 0.000150 0.0000501
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
(2) [Reserved]
(c) Fume scrubbers.
Subpart L
------------------------------------------------------------------------
Pretreatment standards
for new sources
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kilograms
per day
------------------------
Lead........................................... 0.0368 0.0123
Zinc........................................... 0.0491 0.0164
Chromium (Hexavalent) \1\...................... 0.00490 0.00163
------------------------------------------------------------------------
\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.
[47 FR 23284, May 27, 1982, as amended at 49 FR 21037, May 17, 1984]
§ 420.127 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology.
(a) Galvanizing, terne coating, and other coatings—(1) Strip, sheet, and miscellaneous products.
Subpart L
------------------------------------------------------------------------
BCT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds
per 1,000
lb) of
product
------------------------
TSS............................................ 0.175 0.0751
O&G........................................ 0.0751 0.0250
pH............................................. (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 6.0 to 9.0.
(2) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
------------------------------------------------------------------------
BCT effluent limitations
-------------------------
Average of
daily
Pollutant or pollutant property Maximum for values for
any 1 day 30
consecutive
days
------------------------------------------------------------------------
Kg/kkg
(pounds per
1,000 lb)
of product
-------------------------
TSS........................................... 0.701 0.300
O&G....................................... 0.300 0.100
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 6.0 to 9.0.
(2) [Reserved]
(c) Fume scrubbers.
Subpart LBAT Effluent Limitations
------------------------------------------------------------------------
BCT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days
------------------------------------------------------------------------
Kilograms
per day
------------------------
TSS............................................ 38.1 16.3
O&G........................................ 16.3 5.45
pH............................................. (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 6.0 to 9.0.
The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.
Subpart M—Other Operations Subcategory
top
Source: 67 FR 64268, Oct. 17, 2002, unless otherwise noted.
§ 420.130 Applicability.
top
The provisions of this subpart are applicable to discharges to waters of the U.S. and the introduction of pollutants into publicly owned treatment works resulting from production of direct-reduced iron and from briquetting and forging operations.
§ 420.131 Specialized definitions.
top
As used in this subpart:
(a) The term briquetting operations means a hot or cold process that agglomerates (presses together) iron-bearing materials into small lumps without melting or fusion. Used as a concentrated iron ore substitute for scrap in electric furnaces.
(b) The term direct-reduced iron (DRI) means iron produced by reduction of iron ore (pellets or briquettes) using gaseous (carbon monoxide-carbon dioxide, hydrogen) or solid reactants.
(c) The term forging means the hot-working of heated steel shapes (e.g., ingots, blooms, billets, slabs) by hammering or hydraulic presses, performed at iron and steel mills.
(d) For briquetting operations, the term product means the amount in tons of briquettes manufactured by hot or cold agglomeration processes.
(e) For direct reduced iron (DRI), the term product means the amount of direct reduced iron and any fines that are produced and sold commercially (as opposed to fines that may be reprocessed on site).
(f) For forging, the term product means the tons of finished steel forgings produced by hot working steel shapes.
(g) The term O&G (as HEM) means total recoverable oil & grease measured as n-hexane extractable materials.
§ 420.132 Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve, for each applicable segment, the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
(a) Direct-reduced iron.
Subpart M_Effluent Limitations (BPT)
------------------------------------------------------------------------
Maximum
Pollutant Maximum monthly
daily\1\ avg.\1\
------------------------------------------------------------------------
TSS......................................... 0.00998 0.00465
pH.......................................... (\2\) (\2\)
------------------------------------------------------------------------
\1\ Pounds per thousand pound of product.
\2\ Within the range of 6.0 to 9.0.
(b) Forging operations.
Subpart M_Effluent Limitations (BPT)
------------------------------------------------------------------------
Maximum
Pollutant Maximum monthly
daily \1\ avg.\1\
------------------------------------------------------------------------
O&G (as HEM)............................ 0.00746 0.00446
TSS......................................... 0.0123 0.00508
pH.......................................... (\2\) (\2\)
------------------------------------------------------------------------
\1\ Pounds per thousand pound of product.
\2\ Within the range of 6.0 to 9.0.
(c) Briquetting. There shall be no discharge of process wastewater pollutants to waters of the U.S.
§ 420.133 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available control technology economically achievable (BAT):
(a) Direct-reduced iron. [Reserved]
(b) Forging operations. [Reserved]
(c) Briquetting. There shall be no discharge of process wastewater pollutants.
§ 420.134 New source performance standards (NSPS).
top
New sources subject to this subpart must achieve the following new source performance standards (NSPS), as applicable.
(a) Direct-reduced iron.
Subpart M_New Source Performance Standards (NSPS)
------------------------------------------------------------------------
Maximum
Pollutant Maximum monthly
daily \1\ avg.\1\
------------------------------------------------------------------------
TSS......................................... 0.00998 0.00465
pH.......................................... (\2\) (\2\)
------------------------------------------------------------------------
\1\ Pounds per thousand pound of product.
\2\ Within the range of 6.0 to 9.0.
(b) Forging operations.
Subpart M_New Source Performance Standards (NSPS)
------------------------------------------------------------------------
Maximum
Pollutant Maximum monthly
daily\1\ avg.\1\
------------------------------------------------------------------------
O&G (as HEM)............................ 0.00746 0.00446
TSS......................................... 0.0123 0.00508
pH.......................................... (\2\) (\2\)
------------------------------------------------------------------------
\1\ Pounds per thousand pound of product.
\2\ Within the range of 6.0 to 9.0.
(c) Briquetting. There shall be no discharge of process wastewater pollutants to waters of the U.S.
§ 420.135 Pretreatment standards for existing sources (PSES).
top
Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for existing sources (PSES):
(a) Direct-reduced iron. [Reserved]
(b) Forging operations. [Reserved]
(c) Briquetting. There shall be no discharge of process wastewater pollutants to POTWs.
§ 420.136 Pretreatment standards for new sources (PSNS).
top
Except as provided in 40 CFR 403.7, any new source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for new sources (PSNS):
(a) Direct-reduced iron. [Reserved]
(b) Forging operations. [Reserved]
(c) Briquetting. There shall be no discharge of process wastewater pollutants to POTWs.
§ 420.137 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best control technology for conventional pollutants (BCT).
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best control technology for conventional pollutants (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in 40 CFR 401.16) in §420.132 for the best practicable control technology currently available (BPT).