technology currently available.
Except as provided in 40 CFR 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 technology currently available:
(a) Subpart K--Concentrate Digestion Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
concentrate digested
--------------Lead.......................................... 2.612 1.244Zinc.......................................... 9.080 3.794Ammonia (as N)................................ 829.000 364.500Fluoride...................................... 217.700 124.400Total suspended solids........................ 255.000 121.300pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(b) Subpart K--Solvent Extraction Raffinate.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
concentrate digested
--------------Lead.......................................... 3.888 1.851Zinc.......................................... 13.520 5.647Ammonia (as N)................................ 1,233.000 542.500Fluoride...................................... 324.000 185.100Total Suspended Solids........................ 379.500 189.500pH............................................ (\1\) (\1\)------------------------------------------------------------------------Within the range of 7.5 to 10.0 at all times.
(c) Subpart K--Solvent Extraction Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
concentrate digested
--------------
Lead.......................................... 1.032 .491Zinc.......................................... 3.586 1.498Ammonia (as N)................................ 327.400 143.900Fluoride...................................... 85.960 49.120Total suspended solids........................ 100.700 47.890pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(d) Subpart K--Precipitation and Filtration.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
concentrate digested
--------------
Lead.......................................... 5.750 2.738Zinc.......................................... 19.990 8.350Ammonia (as N)................................ 1,825.000 802.200Fluoride...................................... 479.100 273.800Total suspended solids........................ 561.300 267.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(e) Subpart K--Precipitation and Filtration Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
concentrate digested
--------------
Lead.......................................... 26.680 12.700Zinc.......................................... 92.730 38.740Ammonia (as N)................................ 8,466.000 3,722.000Fluoride...................................... 2,223.000 1,270.000Total suspended solids........................ 2,604.000 1,239.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(f) Subpart K--Tantalum Salt Drying.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
tantalum salt dried
--------------
Lead.......................................... 25.430 12.110Zinc.......................................... 88.390 36.930Ammonia (as N)................................ 8,070.000 3,548.000Fluoride...................................... 2,119.000 1,211.000Total suspended solids........................ 2,482.000 1,181.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(g) Subpart K--Oxides Calcining Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
columbium-tantalum oxide
dried
--------------Lead.......................................... 16.140 7.685Zinc.......................................... 56.100 23.440Ammonia (as N)................................ 5,122.000 2,252.000Fluoride...................................... 1,345.000 768.500Total suspended solids........................ 1,576.000 749.200pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(h) Subpart K--Reduction of Tantalum Salt to Metal.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
tantalum salt reduced
--------------Lead.......................................... 69.750 33.220Zinc.......................................... 242.500 101.300Ammonia (as N)................................ 22,140.000 9,732.000Fluoride...................................... 5,813.000 3,322.000Total suspended solids........................ 6,809.000 3,239.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(i) Subpart K--Reduction of Tantalum Salt to Metal Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
tantalum salt reduced
--------------Lead.......................................... .858 .409Zinc.......................................... 2.983 1.246Ammonia (as N)................................ 272.400 119.700Fluoride...................................... 71.510 40.860Total suspended solids........................ 83.770 39.840pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(j) Subpart K--Tantalum Powder Wash.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
tantalum power washed
--------------Lead.......................................... 8.582 4.087Zinc.......................................... 29.830 12.470Ammonia (as N)................................ 2,724.000 1,198.000Fluoride...................................... 715.200 408.700Total suspended solids........................ 837.800 398.500pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(k) Subpart K--Consolidation and Casting Contact Cooling.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
columbium or tantalum
cast or consolidated
--------------Lead.......................................... .000 .000Zinc.......................................... .000 .000Ammonia (as N)................................ .000 .000Fluoride...................................... .000 .000Total suspended solids........................ .000 .000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times. [49 FR 8817, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984; 50 FR 12253, Mar. 28, 1985]