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 L--Film Stripping.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
from film stripping
--------------Copper........................................ 95.670 50.350Zinc.......................................... 73.510 30.720Ammonia (as N)................................ 6,712.000 2,951.000Total suspended solids........................ 2,065.000 981.800pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(b) Subpart L--Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
from precipitation and
filtration of film
stripping solutions
--------------Copper........................................ 1.843 .970Zinc.......................................... 1.416 .592Ammonia (as N)................................ 129.300 56.840Total suspended solids........................ 39.770 18.920pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(c) Subpart L--Precipitation and Filtration of Film Stripping Solutions.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
precipitated
--------------Copper........................................ 109.400 57.570Zinc.......................................... 84.050 35.120Ammonia (as N)................................ 7,674.000 3,374.000Total suspended solids........................ 2,361.000 1,123.000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(d) Subpart L--Precipitation and Filtration of Photographic Solutions.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
precipitated
--------------Copper........................................ 50.540 26.600Zinc.......................................... 38.836 16.226Ammonia (as N)................................ 3,545.000 1,559.000Total suspended solids........................ 1,090.600 518.700pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(e) Subpart L--Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
from precipitation and
filtration of
photographic solutions
--------------Copper........................................ 23.070 12.140Zinc.......................................... 17.730 7.406Ammonia (as N)................................ 1,618.000 711.400Total suspended solids........................ 497.800 236.800pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(f) Subpart L--Electrolytic Refining.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
from electrolytic
refining
--------------Copper........................................ 1.444 .760Zinc.......................................... 1.110 .464Ammonia (as N)................................ 101.300 44.540Total suspended solids........................ 31.160 14.820pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(g) Subpart L--Furnace Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
roasted, smelted, or
dried
--------------Copper........................................ 1.273 .670Zinc.......................................... .978 .409Ammonia (as N)................................ 89.310 39.260Total suspended solids........................ 27.470 13.070pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(h) Subpart L--Leaching.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
produced from leaching
--------------Copper........................................ .164 .086Zinc.......................................... .126 .053Ammonia (as N)................................ 11.470 5.040Total suspended solids........................ 3.526 1.677pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(i) Subpart L--Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
produced from leaching
or silver precipitated
--------------Copper........................................ 8.417 4.430Zinc.......................................... 6.468 2.703Ammonia (as N)................................ 590.500 259.600Total suspended solids........................ 181.700 86.390pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(j) Subpart L--Precipitation and Filtration of Nonphotographic Solutions.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
precipitated
--------------Copper........................................ 5.833 3.070Zinc.......................................... 4.482 1.873Ammonia (as N)................................ 409.300 179.900Total suspended solids........................ 125.900 59.870pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(k) Subpart L--Floor and Equipment Washdown.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/troy ounce of silver
production
--------------Copper........................................ .000 .000Zinc.......................................... .000 .000Ammonia (as N)................................ .000 .000Total suspended solids........................ .000 .000pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times. [49 FR 8821, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984]