CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY > SUBPART S—Primary Molybdenum and Rhenium Subcategory (§421.210 to §421.217) > 421.214—Standards of performance for new sources.

421.214—Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Molybdenum sulfide leachate.
NSPS for the Primary Molybdenum and Rhenium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of molybdenum sulfide leached
Arsenic 0.644 0.287
Lead 0.130 0.060
Nickel 0.255 0.171
Selenium 0.380 0.171
Molybdenum [Reserved] [Reserved].
Ammonia (as N) 61.720 27.130
Fluoride 16.210 9.214
Total suspended solids 6.945 5.556
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(b) Roaster SO2 scrubber.
NSPS for the Primary Molybdenum and Rhenium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of molybdenum sulfide roasted
Arsenic 2.334 1.041
Lead 0.470 0.218
Nickel 0.924 0.621
Selenium 1.377 0.621
Molybdenum [Reserved] [Reserved].
Ammonia (as N) 223.800 98.390
Fluoride 58.770 33.410
Total suspended solids 25.190 20.150
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(c) Molybdic oxide leachate.
NSPS for the Primary Molybdenum and Rhenium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of molybdenum contained in molybdic oxide leached
Arsenic 16.100 7.182
Lead 3.244 1.506
Nickel 6.371 4.286
Selenium 9.499 4.286
Molybdenum [Reserved] [Reserved].
Ammonia (as N) 1,544.000 678.800
Fluoride 405.400 230.500
Total suspended solids 173.800 139.000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(d) Hydrogen reduction furnace scrubber.
NSPS for the Primary Molybdenum and Rhenium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of molybdenum metal powder produced
Arsenic 3.183 1.420
Lead 0.641 0.298
Nickel 1.260 0.847
Selenium 1.878 0.847
Molybdenum [Reserved] [Reserved].
Ammonia (as N) 305.300 134.200
Fluoride 80.150 45.570
Total suspended solids 34.350 27.480
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(e) Depleted rhenium scrubbing solution.
NSPS for the Primary Molybdenum and Rhenium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of molybdenum sulfide roasted
Arsenic 0.995 0.444
Lead 0.201 0.093
Nickel 0.394 0.265
Selenium 0.587 0.265
Molybdenum [Reserved] [Reserved].
Ammonia (as N) 95.440 41.960
Fluoride 25.060 14.250
Total suspended solids 10.740 8.592
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
[50 FR 38355, Sept. 20, 1985, as amended at 55 FR 31702, Aug. 3, 1990]