Regulations last checked for updates: May 19, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
§ 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
Arsenic0.6440.287
Lead0.1300.060
Nickel0.2550.171
Selenium0.3800.171
Molybdenum[Reserved][Reserved].
Ammonia (as N)61.72027.130
Fluoride16.2109.214
Total suspended solids6.9455.556
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
Arsenic2.3341.041
Lead0.4700.218
Nickel0.9240.621
Selenium1.3770.621
Molybdenum[Reserved][Reserved].
Ammonia (as N)223.80098.390
Fluoride58.77033.410
Total suspended solids25.19020.150
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
Arsenic16.1007.182
Lead3.2441.506
Nickel6.3714.286
Selenium9.4994.286
Molybdenum[Reserved][Reserved].
Ammonia (as N)1,544.000678.800
Fluoride405.400230.500
Total suspended solids173.800139.000
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
Arsenic3.1831.420
Lead0.6410.298
Nickel1.2600.847
Selenium1.8780.847
Molybdenum[Reserved][Reserved].
Ammonia (as N)305.300134.200
Fluoride80.15045.570
Total suspended solids34.35027.480
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
Arsenic0.9950.444
Lead0.2010.093
Nickel0.3940.265
Selenium0.5870.265
Molybdenum[Reserved][Reserved].
Ammonia (as N)95.44041.960
Fluoride25.06014.250
Total suspended solids10.7408.592
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]
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311,1314,c,e,and, 1316 (b) andc, 1317 (b) andc,1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.214