40 CFR 421.216: Pretreatment standards for new sources.

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. The mass of wastewater pollutants in primary molybdenum and rhenium process wastewater introduced into a POTW shall not exceed the following values:

(a) Molybdenum sulfide leachate.

PSNS 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

(b) Roaster SO2 scrubber.

PSNS 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

(c) Molybdic oxide leachate.

PSNS 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

(d) Hydrogen reduction furnace scrubber.

PSNS 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

(e) Depleted rhenium scrubbing solution.

PSNS 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