§61.122. Emission standard.
40 C.F.R. § 61.122
Emissions of polonium-210 to the ambient air from all calciners and nodulizing kilns at an elemental phosphorus plant shall not exceed a total of 2 curies a year; except that compliance with this standard may be conclusively shown if the elemental phosphorus plant:
Installs a Hydro-Sonic ® Tandem Nozzle Fixed Throat Free-Jet Scrubber System including four scrubber units,
All four scrubber units are operated continuously with a minimum average over any 6-hour period of 40 inches (water column) of pressure drop across each scrubber during calcining of phosphate shale,
The system is used to scrub emissions from all calciners and/or nodulizing kilns at the plant, and
Total emissions of polonium-210 from the plant do not exceed 4.5 curies per year.
Notes, amendments, and revision history
Amendments
[56 FR 65943, Dec. 19, 1991]
Source
Source: 54 FR 51699, Dec. 15, 1989, unless otherwise noted.
Authority
Authority: 42 U.S.C. 7401 et seq.
Source
Source: 38 FR 8826, Apr. 6, 1973, unless otherwise noted.
Amendments
[56 FR 65943, Dec. 19, 1991]