eCFR Reference Browser

---

title: "40 CFR §61.122"

source: "https://www.ecfr.gov/current/title-40/section-61.122"

title_number: "40"

volume_number: "10"

chapter_number: "Unknown"

subchapter_code: "C"

subchapter_subject: "AIR PROGRAMS (CONTINUED)"

part_code: "61"

part_subject: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS"

subpart_code: "K"

subpart_subject: "National Emission Standards for Radionuclide Emissions From Elemental Phosphorus Plants"

section_number: "61.122"

section_subject: "Emission standard."

cfr_reference: "40 CFR 61.122"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Parts 61 to 62"

revised_date: "Revised as of July 1, 2019"

publication_date: "As of July 1, 2019"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

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:

(a)Installs a Hydro-Sonic ® Tandem Nozzle Fixed Throat Free-Jet Scrubber System including four scrubber units,

(b)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,

(c)The system is used to scrub emissions from all calciners and/or nodulizing kilns at the plant, and

(d)Total emissions of polonium-210 from the plant do not exceed 4.5 curies per year.

§61.122 - Emission standard.