Re: Radioactivity in fertilizer

[estill@golder.com (Erik Still at GAI_SEATTLE_WA)]

     In response to Michael Williamson's request:
     
     EPA regulations concerning radioactive content of fertilizers appear 
     to be restricted to emissions from processing of these materials, not 
     the radioactive content of the materials themselves.  EPA Standards 
     for Airborne Emissions of Radionuclides (40CFR61) specifies a limit of 
     20 pCi/m^2s (0.7 Bq/m^2s) from phosphogypsum stacks, and a limit on 
     annual emissions of Po-210 of 2 Ci (0.07 TBq) from elemental 
     phosphorous plants.
     
     Thanks to Bernie Shleien (editor, The Health Physics and Radiological 
     Health Handbook).
     
                        Erik Still 
                        estill@golder.com


______________________________ Reply Separator _________________________________
>Subject: Radioactivity in fertilizer
>Author:  mwilliam@mailbox.uq.oz.au (Michael Williamson) at internet
>Date:    3/28/95 9:14 PM


>Does anyone know if there are US EPA regulations concerning allowable 
>radioactive content of fertilizers?
     
>I recall that some fertilizers obtained from natural phosphate deposits 
>can have a significant U or Th content; were regulations to control such 
>releases ever drawn up?
     
>If so, I would appreciate information such as the title of the regulation 
>and if possible, some hard numbers.
     
>Michael Williamson                              ph +61 7 365 4504 
>Radiation Protection Adviser                    fax +61 7 365 1577 
>Occupational Health and Safety Unit
>University of Queensland
>Brisbane 4072
>Australia
     
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From: mwilliam@mailbox.uq.oz.au (Michael Williamson)
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Subject: Radioactivity in fertilizer
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