Radiation Safety Office

WASTE DISPOSAL BY AUTHORIZED USER

Releases to Sewer System (Pullman Campus Only)

In accordance with the Washington State Administrative Code ( WAC 246-221-190 ) Authorized Pullman campus users may release small quantities of non-alpha-emitting radionuclides to the sanitary sewer only if two conditions are met;

  • It is in a readily soluble form or if it is a biological material it is readily dispersible in water
  • The chemical compositions are within limits imposed by state environmental health regulations. (No hazardous wastes are allowed; only aqueous wastes may be released). Contact EH&S for assistance in determining if your waste designates as hazardous/dangerous.

To ensure that total releases do not exceed regulatory limits, authorized users are not to exceed those release limits listed below.

Radionuclide

Release Limit for
One Month in Microcuries

3 H

4,160

14 C

830

For all other isotopes (non- 3 H, non- 14 C, and non-alpha-emitters), 83 microcuries is the limit for each isotope.

No alpha emitting isotopes may be discharged by individual authorized users.

The Radiation Safety Office (RSO) must maintain accurate records of releases to the sanitary sewer.

Each authorized Pullman campus user must record radionuclide sewer releases on a Radioactive Sanitary Sewer Discharge Record form. Use one form for each radionuclide released for each month in which releases are made. Send copies of completed Radioactive Sanitary Sewer Discharge Records to the Radiation Safety Office for any month in which such discharges take place.

Print the PDF master Here or complete onscreen and print to obtain supplies of the form.

Releases to the Atmosphere

Authorized users may release small quantities of non-alpha-emitting radionuclides to the atmosphere.

Each authorized user must record radionuclide releases to the air on a Summary of Radionuclide Disposals to the Air. Use one form for each radionuclide released for each month in which releases are made.

Print the PDF master Here or complete onscreen and print to obtain supplies of the form.

Send copies of the completed forms to the Radiation Safety Office for any month in which such discharges take place.

Disposal of Boxes Used to Ship Radioactive Materials
Boxes used to ship radioactive materials to individual labs may be disposed of after verifying by meter survey and swipe survey the absence of radioactive contamination and defacing any and all markings which would indicate the packaging contains or contained radioactive materials. These verification surveys must be performed by personnel who have been qualified to work with radioactive materials by the Radiation Safety Office.

 

Related Links
Radioactive Delivery Record
Radioactive Sanitary Sewer Disharge Record
Summary of Radionuclides Disposals to the Air

 

Radiation Safety Office, PO Box 641302, Washington State University, Pullman WA 99164-1302, 509-335-8916, Contact Us