Hello CERID,
Happy New Year!

Do you use ultraviolet (UV) lamps in your biosafety cabinets?

UW EH&S, based on recommendations by the National Sanitation Foundation, no longer recommend the use of UV lights for sterilization and decontamination in biosafety cabinets due to various factors affecting their effectiveness. Be sure to use a chemical disinfectact in your biosafety cabinet suitable for the agents that you work with and for a suitable contact time. These may include bleach solutions, hydrogen peroxide solutions, clidox, and others. Ethanol solutions are not appropriate disinfectants for bloodborne pathogens. Be sure use proper personal protective equipment that will provide protection against both biological agents and the chemical disinfectant you are handling.
If you decide to continue to use UV lamps in your biosafety cabinets, ensure that the following precautions are taken:

  • Do not work in or around the biosafety cabinet while the UV light is on.
  • Close the sash completely when the UV light is on. Even small openings can cause skin damage and biological effects.
  • Control access to rooms while lamps are operating to prevent exposure.
  • Personal protective equipment includes UV eyeware, UV faceshields, lab coat or other tightly woven clothing with no gap between the cuff and glove
  • Biosafety cabinets should be labelled with a UV Light Source Caution sticker (Contact radsaf@uw.edu to get stickers).

University of Washington ultraviolet light caution sticker

For more information, consult UW EH&S's The Trouble with UV Light in Your Biosafety Cabinet

Staying Safe With Increased Traffic

As you are hopefully aware by now, a large section of State Route 99 will be closed for approximately three weeks beginning 10 p.m. Friday, January 11. State and local officials are expecting major traffic disruptions regionwide. The tips below will help decrease time on the road, as well as keep you safe:

Map of State Route 99 closure

  • Discuss telecommuting options with your supervisor.
  • Adjust travel to avoid the busiest times. WSDOT has compiled data on travel times during the 2016 Alaskan Way Viaduct Closure. Use this as a reference for potential travel times, but note that Seattle's population has grown by more than 40,000 since this previous closure.
  • Use transit. Trains, light rail, and water taxis will have fewer delays than buses. The following bus routes will be rerouted and may experience significant delays: 21x, 37, 55, 56, 57, 113, 120, 121, 122, 123, 125, C Line.
  • Start or join a carpool.
  • Walk or bike. Use caution! Observe all traffic signals. Cross only at designated crosswalks and signals. Watch for turning vehicles. Make eye contact with drivers. See and be seen.

Head to King County Metro and WSDOT #Realign99 Closure for more information on how to reduce travel times and stay safe.


CERID Safety Team