Environmental Chemistry Research Group

Prof. Paul Tratnyek

Office: HRC-3, Room 356; Phone: 503-346-3431

Prof. Rick Johnson

Office: HRC-3, Room 355; Phone: 503-346-3432


Oregon Health & Science University
3181 SW Sam Jackson Park Road, Mail Code HRC-3
Portland, OR 97239-3098

For delivery directly to the laboratory: add "c/o Jeff Hudson" and replace the mail code above with "HRC-343G".

For delivery of large freight items: change addressee to "Attn: Paul Tratnyek" and replace the mail code above with "Dock 4".


Visitors to OHSU's Marquam Hill Campus come by car, bus, bike, trail, and Portland Aerial Tram. The most convenient parking is in Garage F.

Once in the Hatfield Research Center, take Elevator G to Floor 3.
The Tratnyek/Johnson Labs are toward the back of Room 343.