(Portland, OR) -- The Oregon Department of Environmental Quality is among the state agencies investigating levels of cadmium and arsenic in the air in Southeast Portland. Officials are trying to determine the possible health risks associated with the presence of the pollutants. The findings are from air-quality samples taken in the area of Southeast 22nd Avenue and Powell Boulevard. The Oregon Health Authority says health effects related to arsenic and cadmium exposure depend on how much a person is exposed and for how long.