DEQ routinely measures: arsenic, beryllium, cadmium, chromium, cobalt, lead, manganese, nickel, selenium and hexavalent chromium, also volatile organic compounds, aldehydes and ketones.
At the air toxics monitoring site in Portland, DEQ uses sampling, analysis system and standard operating procedures the U.S. EPA established. DEQ monitors collect PM10 (particulate less than 10 microns in size) samples over 24 hours, every sixth day, on a filter that the DEQ laboratory analyzes for metals using inductively coupled plasma with mass spectrometry. In addition, DEQ collects gas samples in stainless steel canisters. DEQ laboratory staff analyze these samples using gas chromatography with mass spectrometry. DEQ collects other gas samples in absorber tubes and analyzes them colorimetrically.