U.S. EPA Approvals
OPSIS Air Quality Monitoring DOAS system is designated equivalent to 40 CFR.
Parameter/Report No.
SO2 EQSA-0495-101
NO2 EQNA-0495-102
O3 EQOA-0495-103
OPSIS UV DOAS AQM system for benzene, ammonia and nitric oxide is U.S. ETV EPA tested.
OPSIS SM200 particulate monitor is designated equivalent method.
Parameter/Report No.
PM2.5 EQPM-0812-203
PM10 EQPM-0810-193
U.S. EPA List of Designated Methods >>
Notification for PM2.5 in the Federal Register >>
U.S. EPA website >>
U.S. ETV EPA website >>