OAR 340-220-0140: Determining Emissions Using Material Balance

The owner or operator may elect to use material balance to determine actual emissions: (1) If the amount of material added to a process, less the amount consumed and recovered in a process, can be documented using DEQ approved permit conditions and this division. (2) The owner or operator may only apply material balance calculations to VOC or sulfur dioxide emissions using OAR 340-220-0150 and 340-220-0160 respectively.