Liberte Environmental Associates



Air Quality Permits Potentially Affecting Water Quality




Current Draft Air Contaminant Discharge Permit- Released by Oregon Department of Environmental Quality


Ring Industrial Group, LLC: Draft Air Contaminant Discharge Permit Related Documents

The DEQ comment period for this new Air Quality Permit ends February 28, 2007. The facility, located in Portland, Oregon, manufactures drainage products made from polystyrene pellets. The proposed new permit would allow discharge of 39 tons/year of isopentane, a volatile organic compound (VOC), the vapor of which combines with nitrogen oxides in the presence of sunlight to form ozone.

Ring Industrial Group, LLC Public Notice

Ring Industrial Group, LLC Draft Air Contaminant Discharge Permit

Ring Industrial Group, LLC Draft Review Report