On July 15, the Environmental Protection Agency published a proposed rule revising the primary national ambient air quality standard (NAAQS) for oxides of nitrogen measured as nitrogen dioxide, or NO2. The proposal will establish a new short-term standard within the range of 80 to 100 parts per billion (ppb) NO2, and will require NO2 monitoring along major highways. A final rule will be issued by January 22, 2010.
For more information on the proposed rule and opportunities to comment, contact T. Cozzie Consulting Inc.
