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IDEM Seeks Approval to Throw out PM2.5 Monitoring Network Data


By Andy Bowman, Attorney, Bingham Greenebaum Doll LLP

IDEM is seeking comments in its evaluation of continuous PM2.5 data collected from Indiana’s monitoring network during 2010 – 2012 and its request to EPA for approval to exclude certain data for use in comparison to federal National Ambient Air Quality Standards (NAAQS).

EPA promulgated new requirements in January 2013 that states must follow to determine whether PM2.5 monitoring network data should be used for comparison to NAAQS.  Indiana currently operates 16 continuous PM2.5 monitors at 15 sites across the state.  Ten monitoring sites were evaluated for the period 2010 through 2012.  Of the ten sites, IDEM believes only three produced data suitable for NAAQS comparison and is proposing to request that EPA allow the data from the other seven sites to be excluded.

The proposed data exclusion request is available HERE.  Comments may be mailed to Steve Lengerich, IDEM, 100 N. Senate Avenue, MC 61-54-2, Indianapolis, Indiana 46204-2251 or to until September 30, 2013.

To view a complete PDF of the July/August 2013 issue of the Environmental Letter, click HERE.


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