The nonprofit Environmental Integrity Project [1] used TRI data to identify an 8% increase in benzene [2] emissions from refineries between 2007 and 2008. But the figures may be too low due to problematic underreporting to TRI.
Links:
[1] http://www.environmentalintegrity.org/index.php
[2] http://www.environmentalintegrity.org/news_reports/documents/BENZENEWPFINALwAttachments20100204_000.pdf