Why Are We Pushing for More Federal Rules to Reduce Regional NOx and SO2? NACAA Meeting May 17, 2010

How Does Transport Really Work? The Transport Cloud ... or the Elevated Ozone Reservoir Every bad ozone day, in the morning hours, a large reservoir of ozone sits above Maryland and the Mid-Atlantic area waiting to mix down. Ozone levels in the reservoir can routinely reach 60 to 100 ppb. In the morning, ozone levels at the surface are very low. Around 10:00 or 11:00, the ozone in the reservoir mixes down to the surface and degrades air quality.

Transport Cloud – Crashing Down to Earth

How Do We Reduce the Transport Cloud? The NOx SIP Call as an example OTAG collaboration in late 90’s EPA finalizes SIP Call in 1998 Very significant regional NOx reductions across the East in the 2003/2004 timeframe Lead to dramatic drops in ozone levels Similar story for SO2 controls and PM

Controls From the NOx SIP Call 55.5% of Units 22.3% of Units Scheduled Startup Units 77.8% of Units Installed between 2003-2007 Phase I Minimal SCR Units Expect Minimal NOx Reductions Phase II Large Number of SCR Units Installed Expect SIGNIFIANT NOx Reductions Especially after 2003-2004 Air Quality should decrease dramatically Data courtesy of The Institute of Clean Air Companies (ICAC).

Regional NOx Emission Reductions Dramatic regional NOx emission reductions in the 2003/2004 time frame NOx reductions from Tier II/LEV II standards also – very gradually - occurring in this same period NOx Reductions at NOx Budget Program Sources Source: EPA Clean Air Markets

Reducing O3 in the Transport Cloud

Progress in Cleaning Maryland’s Air 1-Hour Ozone 8-Hour Ozone Annual Fine Particulate Daily Fine Particulate *2008 data are preliminary.

Other Benefits EPA has estimated the improvements in public health resulting from the 2004 NOx SIP Call controls Up to 1800 lives saved through 2008 Significant health benefits to asthmatics and other individuals with lung disease Multiple other benefits Haze, Chesapeake Bay, O3, PM, NO2, toxics, etc.

So … Let’s work together to do whatever we can to further reduce regional NOx and SO2 emissions Our Priorities EGUs Tougher On-Road Tailpipe Standards (NOx and VOC) ICI Boilers Cement Kilns Marine Engines Locomotives Our larger list Good national controls could save thousands of lives