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

2. 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.

3. Transport Cloud – Crashing Down to Earth

4. 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

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

6. 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

7. Reducing O3 in the Transport Cloud

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

9. 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.

10. 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