Preliminary Summary of 2010 Ozone Season in New Jersey

1. Preliminary Summary of 2010 Ozone Season in New Jersey

2. Weather Summary

3. Days Over 90 Degrees In New Jersey Source: New Jersey State Climatologist Data are preliminary and subject to change Data through September 8, 2010

4. Summer Average Temperatures 10 Highest Years (June – August) Data Since 1895 Source: New Jersey State Climatologist Data are preliminary and subject to change

5. Summer Precipitation 10 Driest Years Source: New Jersey State Climatologist Data are preliminary and subject to change

8. Ozone Summary

9. Ozone Standards • 1-Hour Standard: 0.12 ppm • 1997: Revised to an 8 – Hour Standard of 0.08 ppm • 2008: 8 – Hour Standard Lowered to 0.075 ppm • January 6, 2010: Proposed Lowering to 0.060 – 0.070 ppm and Adding A Secondary Standard

10. Proposed Secondary Ozone Standard • W 126 Index in Range of 7 to 15 ppm-hours • Daily W126 Index: sum of the sigmoidally weighted hourly ozone concentrations during the 12-hour daylight period, 8:00 a.m. to 7:59 p.m. • Highest 3 – Month Sum

12. Maximum 8-Hour Average of 0.111 ppm at Bayonne on July 6, 2010 Unhealthy Unhealthy for Sensitive Groups Moderate Good

16. Preliminary 8- Hour Design Values For New Jersey Sites 2008 – 2010 Parts per Million (ppm) * 2010 data is preliminary and subject to change. 4th Max is based on data through September 3, 2010 + Newark site was not operational in 2008

17. Ozone 4th Highest 1 Hour Daily Maximum Parts Per Billion 2008 – Sept. 10, 2010 ( ) – Based on only one full year’s data Preliminary Data – Subject to Change