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2011 OZONE SEASON THUS FAR – HIGHLIGHTS 10 Exceedance days – bunched between 6/7-7/23 LATE START - JUNE 7 – 1 st Exceedance PREVIOUS 1 ST Exceedances since .075 Standard 2010 – MAY 1 2009 – APRIL 25
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2011 OZONE SEASON THUS FAR – HIGHLIGHTS 10 Exceedance days – bunched between 6/7-7/23 LATE START - JUNE 7 – 1st Exceedance PREVIOUS 1ST Exceedances since .075 Standard 2010 – MAY 1 2009 – APRIL 25 2008 – APRIL 18 2007 – APRIL 23 1 WIDESPREAD EPISODE – JULY 21 - 11 Monitors 1 HIGH VALUE – MARTHA’S VINEYARD JULY 23 8-HOUR VALUE 113 PPB (AQI = 195 Unhealthy) 1-HR VALUE 129 PPB
6 DAY COMPOSITE OF SURFACE PRESSURE ON 2011 EXCEEDANCE DAYS FOR SE MASS
COMPOSITE SURFACE PRESSURE MAP - 6 EXCEEDENCE DAYS AFFECTING INTERIOR AND WESTERN MA - 2011