Environmental Impact Statement - Sonoma Land Trust

Table 3.11-23. Ambient Air Quality Monitoring Data Measured at the San Rafael Monitoring Station
Pollutant Standards 2004 2005 2006
Ozone
Maximum 1-hour concentration (ppm) 0.091 0.081 0.089
Maximum 8-hour concentration (ppm) 0.063 0.059 0.058
Number of days standard exceeded a
NAAQS 1-hour (>0.12 ppm) 0 0 0
CAAQS 1-hour (>0.09 ppm) 0 0 0
NAAQS 8-hour (>0.075 ppm) 0 0 0
Carbon Monoxide (CO)
Maximum 8-hour concentration (ppm) 1.96 1.66 1.47
Maximum 1-hour concentration (ppm) 2.7 2.5 2.4
Number of days standard exceeded a
NAAQS 8-hour (>9 ppm) 0 0 0
CAAQS 8-hour (>9.0 ppm) 0 0 0
NAAQS 1-hour (>35 ppm) 0 0 0
CAAQS 1-hour (>20 ppm) 0 0 0
Particulate Matter (PM10) b
National c maximum 24-hour concentration (g/m 3 ) 151.0 37.1 64.8
National c second-highest 24-hour concentration (g/m 3 ) 36.0 31.0 40.5
State d maximum 24-hour concentration (g/m 3 ) 52.3 39.1 68.2
State d second-highest 24-hour concentration (g/m 3 ) 37.9 32.6 41.6
National annual average concentration (g/m 3 ) 17.4 16.0 17.6
State annual average concentration (g/m 3 ) e 17.9 16.5 18.1
Number of days standard exceeded a
NAAQS 24-hour (>150 g/m 3 ) f 0.0 0.0 0.0
CAAQS 24-hour (>50 g/m 3 ) f 6.1 0.0 5.8
Particulate Matter (PM2.5)
National c maximum 24-hour concentration (g/m 3 ) - - -
National c second-highest 24-hour concentration (g/m 3 ) - - -
State d maximum 24-hour concentration (g/m 3 ) - - -
State d second-highest 24-hour concentration (g/m 3 ) - - -
National annual average concentration (g/m 3 ) - - -
State annual average concentration (g/m 3 ) e - - -