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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Santa Barbara-W Carillo Street
1,3-Butadiene
parts per billion
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit		 Estimated
Risk
2002
            0    
2001
            0    
2000
0.08       0.43 0.143 5 0.04  
1999
0.04 0.13 0.241 0.52 0.62 0.188 30 0.04 90
1998
0.08 0.22 0.270 0.54 0.83 0.182 30 0.04 102
1997
0.07 0.24 0.298 0.54 0.93 0.196 30 0.04 112
1996
0.10 0.22 0.271 0.50 0.84 0.183 30 0.04 102
1995
0.15 0.22 0.303 0.57 0.88 0.177 29 0.04 114
1994
0.13 0.23 0.344 0.68 0.93 0.229 30 0.04 129
1993
0.10 0.29 0.386 0.70 0.97 0.249 31 0.04 145
1992
0.10 0.29 0.339 0.79 1.1 0.274 28 0.04 127
1991
0.08 0.20 0.336 0.89 1.1 0.314 34 0.04 126
1990
0.10 0.36 0.474 0.95 1.5 0.355 27 0.04 178
1989
0.02 0.30 0.428 0.83 1.2 0.314 21 0.04 161
Notes:  Values below the Limit of Detection (LoD) assumed to be ½ LoD.
Means and risks shown only for years with data in all 12 months.
Risks shown only for those substances with unit risk factors.