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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Fresno-1st 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
0.02 0.07 0.194 0.47 1.0 0.225 31 0.04 73
2001
0.02 0.10 0.182 0.42 0.90 0.226 30 0.04 68
2000
0.02 0.09 0.195 0.62 1.0 0.285 30 0.04 73
1999
0.02 0.15 0.214 0.46 0.84 0.225 31 0.04 80
1998
0.02 0.15 0.265 0.78 1.0 0.295 31 0.04 100
1997
0.02 0.14 0.233 0.71 1.0 0.268 31 0.04 87
1996
0.02 0.13 0.234 0.49 1.0 0.230 31 0.04 88
1995
0.02 0.17 0.300 0.78 1.4 0.340 30 0.04 113
1994
0.02 0.22 0.356 0.79 1.8 0.380 31 0.04 134
1993
0.02 0.20 0.342 0.84 1.4 0.347 30 0.04 129
1992
0.02 0.16 0.262 0.61 0.93 0.268 30 0.04 99
1991
0.02 0.19 0.459 1.21 1.7 0.509 30 0.04 173
1990
0.02 0.14   1.04 1.6 0.466 24 0.04  
1989
            0    
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.