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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Stockton-Hazelton 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 0.09 0.146 0.28 0.52 0.118 28 0.04 55
2001
0.02 0.11 0.130 0.20 0.48 0.105 31 0.04 49
2000
0.02 0.09 0.155 0.49 0.77 0.187 31 0.04 58
1999
0.05 0.13 0.180 0.36 0.58 0.137 31 0.04 68
1998
0.07 0.14 0.206 0.44 0.59 0.148 31 0.04 77
1997
0.02 0.15 0.181 0.34 0.56 0.127 31 0.04 68
1996
0.07 0.14 0.206 0.44 0.64 0.148 31 0.04 77
1995
0.06 0.19 0.250 0.54 0.64 0.164 30 0.04 94
1994
0.08 0.20 0.281 0.49 0.80 0.188 31 0.04 106
1993
0.10 0.23   0.80 1.2 0.291 32 0.04  
1992
0.02 0.20 0.217 0.46 0.76 0.164 28 0.04 82
1991
0.02 0.16 0.321 0.70 0.95 0.270 29 0.04 121
1990
0.07 0.29 0.336 0.70 0.87 0.228 29 0.04 126
1989
0.13 0.29 0.388 0.82 1.3 0.302 22 0.04 146
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.