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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Burbank-W Palm Avenue
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 0.18 0.283 0.70 1.0 0.261 31 0.04 106
2001
0.10 0.23 0.328 0.56 1.2 0.268 30 0.04 123
2000
0.08 0.27 0.345 0.74 0.93 0.242 29 0.04 130
1999
0.04 0.37 0.483 0.92 1.4 0.352 29 0.04 181
1998
0.08 0.36 0.483 1.02 1.3 0.319 29 0.04 182
1997
0.08 0.39 0.421 0.75 1.1 0.265 30 0.04 158
1996
0.13 0.41 0.512 0.77 2.0 0.350 30 0.04 192
1995
0.10 0.53 0.605 0.96 1.7 0.376 31 0.04 227
1994
0.19 0.67 0.752 1.62 1.9 0.497 29 0.04 283
1993
0.16 0.46 0.749 1.6 2.8 0.632 32 0.04 282
1992
0.13 0.60 0.725 1.31 1.6 0.427 30 0.04 272
1991
0.08 0.43 0.623 1.4 1.7 0.481 29 0.04 234
1990
0.23 0.66 0.782 1.6 1.7 0.478 31 0.04 294
1989
0.19 0.63   1.74 2.0 0.572 13 0.04  
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.