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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
North Long Beach
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 0.14 0.198 0.48 0.59 0.169 26 0.04 75
2001
0.06 0.16   0.52 0.94 0.230 26 0.04  
2000
0.06 0.17 0.278 0.64 0.84 0.219 28 0.04 104
1999
0.07 0.18 0.323 0.54 1.2 0.256 24 0.04 121
1998
0.08 0.25 0.339 0.66 0.94 0.230 30 0.04 127
1997
0.02 0.22 0.364 0.79 0.93 0.276 31 0.04 137
1996
0.11 0.24   0.62 1.0 0.241 22 0.04  
1995
0.13 0.34 0.448 0.83 1.2 0.289 31 0.04 169
1994
0.11 0.31 0.447 0.75 1.5 0.318 30 0.04 168
1993
0.14 0.35 0.575 1.1 1.8 0.450 32 0.04 216
1992
0.10 0.40 0.523 1.02 1.5 0.377 30 0.04 197
1991
0.10 0.28 0.439 0.94 1.5 0.336 29 0.04 165
1990
0.24 0.45 0.592 1.2 1.6 0.384 31 0.04 223
1989
0.23 0.38   1.05 1.7 0.412 20 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.