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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Fremont-Chapel Way
Chloroform
parts per billion
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit		 Estimated
Risk
2002
0.01 0.03 0.030 0.04 0.05 0.011 28 0.02 0.8
2001
0.01 0.03 0.029 0.05 0.06 0.015 30 0.02 0.8
2000
0.01 0.03 0.035 0.05 0.11 0.024 29 0.02 0.9
1999
0.01 0.03   0.04 0.05 0.013 23 0.02  
1998
0.01 0.03   0.06 0.07 0.017 28 0.02  
1997
0.01 0.02   0.05 0.05 0.015 13 0.02  
1996
0.01 0.03 0.030 0.05 0.10 0.021 31 0.02 0.8
1995
0.01 0.03 0.031 0.06 0.10 0.024 30 0.02 0.8
1994
0.01 0.01 0.017 0.03 0.06 0.014 30 0.02 0.4
1993
0.01 0.03 0.032 0.06 0.12 0.026 30 0.02 0.8
1992
0.01 0.01 0.021 0.04 0.07 0.015 30 0.02 0.5
1991
0.01 0.01 0.025 0.05 0.08 0.022 30 0.02 0.6
1990
0.01 0.01 0.021 0.04 0.05 0.013 30 0.02 0.5
1989
0.01 0.03 0.028 0.05 0.07 0.018 23 0.02 0.7
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.