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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
North Long Beach
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 0.039 0.06 0.10 0.020 26 0.02 1
2001
0.01 0.03   0.05 0.20 0.037 26 0.02  
2000
0.01 0.04 0.048 0.06 0.33 0.058 28 0.02 1
1999
0.01 0.03 0.032 0.05 0.09 0.023 20 0.02 0.8
1998
0.01 0.03 0.040 0.06 0.22 0.041 28 0.02 1
1997
0.01 0.03 0.032 0.05 0.06 0.013 30 0.02 0.8
1996
0.01 0.03   0.07 0.53 0.107 22 0.02  
1995
0.01 0.04 0.041 0.07 0.09 0.019 31 0.02 1
1994
0.01 0.02 0.027 0.05 0.08 0.019 30 0.02 0.7
1993
0.01 0.03 0.042 0.07 0.09 0.020 32 0.02 1
1992
0.01 0.05 0.059 0.11 0.15 0.037 30 0.02 2
1991
0.01 0.03 0.036 0.06 0.08 0.020 28 0.02 0.9
1990
0.01 0.04 0.052 0.08 0.32 0.057 30 0.02 1
1989
0.03 0.05   0.10 0.19 0.038 21 0.02  
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.