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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Fremont-Chapel Way
Trichloroethylene
parts per billion
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit		 Estimated
Risk
2002
0.01 0.01 0.014 0.03 0.04 0.008 28 0.02 0.1
2001
0.01 0.01 0.016 0.03 0.04 0.010 30 0.02 0.2
2000
0.01 0.01 0.020 0.04 0.06 0.014 29 0.02 0.2
1999
0.01 0.01   0.03 0.04 0.009 23 0.02  
1998
0.01 0.01   0.02 0.05 0.011 30 0.02  
1997
0.01 0.01   0.01 0.02 0.003 13 0.02  
1996
0.01 0.01 0.011 0.01 0.03 0.004 31 0.02 0.1
1995
0.01 0.01 0.016 0.03 0.04 0.009 30 0.02 0.2
1994
0.01 0.01 0.013 0.02 0.05 0.009 31 0.02 0.1
1993
0.01 0.01 0.025 0.05 0.14 0.028 30 0.02 0.3
1992
0.01 0.01 0.025 0.05 0.10 0.026 30 0.02 0.3
1991
0.01 0.03 0.034 0.06 0.19 0.038 29 0.02 0.4
1990
0.01 0.03 0.038 0.06 0.12 0.024 30 0.02 0.4
1989
0.03 0.10 0.116 0.20 0.32 0.072 23 0.02 1
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.