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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
North Long Beach
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 0.02 0.021 0.04 0.07 0.015 26 0.02 0.2
2001
0.01 0.01   0.04 0.08 0.016 26 0.02  
2000
0.01 0.03 0.029 0.05 0.06 0.015 28 0.02 0.3
1999
0.01 0.01   0.05 0.13 0.030 19 0.02  
1998
0.01 0.02 0.025 0.06 0.07 0.019 30 0.02 0.3
1997
0.01 0.01 0.032 0.05 0.14 0.026 30 0.02 0.3
1996
0.01 0.01   0.03 0.05 0.010 22 0.02  
1995
0.01 0.03 0.032 0.05 0.09 0.016 31 0.02 0.3
1994
0.01 0.01 0.021 0.04 0.08 0.018 29 0.02 0.2
1993
0.01 0.03 0.039 0.06 0.18 0.033 31 0.02 0.4
1992
0.01 0.05 0.083 0.13 0.49 0.092 30 0.02 0.9
1991
0.03 0.08 0.082 0.11 0.16 0.030 29 0.02 0.9
1990
0.04 0.07 0.100 0.13 0.47 0.093 30 0.02 1
1989
0.16 0.39   0.79 1.1 0.264 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.