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California Air Resources Board

Annual Toxics Summary
ARB's ADAM Air Quality Database
Santa Barbara-W Carillo Street
Methylene Chloride
parts per billion
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
Estimated
Risk
2002
            0    
2001
            0    
2000
            0    
1999
0.5 0.5   0.5 0.5 0.00 17 1.0  
1998
0.5 0.5   0.5 0.5 0.00 26 1.0  
1997
0.5 0.5 0.61 1.0 2.8 0.46 29 1.0 2
1996
0.5 0.5 0.73 0.5 3.7 0.77 30 1.0 3
1995
0.5 0.5 0.59 0.5 2.3 0.34 29 1.0 2
1994
0.5 0.5 1.31 0.5 19 3.38 30 1.0 5
1993
0.5 0.5 0.91 1.2 7.7 1.58 31 1.0 3
1992
0.5 0.5 0.54 0.5 1.1 0.14 28 1.0 2
1991
0.5 0.5 0.63 0.5 2.9 0.48 34 1.0 2
1990
0.5 0.5 1.02 1.6 5.2 1.01 26 1.0 4
1989
0.5 0.5 0.89 1.5 3.8 0.87 20 1.0 3
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.