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| Year | Months Present |
Minimum | Median | Mean | 90th Percentile |
Maximum | Standard Deviation |
Number of Observations |
Detection Limit |
Estimated Risk |
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| 2002 |
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0.08 | 0.27 | 0.631 | 1.5 | 2.2 | 0.574 | 31 | 0.05 | 58 | ||||||||||||
| 2001 |
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0.08 | 0.4 | 0.61 | 1.26 | 3.1 | 0.672 | 30 | 0.05 | 56 | ||||||||||||
| 2000 |
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0.1 | 0.5 | 0.73 | 1.9 | 3.1 | 0.86 | 30 | 0.2 | 68 | ||||||||||||
| 1999 |
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0.1 | 0.5 | 0.80 | 1.7 | 2.9 | 0.73 | 31 | 0.2 | 74 | ||||||||||||
| 1998 |
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0.1 | 0.5 | 0.83 | 2.3 | 2.8 | 0.83 | 31 | 0.2 | 76 | ||||||||||||
| 1997 |
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0.1 | 0.5 | 1.00 | 2.4 | 5.8 | 1.19 | 31 | 0.2 | 92 | ||||||||||||
| 1996 |
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0.25 | 0.25 | 0.79 | 1.5 | 3.1 | 0.70 | 33 | 0.5 | 73 | ||||||||||||
| 1995 |
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0.25 | 1.0 | 1.24 | 2.4 | 4.5 | 1.11 | 30 | 0.5 | 115 | ||||||||||||
| 1994 |
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0.25 | 1.0 | 1.44 | 3.1 | 7.6 | 1.55 | 31 | 0.5 | 133 | ||||||||||||
| 1993 |
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0.25 | 1.2 | 1.35 | 3.6 | 4.4 | 1.26 | 30 | 0.5 | 125 | ||||||||||||
| 1992 |
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0.25 | 1.0 | 1.34 | 2.8 | 3.8 | 1.05 | 30 | 0.5 | 124 | ||||||||||||
| 1991 |
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0.25 | 1.6 | 2.42 | 5.4 | 7.3 | 2.04 | 30 | 0.5 | 224 | ||||||||||||
| 1990 |
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0.25 | 1.3 | 5.2 | 5.4 | 1.78 | 24 | 0.5 | ||||||||||||||
| 1989 |
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0 |
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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. |
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