|
|
|
||||||||||
|
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
||||||||||||||||||||||||||||||
 |
|||||||||||||||||||||||||||||||
| Year | Months Present |
Minimum | Median | Mean | 90th Percentile |
Maximum | Standard Deviation |
Number of Observations |
Detection Limit |
Estimated Risk |
||||||||||||
| 2002 |
|
0.05 | 1.0 | 1.18 | 2.2 | 4.9 | 0.77 | 477 | 0.1 | 6 | ||||||||||||
| 2001 |
|
0.05 | 0.9 | 1.10 | 2.2 | 4.8 | 0.80 | 491 | 0.1 | 5 | ||||||||||||
| 2000 |
|
0.05 | 0.8 | 1.00 | 2.0 | 4.1 | 0.72 | 491 | 0.1 | 5 | ||||||||||||
| 1999 |
|
0.05 | 1.0 | 1.29 | 2.7 | 8.1 | 1.10 | 584 | 0.1 | 6 | ||||||||||||
| 1998 |
|
0.05 | 0.8 | 1.08 | 2.3 | 5.0 | 0.84 | 601 | 0.1 | 5 | ||||||||||||
| 1997 |
|
0.05 | 1.0 | 1.16 | 2.2 | 4.6 | 0.76 | 559 | 0.1 | 6 | ||||||||||||
| 1996 |
|
0.05 | 1.0 | 1.34 | 2.8 | 7.3 | 1.00 | 610 | 0.1 | 6 | ||||||||||||
| 1995 |
|
0.05 | 0.4 | 0.61 | 1.4 | 5.7 | 0.72 | 608 | 0.1 | 3 | ||||||||||||
| 1994 |
|
0.05 | 1.3 | 1.52 | 2.8 | 7.6 | 1.03 | 607 | 0.1 | 7 | ||||||||||||
| 1993 |
|
0.05 | 1.4 | 1.76 | 3.5 | 6.7 | 1.20 | 590 | 0.1 | 9 | ||||||||||||
| 1992 |
|
0.05 | 1.2 | 1.54 | 3.0 | 8.6 | 1.14 | 522 | 0.1 | 7 | ||||||||||||
| 1991 |
|
0.05 | 1.5 | 1.97 | 3.8 | 14 | 1.52 | 569 | 0.1 | 10 | ||||||||||||
| 1990 |
|
0.05 | 1.4 | 1.73 | 3.4 | 8.3 | 1.23 | 586 | 0.1 | 8 | ||||||||||||
| 1989 |
|
0.1 | 1.9 | 2.11 | 4.1 | 13 | 1.57 | 594 | 0.1 | 10 | ||||||||||||
|
||||||||||||||||||||||
 |
||||||||||||||||||||||
|
|
|
|
| 1989-1995 data and 1996-2002 data represent different methods and should not be compared. | |||
| See Report on a Parallel Carbonyl Monitoring Study Using C18 and Silica Gel Sampling Media for details. | |||
|
|||
 |
|||
 |
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. |
 |
