Table 4. Simulated Time in Years for PCE Contamination to Reach Critical Locations.
Concentration |
Model |
A |
B |
C |
D |
E |
1% of Source Concentration |
1D |
3.2** |
7.2 |
11 |
27 |
60 |
2D |
4.2 |
9.2 |
13.3 |
34 |
74 |
|
5% of Source Concentration |
1D |
4.3 |
9 |
13 |
30.5 |
66 |
2D |
6.5 |
13.7 |
21 |
48 |
>100 |
|
10% of Source Concentration |
1D |
5.1 |
10 |
14.5 |
32.7 |
69 |
2D |
9.5 |
24 |
4* |
4 |
4 |
|
20% of Source Concentration |
1D |
7 |
12 |
17 |
36 |
74 |
2D |
4 |
4 |
4 |
4 |
4 |
A - The boundary of the OSP property (x = 1140 ft).
B - 24th Street in the residential area (x = 1960 ft).
C - Half mile down-gradient (x = 2640 ft).
D - One mile down-gradient ( x = 5280 ft).
E - Willamette River ( x = 10400 ft).
* - 4 implies that TCE may not reach the specified location at this concentration level.
** - in years.