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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.


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