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Table 1. Parameters Used in TCE and PCE Fate and Transport Simulations.

Contaminant

PCE

TCE

Source Location

MW-5

MW-5

Source Concentration (g/L) a

17,000

600

Effective Porosity, ne b

0.3

0.3

Average Hydraulic Gradient, dh/dx b

0.005

0.005

Average Hydraulic Conductivity, k (ft/d) b

40

40

Pore Groundwater Velocity in x- direction,

Vx = k (dh/dx) / ne (ft/d) c

0.67

0.67

Pore Groundwater Velocity in y- direction, Vy (ft/d) c

0

0

Fraction of Organic Carbon, foc b

0.0003

0.0003

Organic Carbon Partitioning Coefficient, Koc, (mL/g) b

364

152

Distribution Coefficient, Kd=foc Koc (mL/g)

0.109

0.046

Bulk Density, Db (g/mL) b

2.69

2.69

Retardation Coefficient, R = 1 + Kd Db / ne

1.979

1.409

Dispersivity, (ft) d

100

100

Longitudinal Dispersion Coefficient,

67

67

Lateral Dispersion Coefficient - Dy . Dx / 10 (ft2/d)

6.7

6.7

Contaminant Half-Life (day)

conservative

conservative

a The highest concentration ever detected from MW-5.

b Parameters obtained from Table 6.3-1, SECOR (1998).

c Flow direction is northwest and designated as the direction of x coordinate.

d The dispersivity is assumed based on the literature value.


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