Well 30 Modeling

Model Grid and Setup

Well 30

Well 31

Well 27

Well UC-H2

Boundaries

Constant Head

GeneralHead

Model Parameters

• 1 layer• Unconfined• Only pumping Wells

– Well 30– Well 31– Well 27

• Boundaries– Constant Head

• Top and Left Side of Model

– General Head• Bottom and Right Side

of Model

Layer Properties

• Conductivity

• Kx = 0.012 cm/sec

• Ky = 0.012 cm/sec

• Kz = 0.0012 cm/sec

• Vx = 130 ft/yr

• Gradient of 0.003

• Storage

• Ss = 0.0002 (1/ft)

• Sy = 0.2

• Effective Porosity = 30%• Total Porosity = 35 %

Initial Conditions

• Water Levels– 1974 Groundwater

contours from Kaiser Steel Corp Report, 1986.

• TDS Concentrations– 2000 model results

from Kaiser Steel Corp Report, 1986.

Well 30: TDS value 254 mg/l (no pumping from year 2000 – 2003)

Well 30: TDS 480 mg/l (with pumping from 2000 – 2003; 2500 gpm)

Well 30 TDS Impact vs. Pumping

Well 30 - TDS Over Timeat various pumping scenarios

0

100

200

300

400

500

600

700

800

0 365 730 1095 1460 1825 2190 2555 2920 3285 3650

Days

TD

S C

on

cen

tra

tio

ns

(m

g/L

)

2500 GPM

2000 GPM

1500 GPM

1000 GPM

No Pumping

Pumping rate 2500 gpm

Well 30 - 2500 GPM

0

100

200

300

400

500

600

700

800

0 365 730 1095 1460 1825 2190 2555 2920 3285 3650

Days

TD

S C

on

cen

tra

tio

ns

(m

g/L

)

2500 GPM

Well 30 (Pumping Rate 0 gpm, 3650 days)

Well 30 Turned Off

0

100

200

300

400

500

600

700

800

0 365 730 1095 1460 1825 2190 2555 2920 3285 3650

Days

TD

S C

on

cen

tra

tio

n (

mg

/L)

No Pumping

Well 30 (Pumping Rate 0 gpm, 3650 days)

Well 30 (Pumping Rate 1000 gpm, 3650 days)

Well 30 (Pumping Rate 1500 gpm, 3650 days)

Well 30 (Pumping Rate 2000 gpm, 3650 days)

Well 30 (Pumping Rate 2500 gpm, 3650 days)

Union Carbide – Particle Tracking 5 years

Union Carbide – Particle Tracking 10 years

Union Carbide – Particle Tracking 15 years