Revised System 2a

October 5, 2010 1

REVISED SYSTEM 2AFort Ord A-Aquifer MODFLOW/MT3DMS Simulations

Prelim Results - System 2A - For Discussion Only 1

October 5, 2010 2

Model Setup• Model layers

– 2 layers within upper sand– 1 layer for silt/clay

• Porosity– Sand layers: 0.25– Silt/clay: 0.35

• MT3DMS Parameters– Advection– Dispersion

• Longitudinal: 0.001• Ratio of transverse to longitudinal: 0.2• Ratio of Vertical to longitudinal: 0.1

– Source/Sinks• Sodium lactate applied via injection wells

Prelim Results - System 2A - For Discussion Only 2

October 5, 2010 3

System 2APrevious Model Schedule

Prelim Results - System 2A - For Discussion Only

Day of Simulation

Sodium Lactate Injection

Injection Wells

Extraction Wells

Notes

0 Start Start Start 196 gpm flow

25 Stop

45 Stop Stop

110 End of Simulation

3

October 5, 2010 4

Injection & Extraction Rates

Prelim Results - System 2A - For Discussion Only 4

-15

28

-17

28

-15 -15

28

-15 -15 -15

28

-13

28

-16 -15

28

-15 -15

28

-15

-6

10.69

-10

10.69

-3 -4

10.69

-4 -4

-10

10.69

-2.6

10.69

-10-6.2

10.69

-5 -4

10.69

-6

-20-15-10

-505

101520253035

140 141 144 137 133 129 134 142 138 135 130 126 128 131 123 125 127 121 122 124

Well ID

Dec-09 Sep-10

October 5, 2010 5

Changes since December 2009Model Runs

Prelim Results - System 2A - For Discussion Only 5

Injection and Extraction Wells indicated by red

symbols

Extraction well rates adjusted

Injection well rates adjusted

Layer elevations and K values updated

October 5, 2010 6

Updated K Zones based on new slug test data

Prelim Results - System 2A - For Discussion Only 6

3 3

0.75 to 9

10

2 to 9.5

Updated K values (ft/day) shown in

yellow

6

October 5, 2010 7

System 2ARevised Schedule

Prelim Results - System 2A - For Discussion Only 7

Day of Simulation

Sodium Lactate Injection

Injection Wells

Extraction Wells

Notes

0 Start Start Start 74.83 gpm flow

60 Stop

85 Stop Stop

110 End of Simulation

October 5, 2010 8

11 days

Prelim Results - System 2A - For Discussion Only 8

October 5, 2010 9

28 days

Prelim Results - System 2A - For Discussion Only 9

October 5, 2010 10

60 days Last day of substrate injection

Prelim Results - System 2A - For Discussion Only 10

October 5, 2010 11

70 days10 Days of Recirculation

Prelim Results - System 2A - For Discussion Only 11

October 5, 2010 12

88 days3 days post recirculation

Prelim Results - System 2A - For Discussion Only 12

October 5, 2010 13

110 days25 days post recirculation

Prelim Results - System 2A - For Discussion Only 13