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LNAPL Modeling recovery and endpoint example

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US Army Corp of Engineers makes constant<br />

pumping assumption difficult<br />

Groundwater Pumping Rate<br />

System Wide<br />

50<br />

45<br />

One layer model<br />

timeframe<br />

Actual Pumping Rate<br />

Average Pumping Rate<br />

Modelled Pumping Rate<br />

31.9 gpm<br />

40<br />

Groundwater Pumping Rate (GPM)<br />

35<br />

30<br />

25<br />

20<br />

15<br />

26.0 gpm<br />

23.7 gpm<br />

14.5 gpm<br />

Three layer<br />

model timeframe<br />

15.1 gpm<br />

21.7 gpm<br />

10<br />

5<br />

0<br />

Jun-03 Dec-03 Jun-04 Dec-04 Jun-05 Dec-05 Jun-06 Dec-06 Jun-07 Dec-07 Jun-08<br />

<strong>LNAPL</strong> in the subsurface

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