TABLE OF CONTENTS (Continued)

Section

Page

4.3

Characterizing Ground Water Flow Beneath the Site . . . . . . . . . . . .

4 35

4.3.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 36

4.3.2

Definition of the "Uppermost Aquifer" . . . . . . . . . . . . . .

4 38

4.3.3

Determining Ground Water Flow Direction

and Hydraulic Gradient . . . . . . . . . . . . . . . . . . . . . . . . .

4 39

4.3.3.1

Ground Water Level Measurements . . . . . . . .

4 40

4.3.3.2

Establishing Horizontal Flow Direction

and the Horizontal Component of Hydraulic

Gradient . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 42

4.3.3.3

Establishing Vertical Flow Direction

and the Vertical Component of Hydraulic

Gradient . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 42

4.3.3.4

Seasonal and Temporal Factors . . . . . . . . . . .

4 46

4.3.4

Determining Hydraulic Conductivity . . . . . . . . . . . . . . . .

4 47

4.3.4.1

Determining Hydraulic Conductivity Using

Field Methods . . . . . . . . . . . . . . . . . . . . . . .

4 48

4.3.4.2

Determining Hydraulic Conductivity Using

Laboratory Methods . . . . . . . . . . . . . . . . . . .

4 51

4.3.4.3

Data Evaluation . . . . . . . . . . . . . . . . . . . . . .

4 51

4.3.5

Determining Ground Water Flow Rate . . . . . . . . . . . . . . .

4 52

4.4

Interpreting and Presenting Data . . . . . . . . . . . . . . . . . . . . . . . . . .

4 52

4.4.1

Interpreting Hydrogeologic Data . . . . . . . . . . . . . . . . . . .

4 52

4.4.2

Presenting Hydrogeologic Data . . . . . . . . . . . . . . . . . . . .

4 54

4.4.3

The Conceptual Model . . . . . . . . . . . . . . . . . . . . . . . . .

4 58

November 1992

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