Taken from presentation by:Neal Babcock &

Howard Alderson, P.E.Alderson Engineering, Inc.

February 26, 2008

Typical Installation: 100 to +150 ft/ton; 15’ x 15’ to 20’ x

20’ spacing HDPE Piping

4,600 Tons

6,500 Tons

• Underground soil/rock formation strongly affects the performance of the well field;– Sands and Clays;– Rock;

• Affects type of Grouting used.

Primary Loop Variable Flow Circulates around

the Campus Secondary Loop #1

Variable Flow Circulates thru

Borefield Secondary Loop #2

Variable Flow Circulates within a

Building

Campus Distribution Loop: HDPE Pipe; 160 PSI

Rated No Insulation

Borehole Piping HDPE Pipe; 160 PSI

Rated No Insulation

Isolation Valves Butterfly; 150 PSI

Rated Distribution Isolation

Valves Butterfly/Ball Valves;

150 PSI Rated Borehole Grout

Thermally Enhanced Bentonite; K=1.2