1. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Ventilation Cooling Mark A. LaurentiMarch 2002 Modular Configuration

2. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Modular Configuration Mark A. LaurentiMarch 2002 6950 Level

3. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Mark A. LaurentiMarch 2002 Modular Configuration 7100 Level

4. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR March 2002Mark A. Laurenti Modular Configuration

5. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Mark A. LaurentiMarch 2002 Ventilation  Total airflow for the top sill development is planned at 200,000 cfm.  The air would flow into the top access drift, down the chamber ramps and boreholes, and out of the bottom access drift on the 7100 and back to 31 Exhaust.

6. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Cooling Mark A. LaurentiMarch 2002  The 350-ton Dunham-Bush chiller will be used to cool development of the tops of the chambers via chilled water coils.  It is currently planned to keep the ultra-pure detector water at 50°F. Two or three 575-ton machines in the 6950 Vent Plant could supply chilled water for this task. Insulated 12“ supply and return chilled water lines will be installed across the 6950 level to the detector area  Three chambers can be excavated at the same time.

7. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Construction Methodology Estimated Timeline Estimated Costs Mark A. LaurentiMarch 2002 Assumptions

8. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Construction Methodology March 2002Mark A. Laurenti

9. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Mark A. LaurentiMarch 2002 General Parameters Used for Schedule & Cost 3 Shifts / Day x 5 Day / Week  Work Schedule 24 Hourly Employees For One Chamber  Manpower -3 Supervisors  Equipment For Construction Of 1 or 3 Simultaneous Chambers 4 LHD’s 2 Bolters 2 Face Jumbos 1 Long Hole Drills 2 Bench Drills 2 Lift Trucks 2 Support Vehicles 41 Hourly Employees For Three Simultaneous Chambers

10. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Estimated Timeline Mark A. LaurentiMarch 2002 6950 7100 Year One Diamond Drill Development Sill Cut Shrink Cut 80 ft Cable Bolts Shotcrete 1ft Borehole

11. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Estimated Timeline Year Two Mark A. Laurenti 6950 7100 March 2002 Development 60 ft Cable Bolts Borehole 4 Bottom Cuts Decking Precast Liners

12. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Estimated Timeline Year Three Mark A. Laurenti 6950 7100 March 2002 Development 60 ft Cable Bolts 6 Bottom Cuts Precast Liners

13. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Estimated Timeline Year Four Mark A. Laurenti 6950 7100 March 2002 60 ft Cable Bolts 4 Bottom Cuts Precast Liners Shotcrete 1ft Waterproof Liner

14. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Estimated Timeline Mark A. LaurentiMarch 2002 Total time for excavation and construction 208 Weeks or 4 Years

15. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Estimated Costs For 1 Chamber ($MM) Mark A. LaurentiMarch 2002  Labor & Benefits$ 5.51  Other (Outside Contractor)$ 0.12  15% Contingency$ 2.20 TOTAL$ 16.89  Mining & Construction  Equipment Operation$ 1.30  Precast Concrete Liner$ 3.25 Subtotal$ 9.06  Supplies$ 4.51

16. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Estimated Costs Mark A. LaurentiMarch 2002  Operating Costs Not Included In Estimate  Equipment Purchase or Lease  Cost of Waste Handling  General Operation of the Mine  Engineering, Geology  Power and water Consumption

17. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Mark A. LaurentiMarch 2002 Assumptions  A waste handling system is in place and capable of handling up to 540 tons per shift ( 8,000 tons / week) before the excavation work is started on the chamber.  Ventilation is sufficient enough to do more than one activity at a time in the chamber.  Labor is multi-tasked in order to operate and construct all aspects of the chamber.  After construction, shops areas and other miscellaneous excavations will be used for permanently installed equipment such as that needed for cooling, electronics, etc.

18. M EGATON M ODULAR M ULTI -P URPOSE N EUTRINO D ETECTOR Mark A. LaurentiMarch 2002 Summary  Estimated construction time for one chamber is four years  Estimated cost for one chamber is $17.0MM  This is a snapshot of the planning done to date. Any future changes can only improve the design and reduce the cost and time.