1. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 1 LCLS Conventional Facilities Dick McDonald Deputy Systems Manager

2. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 2 Tunnel Safety & Logistics Site Layout Tunnel & Cavern X-Sections Tunnel Safety Tunnel Utilities

3. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 3 Overall Site Plan

4. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 4 Tunnel Layout RSY UH Tunnel Length = 575.5’ Min cover = 20’ Max cover = 60’ X-Ray Tunnel Length = 645.4’ Min cover = 40’ Max cover = 80’ FEH Cavern Length = 227’ Min cover = 80’ Max cover = 100’ Access Tunnel Length = 324’ Min cover = 20’ Max cover = 100’ NORTH

5. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 5 FEH Cavern X-Section FEH Cavern 48.5’ Wide 32.8’ High 16’ Rock dowels Excavation Sequence # Lattice Girder & 12” Shotcrete

6. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 6 UH Tunnel X-Section UH Tunnel 21’ Wide 18.5’ High Concave invert designed to resist uplifting 2’ thick + concave section to increase floor rigidity

7. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 7 Sequential Excavation & Support Cycle 1.Excavate with road header 2.Scale & prepare surface for shotcrete 3.Apply 3” shotcrete 4.Install girder section 5.Install rock dowels as required 6.Apply 3” shotcrete 7.Start next cycle

8. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 8 Top Heading & portal Support Top heading with lattice girders Portal support Rock dowels Lattice girders Shotcrete Utilities

9. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 9 Road Header at Work 50 ton Road Header

10. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 10 Load, Haul and Dump (LHD)

11. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 11 Shotcrete Pump Pump can be at surface or underground

12. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 12 Construction Safety Items Tunnel Safety Usual Safety Items Hard Hats Eye & Ear Protection Steel Toe Boots Above items are standard issue to employees & visitors entering construction areas.

13. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 13 Tunnel Safety Items Tunnel Required PPE are issued to employees and visitors going underground MSHA Approved Light MSHA = Mine Safety & Health Administration Self Rescuer Converts carbon monoxide to carbon dioxide

14. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 14 Tunnel Additional Required PPE Self rescuer Cap lampRescuer and cap lamp in use

15. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 15 Tunnel Safety Typical Tunnel Hazards Tight working spaces, low light Uneven working & walking surfaces Wet and muddy Working in close proximity to large equipment Falling rocks, earth and shotcrete Utility supply lines Lack of ventilation Noise Methane gas

16. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 16 Tunnel Classification Tunnels are Classified as Gassy, Potential Gassy or Non gassy Madera sandstone can have small isolated pockets of methane gas so our tunnels are potential gassy Equipment and electrical have to be MSHA approved for potential gassy We are not overly concerned about gas, but are taking the next step to be safe

17. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 17 Tunnel Utilities Compressed air – for pneumatic tools Water – for tool use and dust control Electrical power – for equipment & lighting Ventilation – for fresh clean air Communication & Data Discharge water – excess water used in construction

18. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 18 15’ Tunnel Typical tunnel utilities Power & lights Ventilation Com. & Data Water Air Discharge

19. Dick McDonald Tunneling Safety & Logisticsdickmac@slac.stanford.edu April 20, 2006 19 Typical Vent Fan and Lights Vent fan & light stringer