1. ES&H for the LCLS Tess Byler, SLAC April 24, 2002
Existing Environmental Conditions for the proposed LCLS
Potential Environmental Issues for LCLS during construction and operation
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

2. Existing Environmental Conditions for the proposed LCLS
Site Setting
Soil and Groundwater Conditions
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

3. Existing Environmental Conditions for the proposed LCLS
Bedrock uplands
Active tectonic area
San Francisquito Creek
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

4. Aerial View of SLAC Showing LCLS Layout
Aerial view of LCLS
Aerial View of SLAC Showing LCLS Layout
LCLS
I-280
I-280
Sand Hill Rd
Sand Hill Rd
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

5. Proposed LCLS layout
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

6. Regulatory Framework
Facility wide air permitting for non-radiological parameters (permit in process)
Wastewater discharges to Sanitary Sewer under three discharge permits
Stormwater discharge under “General Permit”
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

7. Regulatory Framework
Evaluation by EPA Hazard Ranking System determined that SLAC was in category “No Further Response Action Planned” (EPA Memo September 21, 1992)
RWQCB Order for former leaking underground waste solvent tank, other areas in voluntary cleanups
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

8. Groundwater Flow and Site Investigation Areas
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

9. Groundwater Wells in the Research Yard
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

10. Soil and Surface Sediment Summary
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

11. Soil and Surface Sediment Summary- Research Yard
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

12. Potential Non-Radiological Issues
Construction Phase
Tunnel
Soil Management Plan Required
Stormwater Pollution Prevention Plan required
Short term traffic issues
Special status species and potential wetlands
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

13. Potential Non-Radiological Issues
Operation Phase
Traffic: Integration with SLAC and Stanford Long Range Development Plan
Utilities
Potential hazards and processes in place to eliminate of minimize hazards
Potential Accident & Emergencies
Total cumulative effects at SLAC
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

14. Radiological Environmental Aspects
Operation Phase – Potential Public Exposure
Maximum direct off-site exposure limit –10mR/year (DOE/USEPA Mandated)
SLAC contribution to background ~5 mR/year
Additional estimated contribution from LCLS to background ~0.2 mR/year
Operation Phase – Potential Environmental Issues
No expectations of any significant tritium production from LCLS. (based on calculations and projected low beam power)
No soil activation expected (low beam power and short lived radio-nuclides)
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H

15. Conclusions Potential Non-Radiological hazards are low for LCLS
Potential Radiological Hazards are low for LCLS
Potential Environmental Effects have been evaluated and addressed
LCLS DOE Review, April 24, 2002
Tess Byler, ES&H