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ES&H for the LCLS Tess Byler, SLAC April 24, 2002

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. Existing Environmental Conditions for the proposed LCLS. Site Setting Soil and Groundwater Conditions.

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ES&H for the LCLS Tess Byler, SLAC April 24, 2002

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  1. ES&H for the LCLSTess Byler, SLACApril 24, 2002 • Existing Environmental Conditions for the proposed LCLS • Potential Environmental Issues for LCLS during construction and operation Tess Byler, ES&H

  2. Existing Environmental Conditions for the proposed LCLS • Site Setting • Soil and Groundwater Conditions Tess Byler, ES&H

  3. Existing Environmental Conditions for the proposed LCLS • Bedrock uplands • Active tectonic area • San Francisquito Creek Tess Byler, ES&H

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

  5. Proposed LCLS layout 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” 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 85-88 for former leaking underground waste solvent tank, other areas in voluntary cleanups Tess Byler, ES&H

  8. Groundwater Flow and Site Investigation Areas Tess Byler, ES&H

  9. Groundwater Wells in the Research Yard Tess Byler, ES&H

  10. Soil and Surface Sediment Summary Tess Byler, ES&H

  11. Soil and Surface Sediment Summary- Research Yard 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 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 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) 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 Tess Byler, ES&H

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