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Olin Cleanup Case

Olin Cleanup Case. Central Coast Water Board December 7, 2007 Hector Hernandez Thea Tryon. Presentation Outline. Project Milestones Overview of Current Perchlorate Distribution Groundwater Cleanup Requirements Significant Issues Raised by Interested Parties

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Olin Cleanup Case

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  1. Olin Cleanup Case Central Coast Water Board December 7, 2007 Hector Hernandez Thea Tryon

  2. Presentation Outline • Project Milestones • Overview of Current Perchlorate Distribution • Groundwater Cleanup Requirements • Significant Issues Raised by Interested Parties • Staff Conclusions & Recommendations 2 CENTRAL COAST WATER BOARD

  3. Olin Project Milestones 3

  4. Olin Site Morgan Hill San Martin Source: Olin’s Third Quarter 2007 Groundwater Monitoring Report • - Intermediate Aquifer - Olin Site 101 Gilroy 4 Inset

  5. Phased Cleanup Approach Source: Olin’s Third Quarter 2007 Groundwater Monitoring Report • - Intermediate Aquifer - Intermediate Aquifer Priority Zone A Hydraulic Containment and Treatment of Priority Zones A & B Priority Zone B Priority Zone A Extraction Well Location 5

  6. Olin Site Morgan Hill San Martin Source: Olin’s Third Quarter 2007 Groundwater Monitoring Report • - Shallow Aquifer Shown - Olin Site 101 Gilroy 6 Inset

  7. Olin Site Morgan Hill San Martin Source: Olin’s Third Quarter 2007 Groundwater Monitoring Report • - Deep Aquifer Shown - Olin Site Inset 101 Gilroy 7

  8. Implementation Schedule 8

  9. Interested Parties Comments • Tennant Avenue Well • Expanded Scope of Active Cleanup • Monitored Attenuation and Remedial Contingency Plan 9 CENTRAL COAST WATER BOARD

  10. Conclusions/Recommendations Cleanup requirements and implementation schedule are aggressive, reasonable, and appropriate After considering all evidence provided today, direct the Executive Officer to issue proposed CAO R3-2007-0077 10 CENTRAL COAST WATER BOARD

  11. Source: Olin’s Third Quarter 2007 Groundwater Monitoring Report • Well Installation Locations in • Deep Aquifer _ 16

  12. Source: Olin’s Third Quarter 2007 Groundwater Monitoring Report • Domestic Supply Well > 6 ug/L 8

  13. G.W. Treatment System Soil Remediation Area Source: Olin’s Soil In Situ Bioremediation System Closure Report Railroad Avenue Tennant Avenue 0 200 Groundwater Extraction Well 17 Scale (feet) Treated Groundwater Injection Well

  14. ANDERSON RESERVOIR Source: Olin’s Llagas Subbasin Characterization Report - 2007 G.W. DIVIDE MAIN AVE. PONDS SAN PEDRO PONDS MUSHROOM FARM MADRONE PONDS 18 OLIN SITE

  15. DIANA #2 DIANA #3 MAIN NORDSTROM Source: Olin’s First Quarter 2006 Groundwater Monitoring Report DUNNE #1 DUNNE #2 SAN PEDRO DIANA #1 MP/PZ-3 CONDIT MP/PZ-1 MP/PZ-2 MP/PZ-4 19 TENNANT

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  17. Source: Olin’s Characterization Report 2006 21

  18. 22

  19. Proposed CAO R3-2007-0077 2 CENTRAL COAST WATER BOARD

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