Former NAS Moffett FieldSite 25 Remedial Action Update        Bryce Bartelma, PG       Navy BRAC PMO West          May 10,...
IR Site 25IR Site 25 encompasses approximately 230 acres and was constructed for use   as part of the Moffett Field storm ...
Remedial Design and                 Remedial Action Work Plan• Final Remedial Design  and Remedial Action  Work Plan (RD/R...
2011 Conditions at IR Site 25              4
2012 Conditions at IR Site 25              5
Step 1: Temporarily Re-routeStorm Water & WATS effluent                  Storm Water                  Settling Vault      ...
Step 2: Internal Water Management• Cofferdam to isolate polygons requiring remediation• Phased approach to  manage water• ...
Biological Considerations at Site 25      ENDANGERED SPECIES•   Salt Marsh Harvest Mouse (SMHM)•   California Clapper Rail...
SMHM Biological Protection Measures                             PROTECTION MEASURES                           1. Visually ...
Avian Biological Protection Measures                   • Completed presence/absence                     surveys (no endang...
WPTs at Eastern Diked Marsh?•   Minimal standing water at Eastern    Diked Marsh diminishes presence•   California Departm...
Vegetation Restoration•   All vegetation removed during    Remedial Action will be restored           Pickleweed    (exclu...
Schedule• Site Reconnaissance and  Mobilization Preparation  In Progress• Biological Surveys and Waste  Characterization S...
Questions?     14
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Site 25 Update to Moffett RAB May 10, 2012

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Site 25 Update to Moffett RAB May 10, 2012

  1. 1. Former NAS Moffett FieldSite 25 Remedial Action Update Bryce Bartelma, PG Navy BRAC PMO West May 10, 2012 RAB Meeting
  2. 2. IR Site 25IR Site 25 encompasses approximately 230 acres and was constructed for use as part of the Moffett Field storm water management system since 1953 AOI-14 The Navy is coordinating remedial action activities with NASA as they prepare to conduct their cleanup activities at Area of Investigation (AOI)-14 2
  3. 3. Remedial Design and Remedial Action Work Plan• Final Remedial Design and Remedial Action Work Plan (RD/RAWP) distributed on March 30• Removal of over 32,500 cubic yards of sediment from nearly 32 acres• Planned excavation depths of 0.5 – 1.5 feet below ground surface• Restore vegetated areas with pickleweed and other native grass 3
  4. 4. 2011 Conditions at IR Site 25 4
  5. 5. 2012 Conditions at IR Site 25 5
  6. 6. Step 1: Temporarily Re-routeStorm Water & WATS effluent Storm Water Settling Vault Catch Basin 6
  7. 7. Step 2: Internal Water Management• Cofferdam to isolate polygons requiring remediation• Phased approach to manage water• Field changes based on actual water volumes and/or sensitive habitat 7
  8. 8. Biological Considerations at Site 25 ENDANGERED SPECIES• Salt Marsh Harvest Mouse (SMHM)• California Clapper Rail• Western Snowy Plover• California Least Tern• California Seablight (plant) STATE SPECIES OF CONCERN• Western Pond Turtle (WPT) 8
  9. 9. SMHM Biological Protection Measures PROTECTION MEASURES 1. Visually inspect/clear vegetation prior to removalThanks for cleaning 2. Hand remove pickleweedup the neighborhood! 3. Silt fencing along access points and suitable habitat areas 4. Continuous biological monitoring 5. Coordination with CDFG and USFWS 9
  10. 10. Avian Biological Protection Measures • Completed presence/absence surveys (no endangered species observed) • Ongoing and continuous monitoring for sightings and/or nesting • Provide buffers and make field schedule changes (if observed) • Continued coordination with CDFG and USFWS 10
  11. 11. WPTs at Eastern Diked Marsh?• Minimal standing water at Eastern Diked Marsh diminishes presence• California Department of Fish & Game (CDFG) requests trapping & visual surveys• Two types of trapping: – Basking traps – Hoop traps• Trapping with qualified WPT biologists• Observations (and potential relocations) will be coordinated with CDFG 11
  12. 12. Vegetation Restoration• All vegetation removed during Remedial Action will be restored Pickleweed (excludes EDM and inundated Salicornia mud flats) virginica• Two main types of plantings (potential addition of native hydroseed blend, if deemed appropriate by ecologist) Saltgrass• Minimum of two years monitoring Distichlis and maintenance spicata• Options for irrigation services and additional plantings 12
  13. 13. Schedule• Site Reconnaissance and Mobilization Preparation In Progress• Biological Surveys and Waste Characterization Sampling Ongoing• Water Management Spring 2012• Remedial Action Fieldwork and Vegetation Restoration Summer & Fall 2012• Submit Remedial Action Completion Report Spring 2013 13
  14. 14. Questions? 14

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