1. Former NAS Moffett Field
Site 25 Remedial Action Update
Bryce Bartelma, PG
Navy BRAC PMO West
May 10, 2012
RAB Meeting

2. IR Site 25
IR 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
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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
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4. 2011 Conditions at IR Site 25
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5. 2012 Conditions at IR Site 25
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6. Step 1: Temporarily Re-route
Storm Water & WATS effluent
Storm Water
Settling Vault
Catch Basin
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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
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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)
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9. SMHM Biological Protection Measures
PROTECTION MEASURES
1. Visually inspect/clear vegetation
prior to removal
Thanks for cleaning 2. Hand remove pickleweed
up the neighborhood!
3. Silt fencing along access points
and suitable habitat areas
4. Continuous biological
monitoring
5. Coordination with CDFG and
USFWS
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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
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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
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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
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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
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14. Questions?
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