1. Former NAS Moffett Field
Site 25 Remedial Action Update
Bryce Bartelma, PG
Salient Federal Solutions
supporting
Navy BRAC PMO West
November 29, 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. Temporarily Re-route
Storm Water & WATS effluent
Storm Water
Settling Vault
Catch Basin
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5. August 2012 Conditions at IR Site 25
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6. Biological Observations at Site 25
NESTING
• Alameda Song Sparrow
• Western Harrier
• Mockingbird, marsh wren, bushtit and
killdeer
OBSERVED
• Harvest Mice (unidentified subspecies)
• Deer Mice & Voles
• California Least Tern (in flight)
• Black Rail (vocalizing)
• Fox, jackrabbit, and gopher snake
NOT OBSERVED
• Western Pond Turtle (WPT)
• Western Snowy Plover
• California Clapper Rail 6

7. Biological Protection Measures
PROTECTION MEASURES
1. Visually inspect/clear vegetation
prior to removal
2. Hand remove pickleweed
3. Silt fencing along access points
and suitable habitat areas
4. Continuous biological
monitoring
5. Coordination with CDFG and
USFWS
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8. Sediment Excavations
• Planned excavation depths of 0.5 – 1.5
feet below ground surface
• Field surveying to verify dig depths
• Grid confirmation sampling
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9. Over-excavations
• Several samples confirmed additional
over-excavation was required
• Primarily in Eastern Diked Marsh (EDM)
• Depths of up to 5 feet below ground
surface (EDM) encountered groundwater
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10. IR Site 25 Remedial Action Facts
• Excavation depths of 0.5 to 5.0
feet below ground surface
• 36,390 cubic yards of sediment
from nearly 32 acres
• 19,500 linear feet of biological silt
fencing
• Utilized up to 14 biologists
• Bypassed 15,724,800 gallons of
WATS and storm water
• 236 confirmation samples
• 173 days with up to 40 workers
(over 23,502 hours) on site
• 2,173 truck loads of sediment
transported to landfill
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11. Aerial Imagery
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12. Aerial Imagery
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13. Vegetation Restoration
• All vegetation areas removed
during Remedial Action will be
restored (excludes EDM and Pickleweed
inundated mud flats) Salicornia
virginica
• Two types of hydroseed palettes
(High Salt Marsh and Transitional
Upland) will be used with
majority of seeds including
pickleweed and saltgrass
• Minimum of two years monitoring Saltgrass
and maintenance Distichlis
spicata
• Options for irrigation services and
additional hydroseeding/plantings
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14. Schedule
• Sediment Excavations and
Disposal
Completed
• Vegetation Restoration
Nov./Dec. 2012
• Vegetation Monitoring
Ongoing
• Submit Remedial Action
Completion Report
Spring 2013
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15. Questions?
Point of Contact:
Scott Anderson
BRAC Environmental Coordinator
(619) 532-0938
scott.d.anderson@navy.mil
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