Presentation to the Moffett Restoration Advisory Board on February 13, 2014, by Scott Anderson of the Navy

1. ACTIVITY NAME
2014 Planned Environmental
Activities
Former Naval Air Station Moffett Field
Restoration Advisory Board Meeting
February 13, 2014

2. Sites
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IR Site 26
Site 14
Vapor Intrusion
Site 28 WATS
Site 25
Site 29 (Hangar 1)
BRAC Program Management Office.

3. Site 26 - EATS
• Navy to Finalize Site 26 Record of Decision (ROD) Amendment in Summer 2014.
• The selected remedy for IR Site 26 is Alternative 5—Biostimulation/Bioaugmentation
Treatment, MNA, and ICs. The main components of the remedy include:
• Actively treating the groundwater by injecting a biostimulation/bioaugmentation nutrient
mixture (dechlorinating bacteria and nutrients) into groundwater to enhance and
accelerate biodegradation of the COCs.
• Monitoring groundwater to verify COC degradation rates, evaluate MNA effectiveness.
• Implementing ICs, which are land use controls (LUCs) that will (1) impose restrictions on
groundwater use and activities that could result in human exposure to contaminated
groundwater, and; (2) notify and require property owners and developers that any new
building planned for construction at IR Site 26 be designed and constructed in a manner
that will mitigate potential unacceptable health risks from vapor intrusion. ICs will remain
in effect until cleanup standards have been met in groundwater underlying the site.
• Conducting five year reviews to evaluate the effectiveness and protectiveness of the
remedy.
• Planned 2014 work includes conducting a Data Gaps investigation in the two anticipated
remedial action areas to assist in the remedial design and new monitoring well
placement.
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BRAC Program Management Office.

4. Site 26 Site Map
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BRAC Program Management Office.

5. Petroleum Site 14 South
• In situ air sparging with soil vapor
extraction (IAS/SVE) was identified
as the preferred approach to
remediate petroleum hydrocarbons
in groundwater at Site 14 South.
• Additional site characterization
revealed that petroleum
hydrocarbon impacts were more
widespread than previous
groundwater data suggested.
• In order to address the increased
area requiring treatment, the Navy
elected to implement biosparging,
a less aggressive treatment
approach over a larger treatment.
Figure 1. Site Location Map
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BRAC Program Management Office.

6. Petroleum Site 14 South
• The objective of the work to be
conducted in 2014 is to implement
more aggressive active treatment to
address persistent elevated
concentrations of petroleum
hydrocarbons in shallow groundwater
at Site 14 South.
• Elevated concentrations of
contaminants of concern have resulted
in the Navy’s decision to repurpose the
existing biosparging treatment system
to support more aggressive IAS/SVE
activities in certain portions of the
treatment area.
• System construction is planned for
April 2014
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BRAC Program Management Office.

7. Vapor Intrusion
• Complete planned 2014 indoor air sampling in the Navy’s
area of responsibility. (President’s and Memorial Day
weekends)
• Develop Remedial Design/Remedial Action Work Plans to
implement the tiering requirements. The draft Remedial
Design is scheduled for summer 2015.
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BRAC Program Management Office.

8. Site 28 WATS
Planned work for Site 28 Includes:
• Continued operation and maintenance of the West
Side Aquifers Treatment System (WATS)
groundwater extraction system.
• Complete the Technical Memorandum of the
Building 88/Traffic Island source area investigation.
• Work with the agencies to determine path forward in
regards to the potential optimization of WATS, and
remedial action in the Building 88/Traffic Island
areas.
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BRAC Program Management Office.

9. Site 25 and Hangar 1
At Site 25:
• Continued monitoring of the vegetation re-growth in the
areas requiring enhancement as part of the remedial
action.
Hangar 1:
• Finalize the Record of Decision (ROD) and Land Use
Control/Remedial Design (LUC/RD) documents.
• Complete annual storm water sampling as outlined in the
Long Term Management Plan (LTMgmt).
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BRAC Program Management Office.

10. 2014 Planned Environmental
Activities
QUESTIONS ?
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BRAC Program Management Office.