Moffet Field RAB Hangar 1 Update
-
Upload
steve-williams -
Category
Education
-
view
1.985 -
download
3
description
Transcript of Moffet Field RAB Hangar 1 Update
1
Hangar 1 Navy UpdateHangar 1 Navy Update
Restoration Advisory BoardRestoration Advisory BoardFormer NAS Moffett FieldFormer NAS Moffett Field
May 13, 2010 May 13, 2010
Kathryn Stewart, PEBRAC Environmental Coordinator
BRAC Program Management Office West
2
Background Background –– Former NAS Moffett FieldFormer NAS Moffett Field
• Commissioned in 1933• Recommended for closure
in 1991• Transfer to NASA in 1994
– 1992 MOU• Navy responsible for
environmental restoration
Navy Photo
3
Hangar 1Hangar 1
• Built in 1932 to house airship U.S.S. Macon
• 1,133 ft long, 308 ft wide, 198 ft high
• Contributing element to NAS Sunnyvale, CA Historic District
• Individually eligible for National Register
• Designated a “Navy historic site”
• Civil Engineering Landmark of Northern CA
Navy Photos
ChronologyChronology
• 1997- PCB contamination discovered in sediment
• Subsequently found in stormwater samples
• Determined a source was Hangar 1 in 2002
• Need to address source
4
Navy Photos
5
ChronologyChronology
• PCBs and asbestos within metal siding
• Metal siding and interior structure also painted with paint containing lead and PCBs
• Hangar closed for use in 2002 Navy Photo
6
Cleanup ChronologyCleanup Chronology
• Identified as a CERCLA site, IR Site 29, in 2003
• Time Critical Removal Actions conducted in 2003– Cleaned out storm drain
sediments– Coated hangar with asphalt
emulsion
• Proceeded with Non-Time Critical Removal Action in 2005
Navy Photo
Engineering Evaluation/Engineering Evaluation/Cost Analysis (EE/CA)Cost Analysis (EE/CA)
• EE/CA drafted in May 2006– Recommended demolition
• Public Meeting – Late May 2006
• Structural Analysis and Seismic, Wind, and Gravity Study (July 2008)
• Revised EE/CA – July 2008• Public Meetings- Aug & Sep
2008
7
Source: Moffett Users Website, www.nuqu.org
8
Action MemorandumAction Memorandum
• Action Memorandum –December 2008
• Selected Alternative 10– Remove siding and
coat exposed surfaces• Contract awarded 25
September 2009– $22.3M
9
ScheduleSchedule
• Work Plan approval Spring 2010• Start interior abatement/demolition Late Spring 2010• Start siding removal Winter 2010• Complete siding removal and coating Fall 2011• Complete confirmation sampling Fall 2011• Submit final report Winter 2012
10
Other Considerations: HistoricOther Considerations: Historic
• National Historic Preservation Act– Section 106
• Coordination with Advisory Council on Historic Preservation (ACHP) and State Historic Preservation Office (SHPO)
• Removal Action Mitigation Measures– HAER documentation– Interactive CDs, Oral Histories– Preservation of Man Crane, etc.– Does not include re-siding
• Two undertakings– Navy’s Removal Action– NASA’s Reuse
Navy Photo
11
Other Considerations: ResidingOther Considerations: Residing
• OMB Arbitration concluded March 2010– Navy - environmental cleanup actions– NASA - Hangar 1 reuse and residing
• Navy and NASA working together to determine the most appropriate path forward
• Investigating options for coordination• Recent Discussions – 27 April 2010• Recent Navy Correspondence
– To determine feasibility of combining under one contract, need plans, specs, funding
– Requirement for cleaning prior to new construction– Cannot delay removal action - interim coating showing signs of
failure– Lack of immediate plan not detrimental to Hangar frame
Other Considerations: Other Considerations: Deterioration/BirdsDeterioration/Birds
• Deterioration-– Structure in sound
condition– Coating service life of 20+
years– Proven at Vandenberg
launch tower– Routine inspection and
maintenance
• Roosting nest/bird air strike hazard-– BASH Mitigation– Temporary and permanent
12
Photo of Hangar 1 Construction
Other Considerations: BiologicalOther Considerations: Biological
• Migratory Bird Treaty Act
• Burrowing Owl
13
Other Considerations: Items for DeconOther Considerations: Items for Decon
• Navy allotted $75K in contract for decon of items identified by NASA
• List submitted by NASA and reviewed by contractor
• Includes various types of items
14
15
Contact InformationContact Information
Kathy StewartBRAC Environmental CoordinatorBRAC Program Management Office West
Navy Caretaker Site Office1 Avenue of the Palms, Suite 161Treasure IslandSan Francisco, CA 94130-1807
Phone: (415)743-4715Fax: (415)743-4700
E-mail: [email protected]
Backup Information
16
Interim CoatingInterim Coating
17
Interim CoatingInterim Coating
18
36,000 ppm PCBs119 ppm PCBs
PCBs in SedimentPCBs in Sediment
19
Upland PCBsUpland PCBs
• Navy addressing upland PCB Sources
• Aroclor 1260 • No Aroclor 1268
found
20