Former NAS Moffett Field

Hangar 1 Removal Action UpdateHangar 1 Removal Action UpdateHangar 1 Removal Action UpdateHangar 1 Removal Action Update

Bryce Bartelma, PGNavy BRAC PMO West

May 12, 2011RAB Meeting

1

Presentation Overview

P j t Obj ti• Project Objective• Progress Update

Biological Monitoring Scaffolding Installation Biological Monitoring Storm Water Protection Air Monitoring Hi t i Miti ti

Scaffolding Installation Roof, Redwood, Siding &

Window Removal Washing & CM15 Coating Historic Mitigation

Structural Steel Repairs

• Future Activities

Washing & CM15 Coating

• Schedule• Questions

2

Project Objective

• Control release of PCBs from Hangar 1 in accordance with EE/CA (July 2008) and Action Memorandum (December 2008)(December 2008)Demolition of interior structuresRemoval of contaminated sidingRemoval of contaminated sidingApplication of weather-resistant coating to steel frame

3

Continued Biological Monitoring

• Weekly observation of Burrowing OwlsI ti f bi l i l ti it i id• Inspection of biological activity inside and outside of hangar

• Weekly reports to NASA and regulatorsWeekly reports to NASA and regulators• No observed impacts to protected

species

Owl Buffer Fence

4

Continued Storm Water Protection

S di t d• Sediment removed from storm water trench and pluggedp gg

• Plastic liner placed over bare soil areas

l b l d• Silt barriers placed around storm drains

• Paved areas• Paved areas vacuumed prior to storm events

5

Continued Air Monitoring

• Continuous air monitoring during• Continuous air monitoring during removal action activities

• Three levels of air monitoringW k– Workers

– Work areas– Site perimeter

• Monitoring coordinated with NASA• Weekly reports provided to agencies

and public p• Data demonstrates control of air

emissions• NASA conducting air monitoring at

6

NASA conducting air monitoring at nearby buildings

Turnover of Historic Artifacts to NASA

7

Hangar 1 Interactive CD

• Provides interviews andProvides interviews and narrated history

• Navy and NASA working together to develop final CD

• Copies to be available to• Copies to be available to RAB, local schools, and library. Additional copies

il bl f havailable for purchase from the Moffett Field Museum

8

Structural Steel RepairsStructural Steel Repairs

• Structural engineers inspectStructural engineers inspect and document missing steel

• Replaced 5 steel members• Inspected by Navy, Exeltech

and AMEC on 2/28/11

9

Scaffolding InstallationScaffolding Installation

10

Quick DeckQuick Deck®® –– Suspended ScaffoldSuspended Scaffold

• Stable platform for workers to access upperworkers to access upper roof area of hangar

• Better control of contaminants (use of plastic sheeting)

11

Swing StageSwing Stage®®

• Added safety measure allowing two additional workers to assist interior workers with removal ofworkers with removal of panels, redwood, and windows

l l d• Materials are lowered to ground for ultimate disposal off-sitep

• Wind screens and monitors, air samplers & BMPs at g o nd s face

12

BMPs at ground surface

Mansard Roof Panels, Redwood Decking, Mansard Roof Panels, Redwood Decking, and Silver Siding Removaland Silver Siding Removalgg

• Mansard RoofFi t d l• First mansard panel removed from Zone 1 on April 21p

• Redwood decking and silver siding removal

13

Damaged Corrugated WindowsDamaged Corrugated Windows

• NASA determined windows not feasible to keep due to deteriorating conditionkeep due to deteriorating condition

• Navy will salvage a small number of corrugated window panes that are in good g p gcondition for NASA

14

Washing & Coating Washing & Coating –– CarbomasticCarbomastic 1515

• Initiated Zone 1 washing and icoating

• Capture and treatment of wash water containing PCBwash water containing PCB dust

• Single application of 4-6 mils f d bof CM 15 provides better

service life and encapsulation propertiesp p

15

Future Activities

• Continued biological & air monitoringmonitoring

• Scaffold installation in northern zones

• Continued siding removal, hi f t l dwashing of steel and

coating • Continued Community

16

Continued Community Outreach

ScheduleSchedule

• Fieldwork in zones 1 – 6 OngoingC l t fi ld k• Complete fieldwork, confirmation sampling and demobilize Early 20122012

• Submit After Action Completion Report p pSpring/Summer 2012

17

Questions?

Point of Contact:

Scott Anderson, P.E.BRAC EnvironmentalBRAC Environmental

Coordinator(619) 532-0938( )

scott.d.anderson@navy.mil

18