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Moffett Field - Hangar 1

Information Update

Moffett Field, California January 2010

The Department of the Navy is implementing a CERCLA removal action to control migration of PCBs from Hangar 1 to the environment. Hangar 1 is located at the former Naval Air Station Moffett Field.

Hangar 1 has a rich history in the region and to the aeronautical world as a whole.

The Navy will make every attempt to salvage and preserve artifacts identified for historical purposes. Items identified for decontamination will be returned to NASA for storage or future use. Some of the items that have already been identified for preservation are the man cranes, the "clam shell" doors/motors and the holiday star. In addition, the color of the new coating will match the existing color of the structure. Lastly, the contractor will create a video documenting the progress of the remedial action and donate the final product to the Moffett Field Museum. These efforts are in addition to completing the Historic Architectural Buildings Survey/Historic American Engineering Record (HABS/HAER) documentation and preparing an interpretive CD containing archival photographs and oral histories.

Work Plan approval Start interior abatement/demolition

Start siding removal

Complete siding removal and coating Complete confirmation sampling

Submit final report

Summer 2010

Winter 2010

Summer 2011

Winter 2012

Legend

What's Happening at Hangar 1

The Department of the Navy (Navy) is implementing a Comprehensive Environmental Response Compensation and Liability Act (CERCLA) removal action to control migration of polychlorinated biphenols (PCBs) from Hangar 1 to the environment. Hangar 1 is located at the former Naval Air Station Moffett Field (Moffett Field).

Site Boundary Fence Surface Water Diversion BMP Partial Road Closure Traffic Revision Ahead FOD Containers Truck Routes In-Bound

F B G C E A A D F

Out-Bound Obstruction Fabric Wind Direction Portalets

A B

A F

A B

Equipment Laydown Area Worker Break Trailers/Parking Water Management Area

Removal action includes: ·Demolitionordeconstructionandoff-sitedisposal and/or recycling of all interior structures ·Removalofthehangarsidingandroofing Site Plan ·Removalofalldebristoappropriateoff-site U.S. Department of the Navy AMEC Earth & Environmental disposal or recycling facilities BRAC PMO West San Diego, California Inside Prevention Plan the Hangar ·Applicationofaweather-resistantepoxycoating Accident Anextensivescaffoldingsystemwillbeerectedinsidethe to the hangar's structural steel frame Hangar 1 Site Detail Map hangarsoasmuchworkaspossiblecanbeperformed 3 ·Implementationofhistoricmitigationmeasures whilethesidingremainsintact.Thisapproachisoneway to promote safety and containment of emissions during The Navy understands the unique challenges and demolition,andallowsafeaccesstothesidingandrooffor constraintsassociatedwiththisproject,andistaking washingandcoating. a careful and methodical approach to implementing theremovalaction.Thesemeasureswillpreserve Because the interior of Hangar 1 is made up of several levels thehangarasahistoricresourcewhileprotecting ofoffices,shopsandotherfacilities,differentmethodswill human health and the environment. The remaining be used to demolish each level to ensure the main structural structurewillprovidetheopportunityforpotential systemofthehangarwillnotbedamaged.Forexample, futureadaptivereusebythecurrentowner,theNational demolitionofthelowerlevelstructureswillbecompleted Aeronautics and Space Administration (NASA). usingspecialtyequipment,while thesecondandthirdlevelswill becompletedprimarilybyhanddemolition methods.

D E F Truck/Equipment Decon Area Fixed Air Monitoring Location Command Post G

F

C

Overflow for Waste Managemen

0

300

600 Feet

9210 Sky Park Court, Suite 200 San Diego, California 92123

DWN BY:

DATUM:

DATE:

Non-Time-Critical Removal Action For PCB Contamination at Site 29, Hangar 1 Former Naval Air Station Moffett Field Moffett Field, California

TND

NAD83

December 10, 2009 8151020005

CHK'D BY:

REV. NO.: SCALE:

PROJECT NO.:

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PROJECTION:

FIGURE NO.:

UTM

1 inch = 300 feet

Followingdemolition/ deconstruction of the internal structures,thehangarwillbedivided intosix,216-foot-wideworkzones for siding removal and steel frame coating.Eachzonewillundergothe followingfourphasesofremediation: 1.Pressurewashtheinteriorhangar surfaces,includingsidingand structuralsteel, 2.Applycoatingtostructuralsteel andconcretestructures, 3.Removeroofingandsiding,and 4.Applycoatingtonewly-exposed outersteelsurfaceswithrollersor brushes.

Workwillprogressfromonezonetothenext,starting onthesouthendofthehangar,sothatthenorthend willprovideprotectionagainsttheprevailingwindsas demolition progresses. Once all demolition and coating workhasbeencompleted,theremainingconcretefloor willbethoroughlycleanedbypressurewashing.

About CM15

This coating is particularly well suited for over-coating existing paint because it can penetrate through rust better than other coating products and contains a low solvent content that will not soften the existing paint. The coating has a proven performance record in providing long-term effectiveness and is expected to effectively encapsulate the contaminants on the steel structure for a minimum of 10 years with minimal maintenance. Additionally, CM15 coatings have performed well for over 20 years in similar environments at other sites.

Long-term Protection

Oncetheinteriordemolitioniscomplete,allaccessible steelinthehangarwillbepressurewashed.Pressure washingwillbeconductedandthecoatingwillbe appliedwhiletheexteriorsidingisstillinplace. Leavingtheexteriorsidinginplacebothcontainsany dust inside the structure and eliminates any coating spray from leaving the site. Afterthesurfacesarepressurewashed,theywillbe inspectedforcleanlinesstoensurethenewcoatingwill properlybondtothestructure.Aweather-resistant epoxycoatingsystemcalledCarbomastic15(CM15)

Roof and Siding Removal

Roofandsidingremovalwillbedonemanuallyfromtop tobottom,andfromtheeastandwestsidesconcurrently. Theexistingupperroofingmaterialswillberemoved usinghandtools,bundled,andloweredthroughopenings tothehangarfloorbelow. The individual side panels willbeunboltedfrom insidethehangarandwill thenbecarefullylowered andpackagedinsidethe hangar. The Federal Aviation Administration navigation beacons and holiday star onthehangarroofwillbe maintained,accessibleand functional during remediation activities.

Work Zones

Coating the Hangar's Exterior

Aftertheroofandsidingareremoved,theexteriorsteel U.S. Department of the Navy BRAC PMO West frameofthehangarwillalsoreceiveaCM15epoxycoating. San Diego, California Theexteriorsteelsurfaceswillbescraped,wipedcleanand inspectedpriortoapplicationoftheCM15coating,which willbeappliedbyhandusingrollersandbrushes.

8151020005

AMEC Earth & Environmental

9210 Sky Park Court, Suite 200 San Diego, California 92123

Non-Time-Critical Removal Action For PCB Contamination at Site 29, Hangar 1 Former Naval Air Station Moffett Field Moffett Field, California

willbeappliedusingairlesssprayequipment.This workwillbecompletedwithinthecoveredhangarin Decontamination sections beforeand Demolition Plan is removed. the siding

DWN BY:

DATUM:

DATE:

TND -

-

December 10, 2009

CHK'D BY:

REV. NO.:

PROJECT NO.:

SCALE: FIGURE NO.: Do Not Scale

Qualitycontrolforthecoatingapplicationwillinclude adhesiontestsandmeasurementofthewetand drythicknessofthecoatingafterapplicationtothe structuralsteel.Inspectionswillbemadebyinspectors whoarecertifiedbytheNationalAssociationof Corrosion Engineers (NACE) and/or Society of Protective Coatings (SSPC).

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Work Zones for NTCRA Activities at Hangar 1

PROJECTION:

2-1

Ensuring Environmental Integrity

TheNavyiscommittedtosustainabilityandreusewherever possible.Inadditiontominimizingenvironmentalimpacts duringthedemolitionandcoatingprocesses,theNavy willimplementrecyclingefforts,safedisposalmethods andrigorousqualitycontrolateverystep.Insidethe hangar,someNASAfurnishingsandequipmentwillbe decontaminatedandre-used,andnon-hazardousmaterials

willberecycledtothemaximumextentpractical. Alldemolitionwasteswillbetransportedoffsiteby registeredhaulersincoveredtrucksforrecyclingor disposalatpermittedlandfills.Wherepossible,waste haultruckswillbepoweredwithbiodieselfuel to promote environmental sustainability.

Protecting Your Health

Protecting human health and the environment throughout the remediation activities is a top priority fortheNavy.Toprovideasecureworkareaduringfield activities,theentiresitewillbesurroundedbychainlinkconstructionfencing.Thesecuredareawillinclude abufferzonetoensurethatthepublicisprotected fromtheconstructionactivities.Thefollowing additionalsafetymeasureswillbetakentoensurethat workers,NASAemployeesandtenantsandthepublic areprotectedagainstdustemissionsandotherhazards that could be generated during demolition.

Air-Monitoring Program Arigorousair-monitoringprogramwillbe developedtomakesurethatworkersandthe publicarenotexposedtounsafeairemissions. Fromtheearlystagesoftheproject,anair- monitoringprogramwillbeinplacetoprovide continuous,real-timeperimeterdustmonitoring intheworkzone.Threedust-monitoringstations willbeinstalled:oneupwindandtwodownwind ofconstructionactivities.Sitepersonnelworking abovegroundlevelwillwearpersonaldust monitorsfortheirownsafety.Thesepersonal monitorswillserveasafirstindicatorofany potentialairborneemissions,beforecontaminants wouldbetransportedoffsite.Ifdust-monitor alarms sound or personal monitor action levels are exceeded,workwillbehaltedanddust-mitigation actionswillbetaken.Additionalchemical-specific airmonitoringwillbeconductedtoverifythe effectivenessoftheair- monitoring program. Dust Control The contractor's demolition methods have been designed tominimizethepotential for generating airborne particulatesinthework area.Bundlingandlowering roofingandsidingmaterials willbedoneinsidethe hangar to provide better dustcontrol.Operationswill beadjustedduringperiods ofhighwindtomaintain optimal dust control. Water sprayandmisterswillbe used to control dust at the sourcetominimizefugitive emissions.Ifneeded,the fencedelineatingtheworkareawillalsobecovered as an additional dust control measure. Storm Water Management Stormwaterrunonandrunofffromthesitewill be controlled and the storm drain trench surroundingthehangarwillbeisolatedtoprevent unintendeddischargeofstormwaterorwash waterfromthesite.

Baseline and Confirmation Sampling Baselinesamplingwillbeconductedtoevaluateand documentthepre-constructionconditionofsoil, sediment and air quality at the site. After the removalactioniscomplete,confirmationsamples willbecollectedtoverifythattheremediationprocess has not generated any additional contamination and that the remediation goals have been met.

Waste Management Allwastematerialswillbesegregatedbyindividual wastestream,characterized,andproperlypackaged fortransportanddisposaloffsite.Allwastewater generatedduringtheremovalactionwillbe captured,stored,andtreatedinanon-sitewaste watermanagementsystem.Thetreatedwaterwill beanalyzedtoensurethatitisfreeofcontaminants andthenre-usedtotheextentpossibleforon-site constructionactivities,likepressurewashingand dust control. Airfield Protection ABirdAirStrikeHazard(BASH)MitigationPlan willbedevelopedandimplementedtoprevent birds from using the hangar for roosting or nesting andposingahazardtoaircraftatMoffettField.

Working with NASA Ames Research Center Personnel

TheNavyrecognizesthatHangar1andthisproject areofparticularinteresttomanystakeholders­ particularlythosewhoworkatNASAAmesResearch Center(ARC).BecauseoftheproximityofNASAARC buildingstoHangar1,theNavyhasidentifiedways tominimizetheconstructionimpactstopersonnel whoworkinthevicinityoftheproject. ·Theaveragetrucktrafficwillbearoundfive trucksperdayandwillnotexceed20trucksper dayatthepeakofconstruction ·Truckswillbeenteringandexitingtheproject site area through the Ellis Gate ·Therewillbenoroadclosuresandpartial laneclosureswillbelimitedtotheimmediate vicinityofthehangarallowingaccesstoall surrounding facilities ·Allvehiclesleavingthesitewillgothrougha decontamination process to ensure they are not carrying contaminants out of the construction site ·Mostworkwillbecontainedwithinthehangar untilwinter2010

Traffic Control Plan

Keeping You Updated

TheNavywillcontinuetoprovideinformation about the demolition and removal of contaminated siding and coating of the structural steel frame. This willincludefutureNASAARCpersonnelbriefings andNavy-sponsoredRestorationAdvisoryBoard (RAB)progressupdatesatprojectmilestonessuch asworkplancompletion,mid-pointofconstruction andconstructioncompletion.Inaddition,the Base Realignment and Closure (BRAC) Program ManagementOffice(PMO)WestMoffettFieldWeb sitewillbeupdatedtoprovideprojectinformation. Formoreinformation,pleasecontact: KathrynStewart,P.E. BRAC Environmental Coordinator (415)743-4715 [email protected]

Visit the Moffett Field Web page at www.bracpmo.navy.mil/basepage.aspx?baseid=52&state=California&name=moffett

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