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Decontamination, Deactivation, and Demolition

David S. RhodesAcquisition Integrated Project Team Chair

Environmental Management Los Alamos Field Office

March 3, 2015

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Framework for DD&D

Decontamination and Deactivation• Some Technical Area (TA) 21 facilities have been adequately surveyed to allow

demolition debris disposal, while building 257 requires some decontamination and equipment removal

• TA-54 Material disposal Areas –L and –G facilities are in use and decontamination and deactivation needs cannot currently be assessed

Demolition• None of the facilities have reuse potential• All of the facilities have to be removed to allow remediation of subsurface

contaminants or solid waste management units • DD&D is not specifically addressed in Compliance Order on Consent with the

State of New Mexico, however, remediation of sites around and beneath facilities are in Consent Order

• Most facility demolition will fall under DOE’s radiological regulatory authority instead of the State of New Mexico’s hazardous waste regulatory authority

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Three Distinct Areas

Technical Area 21• Small items in-progress such as Warehouse and Sanitary Waste Water Facility• Radiological Liquid Waste Facility

o Basements with tanks insideo Structure collapsing (roof had to be repaired to keep rain out)

• DP West Slabs and contaminated soils beneatho Through slab characterization needed of soilso Soils sampling to depth outside foundation

• Buried waste lines between remaining facilitieso ARRA project did very similar scope three years ago

• Timing is generally open-ended with no long-term programmatic linkageso Timing is determined on available funding and priority relative to other worko Window of opportunity is FY2016 through FY2019

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TA-21 View of Facilities

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Three Distinct Areas

TA-54 MDA-L• Five facilities with slabs and substantial structures• Equipment slabs, carports, and laydown areas• MDA-L area is covered by asphalt

o Well and borehole heads located within the covered area are accessed through man-hole type ports

• Facilities and asphalt are not at consistent elevations with more than a 30-ft change over 400-ft length

• Timing for MDA-L demolition is flexibleo Timing is determined on available funding and priority relative to other worko Wait for completion of soil-vapor extraction, yet not impact operations at MDA-G

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MDA-L Facilities

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Three Distinct Areas

TA-54 MDA-G• Several hard-walled facilities• Dozen steel-framed and fabric-covered domes on concrete slabs

o Several domes have TRU waste processing lines within them• Ancillary support structures• Concrete RCRA pads that are regulated units• Issues

o Current TRU operations utilize the facilitieso RCRA Closures must be coordinated with all permittees (including NNSA)

EM contractors will remove materials from RCRA pads before closure and demolish the pads after closure

EM contractors will integrate/coordinate planning and execution of closureso Timing of demolition requires a high-degree of coordination and phasing as MDA-G

TRU operations complete – no earlier than FY2022 and likely complete by FY2032

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MDA-G Aerial View of FacilitiesMDA-G Aerial View of Facilities

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Dome 231 Box Line & Dome 375 Permacon