Middle DP Road Site

Middle DP Road Site 

 

This webpage provides updates on the investigation the U.S. Department of Energy’s (DOE) Environmental Management Los Alamos Field Office is conducting of land parcels along DP Road where historical materials from Los Alamos National Laboratory were found in 2020. The purpose of the investigation is to gain confidence that radioactively contaminated debris will not be encountered during future development of the land parcels owned by Los Alamos County.

See the Project Updates section for the latest reports from the field. See the Background section for a description of the issue and previous work completed.

Updates

April 29, 2021

Work continued this week investigating the Middle DP Road (MDPR) site. About 30 percent of the planned sampling locations have been investigated and no contaminated debris has been discovered. Workers also completed marking all sampling locations and completed a housekeeping sweep of the MDPR site.

April 28, 2021

This week, N3B began shipping containers of low level radioactive waste originating from the Middle DP Road (MDPR) site to the Waste Control Specialists (WCS) site in Texas for permanent disposal. Each container consists of about 16 cubic yards of soil removed from the MDPR site during the 2020 investigation and installation of utilities.

April 15, 2021

Field work began at the Middle DP Road (MDPR) Site on April 15. To help gain confidence that radioactively contaminated debris will not be encountered during future development, N3B will investigate about 124 sites. Investigation activities will include excavation, cleanup and sampling. Click “Read More” to view a map of the MDPR Site.

April 9, 2021

Beginning the week of April 12, the Los Alamos residents should expect to see increased truck traffic as N3B begins an environmental investigation of two land parcels on the south side of DP Road.

April 5, 2021

The New Mexico Environment Department has approved the work plan for investigating the Middle DP Road (MDPR) Site. The work plan, Solid Waste Management Unit Assessment Work Plan for Middle DP Road Site, Revision 1, lays out the work to be done at MDPR, as well as background and history.

Background

The property where the sampling work is being conducted was part of Los Alamos National Laboratory (LANL) Technical Area 21 (TA-21), which was used decades ago for the production and purification of plutonium and polonium. The investigation is focusing on portions of two land parcels on the south side of DP Road: A-16-a and the adjacent A-8-a, both of which are now owned by Los Alamos County (LAC). The area of investigation is known as the Middle DP Road Site.

In early 2020, excavation work for a new LAC sewer line unearthed unexpected radiologically contaminated materials of LANL origin close to the western boundary of land parcel A-16-a. Later in 2020, additional contaminated materials were found on A-16-a and the adjacent land parcel A-8-a. Subsequent to each discovery, the excavation sites were placed in a safe configuration and samples of the contaminated debris were removed from the site and analyzed.

Samples of debris showed radiological contamination adhered to the debris with little to no transfer to the surrounding soils. The contamination was identified as very early Manhattan Project uranium and plutonium.

In August 2020, N3B conducted trench work on the eastern portion of the adjacent land parcel A-8-b, which is owned by Bethel Corporation. No contaminated debris or debris of LANL origin was found during the trench work. To gain further confidence that radioactively contaminated debris would not be encountered during future development of the land parcel and out of an abundance of caution, N3B conducted 16 additional localized excavations across A-8-b in December 2020. No contaminated debris or debris of LANL origin was found.

The results from the trenching effort and localized excavations on A-8-b and the uncommon nature of the plutonium and uranium contamination debris of LANL origin found on the Middle DP Road Site have helped guide the investigation approach that is being used.

The purpose of the investigation of the Middle DP Road Site is to determine the extent of possible additional contamination on these two land parcels and to remove the contamination that has already been discovered. Project work includes air monitoring, site inspections, investigation implementation, soil and debris sampling, contaminated debris removal, where possible, waste disposition, reporting, and stakeholder interaction.

The investigation field work on the Middle DP Road Site started on April 15, 2021, and is expected to conclude in late fall 2021.

Middle DP Road Site Photo & Map Gallery

The photos and maps below show work being done by N3B along DP Road.

Map of Middle DP Road Site
Spraying water on soil
Spraying water on soil
Depositing dirt into bin
Monitoring soil
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Frequently Asked Questions

When and where along DP Road was contamination discovered?

In February 2020, a contractor conducting work along DP Road on land that formerly was part of Los Alamos National Laboratory (LANL) found unexpected material. The material was analyzed and determined to have originated during the Manhattan Project Era. Out of an abundance of caution, and in partnership with Los Alamos County, the Department of Energy (DOE) undertook excavation work along DP Road. Contaminated materials were found on two land parcels: A-16-a and A-8-a. The materials were discovered about 200-400 feet south of DP Road, across from the western most portion of the existing businesses and on lands further to the west. See this map of the area. 

What was found on these parcels? Did DOE dispose of the materials?

Radiologically contaminated materials of LANL origin that were found included metal items, debris and glass. These contaminated materials were packaged and safely shipped off-site for proper disposal.  In another excavation, a yellow soil-like substance was uncovered that was determined to be oxidized processed uranium, which was placed in a safe configuration until a proper investigation was implemented. The excavation sites were fenced off, and signs marking the presence of radioactive materials were posted.

Why is DOE conducting field work on DP Road? When will the work start?

As noted above, in 2020, contaminated materials of LANL origin were found on two land parcels along DP Road. DOE is conducting potholing and associated sampling on the two land parcels to gain confidence that radioactively contaminated debris will not be encountered during future development on both parcels. The safety of the community and the environment are of the utmost importance.

The field work is scheduled to be begin in April 2021, and last several months.

What will DOE do if more contamination is found?

If any contaminated materials are found, DOE will determine nature and extent and remove. It also will sample the excavations to verify no contamination remains. Depending on the extent of contamination, DOE will determine if any remediation is necessary. All work will be conducted safely to protect workers, neighboring businesses and the public.

Will this work affect businesses along DP Road?

We are working with the local developer, DP Road businesses and LAC to minimize impacts to access. We expect a slight increase in truck traffic, but nothing that would impact access to local businesses.

Was any contamination found where housing is being developed?

No. Following the discovery of materials on parcels A-8-a and A-16-a, DOE sampled the adjacent land parcel A-8-b, site of a future housing development. The intent was to gain further confidence that contaminated debris would not be encountered during development activities. The sampling on A-8-b was completed in December 2020 and no contaminated materials were found.  Development on the land parcel began.

Is DOE coordinating this activity with Los Alamos County? How about with the New Mexico Environment Department?

Yes. DOE is working with Los Alamos County and the New Mexico Environment Department (NMED) to ensure the fieldwork is done in a safe, effective, timely, and compliant manner. The assessment work plan that DOE is using on the two land parcels was reviewed and approved by NMED. DOE has provided regular updates to Los Alamos County on field work related to DP Road and will continue to do so. DOE also shares monitoring data with Los Alamos County as appropriate.

How long will it take DOE to clean it up?

Sampling on the land parcels A-8-a and A-16-a is expected to take several months. The results of the field work will determine what additional activities may be required and how long they will take.

How do we know that this additional screening will find all possible contamination on DP Road?

The assessment work plan approach has been statistically designed to maximize the likelihood that contaminated materials, if present, will be found.

Email

N3BOutreach@em-la.doe.gov

Address

N3B Los Alamos
1200 Trinity Drive
Suite 150
Los Alamos, NM 87544

Phone

(505) 257-7690

Contact N3B

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