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and asphalt pads, and materials used in equipment and building construction (aluminum, steel, galvanized and tar-paper roofing, glass, brick, stucco, wood, etc.).

Methods of soil decontamination and fixation included wetting, oiling, leaching and stabilizing agents, and spraying with fire-fighting foam, as well as disking, plowing, and scraping. The top two inches of soil was scraped and hauled away for burial at the NTS. The ground was plowed to a depth of 12 inches. Rad-safe technicians decontaminated test materials by washing, steam cleaning, and vacuuming.

Contaminated equipment was disposed of in waste burial sites adjacent to Valley Road within Area 13.

Radiation safety procedures

This map shows the location of Project 57 ground zero (GZ) and the fence surrounding the Alpha Contaminated Zone.

Reynolds Electrical and Engineering Company (REECo) provided operational radiation safety support for Project 57. Prior to the day of the test, REECo personnel erected a temporary decontamination facility at the entrance to the access road to ground zero. It was stocked with supplies of radiation detection instruments, protective clothing, and other equipment.

The building also contained an equipment issue room, showers, and a dressing room. All personnel entering or leaving the contaminated zone had to pass through the Rad-Safe building. Containers were made available to dispose of contaminated clothing. Northwest of the building, a parking area was established for contaminated vehicles. Uncontaminated vehicles parked on the south side of the building. There was also an area for processing fallout trays and soil samples for shipment to Sandia Corporation for analysis.

To protect workers at Area 13 against the hazards of plutonium inhalation, personnel were required to wear full protective clothing with all openings taped to their skin and full-face respirators with high-efficiency filters. Heavy respiratory protection made breathing difficult

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