Waste reduction by separation of contaminated soils during environmental restoration Page: 1 of 14
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Title: Waste Reduction by Separation of Contaminated Soils during
Environmental Restoration I g a
Authors: J. Anthony Roybal, Sandia National Laboratories
email@example.com (E); (505) 284-2475 (P); (505) 284-2616
Rarilee Conway, Sandia National Laboratories
firstname.lastname@example.org (E); (505) 284-2547 (P); (505) 284-2616
Bob Galloway, Sandia National Laboratories GECE VED
email@example.com (E); (505) 844-0922 (P); (505) 284-2616 81998
Erne Vinsant, Sandia National Laboratories aT
firstname.lastname@example.org (E); (505) 284-2507 (P); (505) 284-2616 0
Paula Slavin, GRAM, Inc.
email@example.com (E); (505) 284-2496 (P); (505) 284-2616
David Guerin, Technadyne Engineering Consultants, Inc.
firstname.lastname@example.org (E); (505) 284-2565 (P); (505) 284-2616
Keywords: Environmental Restoration, ER, Pollution Prevention, P2, Soil Separation,
SGS, LAGS, Waste Reduction.
During cleanup of contaminated sites, Sandia National Laboratories, New Mexico (SNL/NM)
frequently encounters soils with low-level radioactive contamination. The contamination is not
uniformly distributed, but occurs within areas of clean soil. The standard protocol is to excavate
the entire volume of soil within the boundary of the contamination. This practice results in the
commingling and disposal of clean and contaminated material as low-level waste (LLW) , or
possibly low-level mixed waste (LLMW). To reduce the amount of LLW and LLMW generated
during the excavation process, SNL/NM is evaluating two alternative technologies.
The first of these, the Segmented Gate System (SGS), is an automated system that locates and
removes gamma-ray emitting radionuclides from a host matrix (soil, sand, dry sludge). The
matrix material is transported by a conveyor to an analyzer/separation system, which segregates
the clean and contaminated material based on radionuclide activity level. The SGS was used to
process radioactively contaminated soil from the excavation of the Radioactive Waste Landfill
(RWL), ER Site #1, located in Technical Area II (TA-II), and the Open Dump site at Arroyo Del
Coyote, ER Site #16. Partial funding ($60K) was obtained from the DOE high Return on
Investment (ROI) program to demonstrate the technology at Site #1. Of the 1,270 cubic yards
of contaminated soil processed at Site #1, 70.5% was released at clean fill, avoiding $884,000 in
disposal costs. (Implementation costs were $200,000). Of the 661 cubic yards processed at Site
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the Unite
States Department of Energy under Contract DE-AC04-94AL85000.
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Roybal, J.A.; Conway, R.; Galloway, B.; Vinsant, E.; Slavin, P. & Guerin, D. Waste reduction by separation of contaminated soils during environmental restoration, article, June 1, 1998; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc701924/m1/1/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.