Under contract with USACE, Weston Solutions, Inc. completed remediation under the former PSB [Public Safety Building] foundation on 21 January 2021 and backfill on 23 March 2021. During foundation excavation, a layer of dark American University Experiment Station (AUES) debris was observed in the slope north, east and west of the PSB foundation. USACE contracted with Weston to investigate the AUES debris extent. Weston completed Rotosonic drilling & test pit investigations on 12 April 2021 to define the extent of the AUES debris layer on the PSB hillside with Unexploded Ordnance (UXO) support ... The Weston Team mobilized to the PSB site at AU during the Labor Day week of September 4, 2023. The Team is currently conducting the remediation.
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... The objective of the PSB hillside remediation is to assess, remove, and dispose of the munitions and AUES-related debris layer under the hillside, with an emphasis on sealed containers and soil contaminated with chemical warfare agents (CWAs), agent breakdown products or contaminants above the Spring Valley screening criteria or Hazard Index. To reach the AUES debris layer under the hillside, Weston will install an active retaining wall system while excavating “clean overburden soil” down to the AUES debris layer ... WESTON and the USACE will be monitoring the site to ensure safety and minimize impacts to the college community and local residents: air monitoring by the US Army Combat Capabilities Development Command (CCDC) for CWA at the site perimeter, in the excavation zone & headspace samples of soil & debris; and air monitoring for metals and organic vapor in the excavation zone and worker’s breathing zone.
USACE
USACE
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