Problems/Comments

Groundwater Zone 5 (OT31). AK Circle Landfill Former base landfill operated from the mid-1950s to late 1960s. Materials disposed included drums of unknown contents, shop waste, and construction debris. The following investigation summary was taken from the Final 2014 Remedial Action Construction work plan. During excavation activities in October 2009, a buried drum was found less than 6 inches below the ground surface adjacent to the excavation at LF006 Area E (PVS, 2010). The location was approximately 94 feet east of monitoring well CLF-MW02. The drum contents were characterized, removed, and disposed of. The drum was excavated, cleaned, and disposed at the local landfill. After excavating the drum, four more drums were identified adjacent to the one removed. In 2010, four of the identified drums and 1 additional drum were removed from this location. Three of the 5 drums had liquid contents, which were characterized and disposed of. The drums were cleaned, crushed, and taken to the local landfill for disposal. While excavating the 5 drums, an additional one was hit by the bucket of the excavator, creating a 10 inch diameter hole near the rim of the drum. The drum had approximately 5 to 10 gallons of contents, which remained confined inside the drum. The contents were sampled and characterized. A field team returned during the 2011 field season and successfully transferred the drum contents to a new drum. The contents were characterized and disposed of. The buried drum was removed from the ground, cleaned, crushed, and taken to the local landfill for disposal. One soil sample was collected in 2010 from where one of the removed drums was located. This sample was not part of the approved Work Plan, but was collected to get basic information on potential contamination of the soil surrounding the drums. The sample was sent to the project laboratory in Anchorage and analyzed for GRO, DRO, RRO, VOCs, and PAHs. Only concentrations of DRO and RRO exceeded the RAOs at this site. The concentrations were 7,700 and 50,000 mg/kg, respectively. After the six drums were removed from the site, ten additional drums were observed partially buried in the excavation. The orientations of the drums were random and the presence of liquid contents in the drums is unknown. The 10 x 6 x 3 ft depression remaining after the drums were removed was lined with plastic sheeting and backfilled with clean soil from the site. Holes were made in the bottom of the plastic sheeting to allow water to pass through. Two survey stakes were inserted to mark the north and south ends of the long axis of the depression (Points A and C, respectively). One stake was also inserted to mark the middle of the eastern edge (Point B). Swing ties were taken for each point using monitoring well CLF-MW02 to the west and power pole 47 to the north. The swing tie measurements from the power pole and monitoring well to each point are 90 and 95 feet to Point A; 98 and 94 feet to Point B; and 106 and 84.5 feet to Point C, respectively. AF point of contact: Charley Peyton, Project Manager, 611th CES/CEV 10471 20th Street Suite 338, Elmendorf AFB, AK 99506-2270; Telephone 907-552-9765.

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No associated sites were found.