SWMU 51 – New AIMD Storage Pad/Building 379

This unit consists of a curbed, concrete storage pad located outside Building 379. This storage pad is roofed and enclosed with a cyclone fence. It was first identified during the 1993 follow-up inspection and was used by the AIMD facilities in place of SWMU 33. Also present at this SWMU is a 200-gallon tank which touches the storage pad, but is outside the curbed area. The entire pad area is surrounded by asphalt pavement. During the 1993 follow-up inspection, large oil stains were observed coming from two drain valves in the curb surrounding this pad and from the 200-gallon tank located outside the pad curb. Because any releases from this SWMU would likely be carried by storm water runoff to unlined drainage features, an RFI for soils at the downslope edge of the asphalt pavement surrounding the SWMU was required in the RCRA permit.

Status

• RFI work plans were approved in 1995.
• Investigations at this unit were performed along with the rest of the OU 1 SWMUs. Minor levels of semi-volatiles were detected; however, the levels were such that no risk was posed to human health or the environment.
• Corrective Action Complete with Controls determination was approved in the January 29, 2007 RCRA § 7003 Administrative Order on Consent.
• Navy issued a Land Use Control letter on July 2, 2007 prohibiting residential land use of the SWMU 51 area.