SWMU 23 – Oil Spill Separator Tanks

This unit consists of three rectangular steel, oil/water separator tanks underlain by a curbed, concrete pad. This SWMU is located approximately 100 feet inland from the Fuel Pier, and is partially surrounded by asphalt pavement. These tanks act as first stage; gravitational oil/water separators, where bilge and ballast water, and oil/fuel/water mixtures from spills are emptied from the SWOBs and “donuts” (SWMUs #21 and 22). During both the 1988 VSI and the 1993 follow-up inspection, the concrete pad and adjacent areas of asphalt pavement and soil were heavily stained. A first phase RFI for the soils surrounding the unit was required in the permit. A groundwater investigation based upon the soil sampling results would be required if needed.

Status

• RFI work plans were approved in 1995.
• Investigations at this unit (a part of OU 1) were performed in accordance with the approved RFI work plans.
• No evidence of release was seen.
• 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 23 area.