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St. Paul Island: TPA Site 9c Decommissioned Power Plant
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The Decommissioned Power Plant prior to demolition.
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The electrical power plant at this site operated from 1960 until its decommissioning in November 1998. Three aboveground storage tanks (ASTs) and two 10,000-gallon underground storage tanks (USTs) originally serviced the facility. In 1997, NOAA arranged to remove one UST and closed the other in place. The ASTs were not present on site at the time of the 2002 corrective action, though it is not known when or by whom they were removed.
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The UST located underneath foundation of the Decommissioned Power Plant.
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The corrective action work at the Decommissioned Power Plant was performed in 2002 and 2007. The 2002 activities included removal and decommissioning of a 10,000-gallon UST and excavation of approximately 390 cubic yards of contaminated soils. Soils were transported to NOAA's enhanced thermal conduction (ETC) system for treatment by low-temperature thermal desorption. The 2002 work required the demolition of a portion of the DPP building, foundation, and floor slab to access the tank and surrounding soils.
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The underground storage tank at the Decommissioned Power Plant.
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The 2008 activities included demolition of the remaining portions of the Decommissioned Power Plant building and foundation, followed by excavation of approximately 800 cubic yards of contaminated soils. Soils were transported to NOAA’s landspreading area for disposal. The State of Alaska granted NOAA no further action status for the Decommissioned Power Plant site in 2005 related to the 2002 activities, and again in 2008 related to the 2007 activities.
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Contaminated soils excavation in 2007.
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Downloads
Click on the following link to view the signed copy of the Conditional Closure Request. |
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