Twin Cities Army Ammunition Plant 2007 Remedial Actions at TCAAP Site C...
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Transcript of Twin Cities Army Ammunition Plant 2007 Remedial Actions at TCAAP Site C...
Twin Cities Army Ammunition Twin Cities Army Ammunition PlantPlant
2007 Remedial Actions at TCAAP
Site C Excavation/Stabilization/Disposal of Contaminated Soils, Placement of Soil Covers, and Construction of Replacement
WetlandU.S. Army Corps of Engineers
Shaw Environmental, Inc.
Site C-2 Remedial ActionSite C-2 Remedial Action
Work Plan Clarification (WPC) No. 41 – Borrow soils sampling and excavation plan.
Construction Start Date – 7/16/07. Excavation/Stabilization/Disposal of contaminated soils from
63 grids at Site C-2. Placement of approximately 38,000 cubic yards (cy) of fill
material and 5,000 cy of topsoil for the soil cover construction (58 Grids and portions of the ditches required a minimum of 4 feet of soil cover due to contamination remaining in place).
WPC No. 42 – Over-excavated soils. Construction of a Replacement Wetland located north of Site
C-2 (~2 acres).
Site C-2 Remedial ActionSite C-2 Remedial Action
WPC No. 43 – Burn Area.
Excavation/Stabilization/Disposal of ~200 cy of contaminated soil at the southern end of the wetland.
Final Survey
Construction Completion Date - 10/5/07.
Site C-2Site C-2
Pre-Excavation
Site CSite C
Site C-2 Excavation of Contaminated Soils
Site CSite C
Site C-2 Excavation of Contaminated Soils and Verification of Elevation
Site CSite C
Site C-2 Stabilization of Contaminated Soils
Site C-2Site C-2
Site C-2 Load Out of Contaminated Soils
Site C-2Site C-2
Site C-2 Load Out of Contaminated Soils
Site C-2Site C-2
Site C-2 Grading
Site C-2Site C-2
Site C-2 Final Grade
Site C Replacement WetlandSite C Replacement Wetland
Clearing and Grubbing
Site C Replacement WetlandSite C Replacement Wetland
Excavation of soils from Wetland Area
Site C Replacement WetlandSite C Replacement Wetland
Installing the Swale and Placing Rock
Site C Replacement WetlandSite C Replacement Wetland
Installing the Swale and Placing Rock
Site C Replacement WetlandSite C Replacement Wetland
Removal of the Existing Weir
Site C Replacement WetlandSite C Replacement Wetland
Burn Area
Site C Replacement WetlandSite C Replacement Wetland
Burn Area Sampling
Site C Replacement WetlandSite C Replacement Wetland
Wetland Final Grade
TCAAP OspreyTCAAP Osprey