Phase II RCRA Facility Investigation Report, Tooele Army Depot-North Area, Group A, Suspected Releases SWMUs; Volume 1 - Text.

Environmental investigations were conducted during 1993-1995 at eleven solid waste management units SWMUs or sub-SWMUs at the Tooele Army Depot-North Area TEAD-N as part of a Phase II Resource Conservation and Recovery Act RCRA Facility Investigation RFI under the terms of a State of Utah Corrective Action Permit. Environmental sampling and an ecological survey were conducted at each SWMU to determine the horizontal and vertical extent of waste constituents found to be during a present previous Phase I RFI at TEAD-N. The generated data were used to perform risk assessments for each of the investigated SWMUs. A total of 299 soil samples, two sediment samples, seven water samples, and two total suspended particulate air filter samples were collected during the Phase II sampling, as well as 19 background soil samples. Based on the Phase I and Phase II sampling results, and the subsequent risk assessments, two SWMUs are recommended for no further action under the current Corrective Action Permit and nine SWMUs or sub-SWMUs are recommended for RCRA Corrective Measures Studies CMS based on possible risks to on-site workers or the environment.