Closure Report for Corrective Action Unit 322: Areas 1 and 3 Release Sites and Injection Wells, Nevada Test Site, Nevada Page: 13 of 182
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CAU 322 Closure Report
Section: Introduction
Revision: 0
Date: June 2006
1.0 INTRODUCTION
Corrective Action Unit (CAU) 322 is listed in Appendix III of the Federal Facility Agreement
and Consent Order (FFACO, 1996), an agreement between the U.S. Department of Energy
(DOE), the U.S. Department of Defense, and the State of Nevada, as "CAU 322 - Areas 1 and 3
Release Sites and Injection Wells." CAU 322 consists of three Corrective Action Sites (CASs)
located in Areas 1 and 3 of the Nevada Test Site (NTS), which is located approximately 65 miles
northwest of Las Vegas, Nevada (NV). Figure 1 depicts the approximate CAS locations within
NTS. Specifically, CAU 322 includes:
" CAS 01-25-01, AST Release
" CAS 03-20-05, Injection Wells
" CAS 03-25-03, Mud Plant AST Diesel Release
The three sites reportedly included aboveground storage tank (AST) releases/spills, an injection
well with associated holding tanks and transfer piping, and an area of contaminant-impacted soil.
None of the CASs are directly adjacent to active facilities. Historical details of the CASs are
provided in the CAU 322 Corrective Action Investigation Plan (CAIP) (U.S. Department of
Energy, National Nuclear Security Administration Nevada Site Office [NNSA/NSO], 2003), and
the CAU 322 Corrective Action Decision Document (CADD) (NNSA/NSO, 2004).
The corrective actions described in the corrective action plan (CAP), (NNSA/NSO, 2005) were
implemented from February 2006 through May 2006. This closure report (CR) has been
prepared for CAU 322 in accordance with the FFACO and the Nevada Division of
Environmental Protection (NDEP)-approved CAP.
1.1 PURPOSE
The purpose of this CR is to document that the closure of CAU 322 complied with the
NDEP-approved CAP closure requirements (NNSA/NSO, 2005). The closure activities
specified in the CAP were based on the approved corrective action alternatives presented in the
CAU 322 CADD (NNSA/NSO, 2004).
1.2 SCOPE
The approved closure strategy for CAU 322 was specified in the CAU 322 CADD
(NNSA/NSO, 2004). The approved alternative for all three CASs was Closure in Place with
Administrative Controls. The strategy for implementing this closure was presented in the
CAU 322 CAP (NNSA/NSO, 2005).
Closure activities included:
" Removal, solidification, and disposal of standing liquids from the holding tanks and transfer
piping at CAS 03-20-05 as a best management practice (BMP).
" Removal and disposal of the top 2 feet (ft) of impacted soil from within the CAS 03-20-05
exterior injection well casing, as well as a nearby area of impacted surface soil, as a BMP.1
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U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office & Nevada, Bechtel. Closure Report for Corrective Action Unit 322: Areas 1 and 3 Release Sites and Injection Wells, Nevada Test Site, Nevada, report, June 1, 2006; United States. (https://digital.library.unt.edu/ark:/67531/metadc894288/m1/13/: accessed March 29, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.