T Tank Farm Interim Surface Barrier Demonstration - Vadose Zone Monitoring FY08 Report

Zhang, Z. F. ; Strickland, Christopher E. ; Field, Jim G. ; Parker, Danny L.

关键词: CONTAMINATION;    FARMS;    MOISTURE;    MONITORING;    MONITORS;    PRECIPITATION;    RIVERS;    SOILS;    STORAGE FACILITIES;    TANKS;    WATER Tank Farm;    Monitoring;    Vadose Zone;    Barrier;   

DOI  :  10.2172/960316
RP-ID  :  PNNL-18083 FINAL
PID  :  OSTI ID: 960316
Others  :  Other: 830403000
Others  :  TRN: US200923%%480

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

DOE’s Office of River Protection constructed a temporary surface barrier over a portion of the T Tank Farm as part of the T Farm Interim Surface Barrier Demonstration Project. The surface barrier is designed to minimize the infiltration of precipitation into the contaminated soil zone created by the Tank T-106 leak and minimize movement of the contamination. As part of the demonstration effort, vadose zone moisture is being monitored to assess the effectiveness of the barrier at reducing soil moisture. A solar-powered system was installed to continuously monitor soil water conditions at four locations (i.e., instrument Nests A, B, C, and D) beneath the barrier and outside the barrier footprint as well as site meteorological conditions. Nest A is placed in the area outside the barrier footprint and serves as a control, providing subsurface conditions outside the influence of the surface barrier. Nest B provides subsurface measurements to assess surface-barrier edge effects. Nests C and D are used to assess changes in soil-moisture conditions beneath the interim surface barrier.