Supplementary Remedial Investigation/Feasibility Study of Umatilla Depot Activity, Hermiston, Oregon. Intermediate and Alluvial Well Installation Report. Site 4, Explosive Washout Lagoons
Abstract
The Intermediate and Alluvial Well Installation Report for Site 4, Explosive Washout Lagoons', Umatilla Depot Activity (UMDA), Hermiston, Oregon, has been prepared for the U.S. Army Environmental Center (USAEC) under the Base Realignment and Closure (BRAC) Program. The report documents the methods used to install four intermediate wells and two alluvial wells at Site 4 and the hydrogeologic conditions encountered. The wells were installed to (1) further assess the stratigraphy beneath Site 4; (2) assess the degree of interconnection between the basalt and the overlying alluvial sediments; (3) document water quality within the intermediate zone and further delineate explosives and nitrate/nitrite contamination within the alluvial aquifer; and (4) document horizontal and vertical groundwater flow patterns within the intermediate zone. Monitoring well installation, Hydrogeology investigation, Remedial investigation/feasibility study.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1994
- Accession Number
- ADA280331
Entities
People
- E. Ritchie
- M. Ochsner
- R. Tucker
- S. Lemont
- T. Llewellyn