Rocky Mountain Arsenal Northwest Boundary Containment/Treatment System Construction Report. Text, Drawings, Photos

摘要

The Northwest Boundary Project is located along the northwest boundary of Rocky Mountain Arsenal, Commerce City, Colorado. The system was constructed to contain and treat ground water which has been polluted with organic contaminants produced at the arsenal. The system consists of: 1) A Soil Bentonite cutoff barrier keyed into bedrock, 2) 15 dewatering wells, 3) 21 recharge wells, 4) 17 piezometers, and 5) a carbon adsorption treatment plant. Foundation explorations included soil borings, bedrock sampling, ground water hydrology testing, and bedrock and soil permeability tests. Investigations during construction included visually logging well cuttings, inspection of excavated slurry trench materials, blast hole drilling, and slurry and backfill testing. Keywords: Ground Water Hydrology; Permeability; Transmissivity; Organic Contaminant; Soil-Bentonite Cutoff Barrier; Carbon Adsorption; Dewater Wells; Recharge Wells; Bedrock; Excavation.