Construction Quality Control and Post-Construction Performance Verification for the Gilson Road Hazardous Waste Site Cutoff Wall

摘要

The report describes assessment activities undertaken to evaluate the effectiveness of a soil/bentonite backfilled cutoff wall (slurry trench) installed for the purpose of hazardous waste containment. The work includes development and evaluation of field quality control tests, evaluation of electronic piezocone instrumentation for post-construction verification of backfill homogeneity, and evaluation of cutoff wall bulk hydraulic conductivity via hydraulic stress testing. The information in the report is useful to those involved in the feasibility study, design and/or construction of cutoff walls as a hazardous waste remediation technology.