Monitoring and data analysis for the Vadose zone monitoring system (VZMS), McClellan AFB - Quarterly Status Report - 5/20/98-8/20/98

摘要

This report contains information on field and laboratory work performed between May 20, 1998 and August 20, 1998, at site S-7 in IC 34, at McClellan AFB. At this location, a Vadose Zone Monitoring System (VZMS) (LBNL, 1996) is currently being used to collect subsurface data including hydraulic potential, soil gas pressure, moisture content, water chemistry, gas chemistry, and temperature. Samples will continue to be collected on a bimonthly schedule until the first rain of the season, at which point monthly sample collection will commence. This report describes: moisture content changes, based on neutron logging; gas-phase VOC concentrations; aqueous-phase VOC concentrations; temperature profiles; and results from new instrument cluster.