Performance Comparison: Direct-Push Wells Versus Drilled Wells

摘要

A comparison between ground water monitoring alternatives (direct- push installed monitoring wells and drilled monitoring wells) is being conducted on the leading edge of a methyl tertiary butyl ether (MTBE) plume located in a shallow semi-perched aquifer (saturated thickness extending 9 to 22 feet (2.7 to 6.7 meters) below ground surface). The purpose of this effort is to determine whether direct-push wells compare favorably with conventional hollow stem auger (HAS) drilled wells. To make this determination, ground water samples were extracted from numerous adjacent direct-push and HAS installed wells over several sampling events. Analysis of variance (ANOVA) statistical techniques were applied to the resulting chemical data to differentiate between the variability attributed to well type, temporal, and spatial factors.