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Fig. 1. Composite figure showing parameter values (total bacteria cells, respiration of 14C-labeled glucose, CO2, moisture content, soil porosity, and saturated hydraulic conductivity) plotted against depth for the barriers at the Engineered Barrier Testing Facility. Thick barrier data denoted with square markers; Capillary barrier denoted with round markers. Data are shown as mean (n = 3 independent replicates) ± one standard deviation except CO2, which reflects a single, unreplicated sample at each depth.
