A.4.1.2 RDX decision unit (M2-B)

The RDX concentrations (mg/kg) shown in Figure A-3 (map and histogram on the right) depict a 10 m × 10 m DU with more extreme heterogeneity. The map shows one area with extremely high concentrations (bottom middle) and a second area with high concentrations (middle right side) while the rest of the DU has orders of magnitude lower concentrations. This DU represents a site with relatively strong small- and large-scale spatial heterogeneity with a CV of approximately 4.5 (standard deviation = 319 mg/kg; mean = 71.4 mg/kg).