Soil characteristics are very important in determining how a contaminant breaks down into harmless compounds and whether it leaches into groundwater. Because most of the breakdown occurs in the soil, there is a greater potential for groundwater contamination in areas where contaminants move quickly through the soil.
Soil properties of concern include: porosity, organic matter, texture, pH, depth of soil horizon, permeability, drainage class, and the soil's natural purification capability.
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