Wood waste leachates are commonly characterized by lignin-tannin (measured as tannic acid), oxygen demanding materials, color, and odor. In this study, lignin-tannin concentrations in the ground water ranged as high as 7. 5 mg/I: iron and manganese were also shown to increase markedly relative to natural background concentrations, ranging as high as 13 mg/I and 106 mg/I, respectively