An untreated soil sample at this former mill contained a total lead of 190,000 mg/kg, leaching at 651 mg/L. A dosage rate (wt./wt.) of 4% EnviroMag Coarse reduced lead leachability to 0.71 mg/L (UTS TCLP standard of 0.75 mg/L). Sample 02 contained the highest total and leachable lead in the bench-scale study. It was utilized to design the upper limit of treatment chemistry and dosage rate. Dosage rate was then scaled back where appropriate in further bench and pilot testing, as soil impacts were delineated on-site to optimize dosage and costs. After treatment, soils were disposed of off-site. The township purchased the reclaimed former mill property from the responsible party for greenspace and nature path uses.
