Reuse of Petroleum Contaminated Soil: The Mn/DOT Biomound Proceess
Biomounding is an effective, environmentally friendly process for treating petroleum-contaminated soil. Minnesota Department of Transportation developed an innovative remediation technique that combines petroleum- contaminated soil, manure and low-grade wood chips into a reusable material which is used as a topsoil amendment. The biomound remediation process has resulted in the reuse of large volumes of waste materials. Since 1991, Minnesota has used the biomound treatment process to successfully treat over 30,000 cubic yards of petroleum-contaminated soil excavated from more than 15 projects and has produced a video encouraging the use of this proven treatment technique. This successful process has been effective and accepted by local agencies of government and the general public. The innovative combination of waste materials that are remediated, recycled and reused as topsoil amendments for use on future roadway construction projects continues to result in a practical, cost-effective and environmentally sound approach to dealing with contaminated soil.