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Waste Disposal Engineering

Site Information
Contact Information

Community Involvement Coordinator
Cheryl Allen (allen.cheryl@epa.gov)
312-353-6196 or 800-621-8431, ext. 36196

Lead Agency Contact
Jean Hanson, Land Manager
Minnesota Pollution Control Agency (jean.hanson@state.mn.us)
(651) 757-2408
7:00 – 4:30, M-F

Support Agency Contact
Leah Evison (Evison.leah@epa.gov)
(651) 757-2898
9:00 – 5:30, M-F


(where to view written records)

Minnesota Pollution Control Agency
520 Lafayette Road North
St. Paul, MN 55155-4194

Documents can be obtained by contacting the Jean Hanson, Land Manager, at (651) 757-2408 or via email at jean.hanson@state.mn.us


The Waste Disposal Engineering Former Superfund Site, also known as WDE Landfill, is a 114 acre property that includes a 73 acre landfill located between Crossover Boulevard NW and Hanson Boulevard NW in Andover, Minnesota. The site was operated as a dump or landfill from 1963 to 1983. From 1972 until 1974, approximately 6,600 containers of hazardous wastes were disposed into a pit in the landfill. Additional hazardous wastes were placed in other parts of the landfill. In total, the landfill contains approximately 2.5 million cubic yards of wastes. The Minnesota Pollution Control Agency ordered the hazardous waste pit closed in 1974. The rest of the landfill was closed in 1983 and the site was listed on the National Priorities List for cleanup.

After selecting a cleanup plan for the landfill in 1987, EPA issued a Unilateral Administrative Order to a group of potentially responsible parties. Under the oversight of MPCA and EPA, the parties constructed an underground clay wall (slurry wall) around the hazardous waste pit, installed a groundwater pump-out and treatment system, and constructed an improved landfill cap and passive gas control system for the landfill. In 1995, the PRP group and MPCA entered into an agreement called a Landfill Cleanup Agreement. Following this agreement and issuance of a Notice of Compliance, the MPCA took over operation and maintenance of the landfill. EPA removed the site from the NPL in 1996. In 1998, MPCA constructed a major upgrade to an active gas control system. More recently, MPCA installed a new technology to treat contaminants from the hazardous waste pit.

Site Updates || Technical Documents || Five-Year Reviews || Legal Agreements ||

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Site Updates

January 2013

MPCA oversees the operations and maintenance of the active gas extraction system and the groundwater treatment systems, conducts monitoring of both groundwater wells and gas probes, and regularly conducts site inspections. Every five years, EPA reviews the protectiveness of the landfill and groundwater remedy cleanup progress. In its most recent review, conducted in 2008, EPA found that the cleanup is functioning as designed and currently protects people and the environment. EPA also made technical recommendations for follow-up actions which were conducted by MPCA. MPCA continues to upgrade their maintenance and monitoring of the landfill and groundwater cleanup systems as needed. Currently, EPA's next five-year review is in progress and will be completed in April 2013.

Technical Documents

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Five-Year Reviews

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Legal Agreements

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