ST. AUGUSTA TOWNSHIP
Congressional District # 06
ST. AUGUSTA SANITARY LANDFILL/ENGEN DUMPEPA ID# MND981002256
Last Updated: May, 2015
The St. Augusta Landfill/Engen Dump site is located in St. Augusta Township, Stearns County, Minnesota. The site property covers 48 acres and is bounded by the Mississippi River on the northeast, Johnson Creek on the southeast, Interstate Highway 94 on the west, and privately-owned land to the south and the north. Three landfill areas were initially present on the site (St. Augusta Landfill and two fill areas of the Engen Dump), but have now been consolidated into one waste footprint at the location of the St. Augusta Landfill. The St. Augusta Landfill was in operation between 1966 and 1982 and was the primary waste disposal site for the St. Cloud area during this time. The Engen Dump began to receive municipal, commercial, and industrial wastes in 1966. The industrial wastes disposed of at the dump consisted of ground glass, solids and sludges, paper pulp waste, ash, and small amounts of cutting oils, coolants, solvents, paints, and cleaning compounds. The dump was phased out of operation by 1972, and portions were covered with onsite soils.
Site ResponsibilityThis site was addressed through State actions. Currently the landfill is operated and maintained by the Minnesota Pollution Control Agency (MPCA)'s Closed Landfill Program.
Threats and ContaminantsIndustrial wastes in the landfills presented a potential threat if a proper cover and gas controls were not maintained. In the past, groundwater was contaminated with heavy metals that included arsenic, barium, and lead; volatile organic compounds (VOCs); atrazine; and phthalates. In recent years, groundwater has exceeded drinking water standards for arsenic and manganese.
In 1992, a groundwater remedial investigation and feasibility study was conducted as a result of a request for response action issued by the MPCA. The study results suggested that no further action was necessary for groundwater at the site. A landfill closure plan was prepared and executed for the landfill as part of an enforcement action (Stipulation Agreement and Closure Order) issued by MPCA. No EPA Record of Decision (ROD) was issued for the site.
In 1994, the legislature of the State of Minnesota enacted the Landfill Cleanup Act, authorizing MPCA to assume responsibility for future environmental response actions at qualified landfills that have received notices of compliance. A notice of compliance was issued by MPCA for the St. Augusta Landfill/Engen Dump site on May 8, 1995. MPCA has since assumed all responsibility for the St. Augusta Landfill/Engen Dump under the Act. Therefore, no further response actions under federal law were necessary.
Beginning in 1996, the MPCA excavated the Engen Dump, and another area known as the Land Investors site, and placed them on the St. Augusta footprint in order to improve the slope for better surface water drainage and to consolidate the overall waste footprint. A final cover was completed in 1997. In 2002-2003, due to the proximity of the waste to the property boundary and the identification of areas of stressed vegetation related to gas migration, the MPCA installed an active gas extraction system.
EPA deleted the site from the National Priorities List (NPL) in November 1996. The site remains under active management by the MPCA's Closed Landfill Program, which regularly maintains and monitors the site.
ContactsRemedial Project Manager, U.S. EPA
leah evison (firstname.lastname@example.org)
Community Involvement Coordinator, U.S. EPA
AliasesST AUGUSTA SAN LDFL ST CLOUD DUMP
ST AUGUSTA LDFL ENGER DUMP