ST. AUGUSTA TOWNSHIP
Congressional District # 06
ST. AUGUSTA SANITARY LANDFILL/ENGEN DUMPEPA ID# MND981002256
Last Updated: November, 2011
The St. Augusta Landfill / Engen Dump site is located in St. Augusta Township, Stearns County, Minnesota. The site 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. The St. Augusta Landfill is approximately 16 acres in size. A borrow pit that was used to provide cover material for the St. Augusta Landfill is located on the northern side of the landfill. Landfill operations were conducted between 1966 and 1982. The site was the primary waste disposal site for the St. Cloud area during this time. A second waste area included in the site, 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 between 1971 and 1972, and portions of the dump were covered with onsite soils.
Site ResponsibilityThis site is being addressed through state actions. The landfill property and groundwater plume area are owned by the State of Minnesota as part of the state's Closed Landfill Program.
Threats and ContaminantsIndustrial wastes in the landfills present a potential threat if a proper cover and gas controls were not maintained. Groundwater is contaminated with heavy metals that include arsenic, barium, and lead; volatile organic compounds (VOCs); atrazine; and phthalates. Potential health threats include coming into direct contact with and ingestion of contaminated groundwater. A Land Use Plan to ensure continued protection from these potential threats is planned.
In 1992, a groundwater investigation and feasibility study was prepared under a request for response action, issued by the Minnesota Pollution Control Agency (MPCA). The recommendation under the request for response action was no further action. No further response action was appropriate because a closure plan was prepared and executed for the landfill as part of an enforcement action (Stipulation Agreement and Closure Order) issued by MPCA. No 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 areas of stressed vegetation related to gas migration, the MPCA installed an active gas extraction system.
The United States Environmental Protection Agency deleted the site from the National Priorities List in November 1996. A preliminary close-out report was signed on June 6, 2000, documenting that all construction was completed. Five year reviews conducted for the site document that the remedy remains protective of human health and the environment.
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