Congressional District # 02
SCA INDEPENDENT LANDFILLEPA ID# MID000724930
Last Updated: May, 2014
The SCA Independent Landfill Superfund Site is located in Muskegon County, Michigan. The Site occupies about 100 acres. The landfill, which occupies about one-third of the Site, stopped accepting refuse in 1986 and was closed in 1987. The landfill accepted domestic and industrial waste, primarily in the 1960s and 1970s. There are approximately 10,000 people living within three miles of the Site.
The landfill is located in a swampy area about one-eighth mile south of Black Creek, a coldwater stream. Black Creek has been restocked successfully with trout since 1987. The groundwater flow from the Site discharges to the adjacent, downgradient wetlands, and to a much lesser degree to Black Creek.
Groundwater, surface water, and wetlands are primarily contaminated with ammonia and manganese; with isolated detections of other inorganic and organic contaminants.
Site ResponsibilityThis Site is being addressed by the Potentially Responsible Party (PRP) under enforcement activity by the State of Michigan.
Threats and ContaminantsGroundwater, surface water, and wetlands are primarily contaminated with ammonia and manganese; with isolated detections of other inorganic and organic contaminants.
Cleanup ProgressIn 1993, the Michigan Department of Environmental Quality (MDEQ) and the PRP entered into an enforcement agreement for the PRP to study the nature and extent of site contamination (Remedial Investigation [RI]), study site cleanup alternatives (Feasibility Study [FS]), and develop a plan for site cleanup (Remedial Action Plan [RAP]). The PRP completed the RI, which was approved by the State in December 1995. In mid-1996, MDEQ received and commented on the PRP's draft FS and RAP. In late 1996, the PRP conducted additional groundwater and surface water monitoring to confirm that zinc poses no unacceptable risk to the surface water.
In 1997, MDEQ conducted toxicity tests of wetland water samples to evaluate the impact of high manganese and ammonia concentrations on the wetland ecosystem and Black Creek. The samples were taken on the northwest edge of the plume. The results showed toxicity in the upgradient groundwater as well as in the wetlands. The wetlands contamination was more correlated with ammonia than manganese. Also, the PRP conducted further monitoring in 2008 on the first three downgradient properties to better define the contaminant plumes. MDEQ believes that drinking water restrictions to be put in place to prevent the consumption of contaminated groundwater will be protective of human health.
In September 2001, the U.S. Environmental Protection Agency (U.S. EPA) issued a report documenting cleanup construction completion. The PRP completed construction in 2001 under the oversight of MDEQ.
The constructed remedy includes: (1) improvement of the waste cover and surface water drainage; (2) leachate management system modification, including installation of a larger leachate collection tank and improved piping; and (3) excavation of areas of highly contaminated surface soil.
The PRP began long-term groundwater and surface water monitoring in 2001. MDEQ will be working with the PRP to apply Notices of Aesthetic Impact to deeds of downgradient residents. Enhanced leachate extraction may be needed to address any remaining groundwater/surface water criteria exceedances, since surface water biota cannot be protected with use restrictions.
The May 2005 Five-Year Review Report issued by MDEQ, with U.S. EPA concurrence, showed that exposure pathways that could result in unacceptable human health risks are being controlled. The remedy will be fully protective of human health and the environment when construction enhancements to the leachate extraction system and land use restrictions are implemented, and when groundwater clean-up goals are attained. MDEQ continues to work with the PRP to implement the recommendations of the Five-Year Review Report. MDEQ has reviewed the PRP's Supplemental RI Work Plan that describes work to further delineate the ammonia and manganese groundwater plume.
At the request of the PRP, an agreement to terminate the 1993 AOC was entered between the MDEQ and the PRP in August 2013.
Although U.S. EPA will continue to obtain updates from MDEQ on Site activities, U.S. EPA will no longer require that Five-Year Reviews be conducted, because U.S. EPA was not involved in the remedy selection decision. However, U.S. EPA continues to work with MDEQ to have the PRP implement the remaining, outstanding recommendations in the 2005 Five-Year Review Report.
ContactsRemedial Project Manager, U.S. EPA
diane russell (firstname.lastname@example.org)
Community Involvement Coordinator, U.S. EPA
AliasesSCA INDEPENDENT LDFL