Central Sanitary Landfill

PFAS was found in groundwater at the Central Sanitary Landfill. Based on environmental and health concerns, further review and possible action may be necessary to best protect public health. More details about this location will be made available as soon as possible.

  • Central Sanitary Landfill (CSL) is located 2/3 of a mile northwest of the Village of Pierson and is owned and operated by Republic Services.
  • The landfill has had a history of groundwater impacts but operates a groundwater remediation system which remediates Volatile Organic Compounds detected in the groundwater.
  • The landfill is almost completely double-lined, with a leak detection system installed in between except for a small portion of the landfill in the north.
  • In November 2017, Wolverine World Wide Corporation identified CSL as a location where they disposed of various tannery wastes from approximately 1984-2009.These wastes likely contained high levels of PFAS.
  • The DEQ worked with Republic to develop a workplan to address several issues that were identified at the site, one of them being PFAS.These communications occurred between December 2017 through the middle of February 2018.
  • On February 27 and 28, 2018 the first round of PFAS samples were collected from 10 monitoring wells around the landfill. In March, Republic voluntarily collected samples from two non-potable supply wells which they use on-site for flushing toilets, washing hands and other maintenance activities.
  • On April 13 the DEQ learned that 5 of the 12 wells that were sampled contained PFAS that exceeded the 70 ppt LHA.Results are shown in the table below.
  • 19 residential wells, two of which are Type II Public Supply wells, were selected to be sampled based on groundwater flow direction.18 residential wells were sampled on May 2 and 3 of 2018; 1 resident refused to be sampled. Results of this sampling are pending.
  • Additional groundwater monitoring well sampling on landfill property started early May and is expected to be completed mid-May to further delineate PFAS groundwater impacts.
  • Additional groundwater monitoring wells will be installed on the west side of the landfill to determine if PFAS impacts have migrated offsite and to better define groundwater flow. Installation will begin once access is granted from MDOT.

# Groundwater Monitoring Well Samples

# Groundwater Monitoring Well Results Received

# Non-Detect (PFOS + PFOA)

#ND – 70 ppt (PFOS + PFOA)

#> 70 ppt (PFOS + PFOA)

Highest Groundwater Monitoring Well Value (PFOS + PFOA) in ppt