Muskegon County, Ravenna, Muskegon County Landfill Type II

Updated: December 11, 2019

Muskegon County Landfill Type II PFOS+PFOA Detection Map

Background

Muskegon County Landfill (MCL) is an active Type II municipal landfill operated by the county and located at 9366 Apple Avenue.  There have been historical low level Volatile Organic Compound (VOC) impacts to groundwater from past landfill activities.  A Remedial Action Plan was designed and completed in the late 1990s, and currently there are no VOC detections.  The majority of the MCL is surrounded by a groundwater interceptor ditch.  The ditch water level surface is representative of groundwater and captures groundwater and contaminants that may be flowing under the MCL. Because of the MCL’s historical VOC impacts to groundwater, a potential impact of PFAS was also of concern.

Recent Accomplishments

  • November 7, 2019, MCL submitted a plan to further define PFAS impacts to groundwater on Landfill property as a part in developing a remedial action plan.

Next Steps

  • Current data suggests no to very little PFAS is migrating beyond the groundwater interceptor trench.  Muskegon County is in the process of completing one vertical aquifer boring to better determine if any PFAS is migrating beyond the groundwater interceptor trench.
  • Continued discussions between EGLE and MCL to develop a Remedial Action Plan sampling strategy.

Residential Well Testing/Alternate Water Information

  • The closest drinking water receptors are residential homes approximately 1,900 feet west/southwest from the most impacted onsite monitoring wells.
  • MCL’s consultant, Golder Associates, sampled six groundwater monitoring wells outside of the interceptor trench and all were non-detect for PFOS and PFOA; the highest total PFAS was less than 5 ppt.

Upcoming Community Engagement

  • None scheduled at this time.
Sampling: PFOS and PFOA Only

Type of Sample

Date Sampled

# of Samples

# of Results Received

# of Non-detects

# Between Non-detect and standard*

# > Standard

Groundwater

Feb 26, 2019 10 10 6 2 2
Non-Potable Supply Well Nov 28, 2019 2 2 1 1 0

Cumulative

  12 12 7 3 2


*Groundwater results are compared to EGLE Part 201 Criteria of 70 ppt PFOS+PFOA.
Sampling notes

  • The closest surface water receptor is the Black Creek, approximately 900 feet from the most impacted on-site monitoring wells.
  • On-site quarterly monitoring within the interceptor trench indicates groundwater flow direction is to the west/southwest.  West of the landfill and interceptor trench, groundwater flows to the north.  The Black Creek, which is directly south of the site, flows from east to west.

Muskegon County Landfill Type II Historical Timeline

Muskegon County Landfill is an active Type II municipal landfill operated by the county.  There have been historical low level Volatile Organic Compound (VOC) impacts from past landfill activities.  A Remedial Action Plan was designed and completed in the late 1990s, and currently there are no detections of VOCs downgradient of the landfill.  The site is surrounded by a ditch that intercepts groundwater and is reflective of groundwater surface elevation.  The site conceptual model assumes any contaminants which may leak from the landfill will be intercepted by the groundwater interceptor ditch.  This has historically been true for prior VOC impacts to groundwater.  Because of its historical VOC release to the environment, a potential release of PFAS was also of concern.

  • March 6, 2018, The Industrial Pre-Treatment Program (IPP) sampled the landfill leachate for PFAS.  Results indicated PFOA+PFOS values ranging from 380 ppt to 1,500 ppt.  
  • November 28, 2018, the MCL sampled nine groundwater monitoring wells and 2 non-potable onsite supply wells.
  • February 26, 2019, the MCL sampled one groundwater monitoring well downgradient of the MCL.