Ge Geology of the ology of the Wol Wolven ven/Jewell Source - PowerPoint PPT Presentation

Ge Geology of the ology of the Wol Wolven ven/Jewell Source /Jewell Source Are Area Wolverine CAG Meeting – April 16, 2020 Zoom Meeting Presentation by: Karen Vorce & Mark Worrall EGLE – RRD

Si Site e Loc ocatio ation n (Ke Kent nt Cou ounty, nty, MI MI ) Tannery Wolven/Jewell Source Area House Street

• Gravel pit where liquid disposal appears to Wo Wolven ven-Jewe Jewell ll So Source rce Are rea have occurred is active in the 1950s but inactive by 1965 • Designation as waste disposal area based on multiple lines of evidence including eyewitnesses, aerial images, groundwater impact, soil impact, and chemical signature • Over 50’ of elevation change within the neighborhood with the gravel pit being in the topographic high area where the highest concentrations are found EPA geophysical survey of source area 1953 USGS

• Drinking Water wells over Wo Wolven ven-Jewe Jewell ll Are rea 70ppt PFOA/PFOS: 78 78 • Drinking Water wells over 1,000ppt for PFOA/PFOS: 19 19 • Drinking Water well’s highest concentration: 72,400 00 ppt • On groundwater divide with flow in multiple directions; Rogue River encircles area • High heterogeneity in lithology; • Source area- Sand unit at surface to a depth of 60- 80’, underlain by a clay unit 50’ thick; • Below the clay are impacted aquifers starting at 120- 130’

Wo Wolven ven-Jewe Jewell ll Are rea

Tra racking king Pl Plumes: mes: PF PFOA OA/PF PFOS OS or or Tot otal l PF PFAS Wellington Ridge Drinking Water Wells, PFOA/PFOS above; total PFAS right

Wo Wolven ven-Jewe Jewell ll Are rea • Neighborhood built over suspected source area • Heterogeneity

Wo Wolven ven-Jewe Jewell ll Are rea • Principle W-J plume is narrow close to the source area and at very specific elevations

Wo Wolven ven-Jewe Jewell ll Are rea • W-J northeast area: lack of monitor wells hinders plume definition to the northeast • Plume likely following discrete & narrow paleo - channels

Wo Wolven ven-Jewe Jewell ll Are rea • W-J plumes in the North Childsdale area become a “cross - roads” of plumes • Very shallow plume from unknown source – groundwater flow to southwest, short plume • Shallow plume from source to the southwest (possible North Kent Landfill) – groundwater flow to northeast, short plume • Deeper plumes from W-J source area – groundwater flow to southeast to the Rogue River

Questions? For more information on Wolverine investigations visit the Michigan PFAS Action Response Team (MPART) website at www.michigan.gov/belmont www.Michigan.gov/rockfordtannery