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

Ge Geology of the

• logy 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

• catio

ation n (Ke Kent nt Cou

• unty,

nty, MI MI )

House Street Wolven/Jewell Source Area Tannery

Wo Wolven ven-Jewe Jewell ll So Source rce Are rea

• Gravel pit where liquid disposal appears to

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

1953 USGS

EPA geophysical survey of source area

Wo Wolven ven-Jewe Jewell ll Are rea

• Drinking Water wells over

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

Wellington Ridge Drinking Water Wells, PFOA/PFOS above; total PFAS right

Tra racking king Pl Plumes: mes: PF PFOA OA/PF PFOS OS or

• r Tot
• tal

l PF PFAS

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