Industrial & Manufacturing cleanup site — Restorical Research
3M Co - Wausau Greystone Quarry
Wausau, Marathon County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as an industrial and manufacturing facility going back to 1936. Historical insurance policies issued during those prior operations and through 1986 could help fund the multi-phase investigation and remediation work ahead under Wisconsin DNR oversight.

This property has been in continuous industrial use since 1936, when quarrying and roofing granule production operations began. A former coloring wastewater disposal area on site reflects decades of industrial waste handling, and historically established monitoring wells confirm a long record of environmental concern. Groundwater sampling has revealed PFOA concentrations ranging from 41 to 1,200 ng/L and PFOS concentrations from 220 to 650 ng/L across multiple alluvial and bedrock monitoring wells, with PFAS also detected in production wells and surface stormwater basins. The site is an active Wisconsin DNR Environmental Remediation Program case, with a Site Investigation Workplan submitted and the formal investigation phase ahead. That history could support an insurance coverage claim against the carriers who issued policies more than 40 years ago — coverage that could help fund the cleanup ahead.

Former Use
Former Industrial & Manufacturing
LocationWausau, Marathon County
Historical UseIndustrial & Manufacturing
Est. Operating Since1936
DNR ProgramEnvironmental Remediation Program
Contamination & Investigation
Site Assessment Summary
ContaminantsPer- and polyfluoroalkyl substances (PFAS), including PFOA and PFOS, in groundwater and surface stormwater; metals in the former wastewater disposal area
Regulatory ProgramWisconsin DNR — NR 700
BRRTS #02-37-596321

Why Historical Insurance Policies May Be Accessible

Pre-1986 Commercial General Liability (CGL) policies were occurrence-based and did not contain an effective pollution exclusion in Wisconsin — and those policies may provide coverage that remains enforceable today. If contamination occurred while those policies were active, those historical insurance carriers may still have a legal obligation to fund the cleanup costs, even if the business closed or the property changed hands.

Industrial operations at this property — including quarrying and roofing granule production — began in 1936 and continued through decades of industrial waste handling well before 1986. The formal site investigation, groundwater remediation, and long-term PFAS monitoring required under the Wisconsin DNR Environmental Remediation Program represent substantial future costs that the CGL carriers of pre-1986 operators may be obligated to fund.

Restorical's role is to locate viable historical policies, determine whether a successful coverage claim is possible, and assist our clients and their legal counsel to obtain insurance coverage. Restorical then manages the claim, including accounting, to ensure the cleanup is funded in a timely manner.

What We Look For

  • Historical insurance policies (pre-1986)
  • Policy numbers, carrier names, and coverage periods
  • Connection between contamination timing and policy period
  • Evidence linking cleanup obligation to insured activity

What We Deliver

  • Historical Coverage Chart
  • Trigger Analysis & Property/Policy Nexus
  • Coverage strategy with recommendations
  • Insurance funding for your remediation
  • Claims Management

The Restorical Proven Process

Task 1 — Research and Analysis
Restorical searches for viable historical insurance policies, researches the site history, analyzes the contamination impacts, and underwrites potential coverage — including a proprietary trigger analysis. At the end of Task 1, we provide a clear yes or no on whether viable insurance coverage exists to fund the cleanup, along with a strategy and recommendation specific to your situation, even if you are not the policyholder.
Task 2 — Coverage and Funding
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim, negotiate and secure insurance coverage. Restorical will manage the ongoing claim process, including accounting to ensure the insurance companies are funding your remediation in a timely manner.

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This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.