Car Dealerships cleanup site — Restorical Research
Nigburs Fine Furniture (Former)
Wausau, Marathon County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as an automobile dealership going back to 1955. Historical insurance policies issued during those prior operations and through 1986 could help fund the ongoing cleanup and groundwater monitoring obligations that Wisconsin DNR continues to oversee.

An automobile dealership operated on this property from the mid-1950s through the late 1970s, with service bays equipped with hydraulic hoists for vehicle maintenance and repair. During demolition in 2026, an unregistered underground storage tank attributed to the dealership era was discovered, and a limited site investigation concluded that naphthalene contamination in soil and groundwater is likely related to a historic release from that UST, which may have historically contained diesel fuel. Petroleum contamination has been confirmed in saturated soils at the water table across multiple test locations, with naphthalene detected at concentrations exceeding the NR 720 protection-of-groundwater residual contaminant level and elevated photoionization detector readings recorded at six of eight test pit locations. 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 Car Dealerships
LocationWausau, Marathon County
Historical UseCar Dealerships
Est. Operating Since1955
DNR ProgramLeaking UST Program
Contamination & Investigation
Site Assessment Summary
ContaminantsNaphthalene and petroleum hydrocarbons from an unregistered underground storage tank in soil and groundwater
Regulatory ProgramWisconsin DNR — NR 700
BRRTS #03-37-599516

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.

The automobile dealership operations that generated this contamination began in the mid-1950s and continued through the late 1970s, placing the underground storage tank installation and petroleum handling squarely in the pre-1986 window. The groundwater investigation, site remediation, and long-term monitoring required under Wisconsin DNR LUST program oversight — particularly given the confirmed groundwater impact and eastward flow toward the Wisconsin River — represent future costs that those historical carriers 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.

Request more information on this property

Contact Us

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