Ansul's initial activities included production of cattle feed, refrigerants and selected specialty chemicals.

The name Ansul comes from ANhydrous SULfur dioxide (SO2), which was sold to die works and fruit preservers, and later as a refrigerant.

[9] Ansul was created by Francis "Frank" G. Hood from the bankrupt Bastol Company, an enterprise started in Marinette in 1912.

[12] (No trade names known in this category) 2001: In certain circumstances, seemingly isolated to McDonald's restaurants, detection cables in R-102 systems can fray, fatigue, and fail.

[19] Ansul et al. were named as defendants in a 2005 lawsuit alleging that the use of Agent Orange by the U.S. military led to birth defects for Vietnamese children.

The court also ruled the British had previously used Agent Orange during the Malayan Emergency in the 1950s and that they set the precedent for America's use during the Vietnam War.

[24] These discharges and contaminations were the result of an accumulation of more than 95,000 short tons (86,000 t) of arsenic salt that was at one time stored on site.

The Tyco proposal also includes capping ≈3.5 acres (14,000 m2), leaving 100,000 cubic yards (76,000 m3) of contaminated sediment in place.

Tyco hired Sevenson Environmental Services of New York as the general contractor for the project, which began in July 2012.

[31] The arsenic contamination of the river bed has been problematic for a neighboring corporation, Marinette Marine (MMC).

[24] The United States Army Corps of Engineers (USACE) estimated in 1986 that 40,000 cubic yards of sediment would need to be dredged.

[33][34] USA Today reported that Marinette schools are in the top 5 percentile for the most exposure to air pollution.