The settlement resolves allegations in legal complaints by state and federal officials that, between April 2015 and April 2021, the facility violated the effluent limitations 273 times for pollutants such as fecal coliform, suspended solids, and solids.

They also alleged unauthorized discharges of sulfuric acid and discharges of partially treated landfill leachate to tributaries of the Hudson River, such as Coeymans Creek and Hannacroix Creek. Sulfuric acid is used to reduce the alkalinity from kiln dust that ends up in holding ponds.

During negotiations with state and federal officials, Holcim made substantial improvements to its stormwater and leachate management practices to address the violations at issue.

That included the demolition and removal of two failing slurry basins, and installing an impermeable geomembrane-backed drain along a portion of the perimeter of its landfill. The company has also agreed to undertake additional measures.