The Sierra Club says Ameren has been routinely violating air quality standards at its St. Louis-area power plants.
In a Notice of Intent to Sue delivered to Ameren on Wednesday afternoon, the Sierra Club alleges the company's Labadie, Meramec, and Rush Island plants have exceeded air pollution limits almost 10,000 times since 2008.
According to the EPA, approximately 140,000 tons of ash containing heavy metals and other toxic substances contaminated Jefferson County wetlands, an unnamed tributary to Plattin Creek and a portion of Willers Lake.
Environmental groups are once again urging state officials to require groundwater monitoring at Ameren’s coal-fired power plants in eastern Missouri.
The Sierra Club and Labadie Environmental Organization submitted a letter to the Missouri Department of Natural Resources on Thursday asking the state not to allow Ameren to build new coal ash landfills before testing groundwater for contamination.
The Missouri Department of Natural Resources will hold another public awareness session Aug. 14. This one will focus on the permitting process for a proposed coal ash landfill at Ameren's Meramec power plant near Arnold, Mo.
The proposed landfill site is located at 8200 Fine Road, approximately 3.6 miles southeast of the intersection of Interstate 55 and Route 141. Ameren is preparing a detailed site investigation work plan. The session is scheduled for 6:30 p.m. at Rogers Elementary School, 7700 Fine Road in St. Louis.
Representatives of MDNR and Ameren will be available to answer questions.
Ameren Missouri is asking a federal judge to dismiss a lawsuit filed against the company by the US Environmental Protection Agency.
The suit filed in January alleges that Ameren violated the Clean Air Act by making multi-million-dollar modifications to its coal-fired power plant in Festus without installing required pollution controls and obtaining the necessary permits.