The three-count indictment alleges that Midwest Grain Products Inc. and Harcros Chemicals Inc. violated the Clean Air Act.
Plants in Ohio and Kansas will be closed for up to five weeks; automaker blames slumping sedan sales.
Facility manufactures and packages aerosol, liquid and other specialty chemicals.
Company will add 70 full-time workers to the 200 already working in the city once the project is completed.
Investment will pay for new equipment and technology.
Cuts affect employees at Kansas and Mexico manufacturing operations.
Investment will upgrade paint shop, purchases new stamping technologies, and reduce environmental footprint.