Federal officials have cited a national agricultural marketing firm based in Omaha, Nebraska, with exposing workers to grain dust and fall hazards in western Kansas.

The Occupational Safety and Health Administration has proposed penalties of $47,300 for The Scoular Company after identifying one repeat and four serious violations. An OSHA news release says the citations stem from a December 2015 investigation of a facility in Tribune, Kansas.

OSHA described platforms that lacked guardrails and open-sided work platforms in a news release. The release also said that employees were exposed to grain dust explosion hazards.