Federal workplace safety inspectors found that a contractor did not properly build scaffolding during renovation work at the Somerville train station, exposing workers to potential fall hazards, according to the Department of Labor.

The Occupational Safety and Health Administration cited Beno Stucco Systems of Rochelle Park for four repeat violations and one serious violation, and proposed fines of $69,300.

A Beno representative said the firm would dispute the charges and the penalty.

The allegations stem from an OSHA inspection at the train station in November. The repeat violations charge that the company failed to fully plank scaffold platforms, erect scaffolds on a firm foundation, provide a fall protection system and properly brace scaffolds with cross braces.

The serious violation stems from an alleged failure to conduct frequent and regular inspections of the job site.

The company was cited for repeat violations because it faced similar citations in 2009 at a job site in Paterson. Two of the citations were also duplicated in 2007 at a workplace in Palisades Park, an OSHA spokeswoman said.

In both cases the company negotiated a settlement, paying $12,000 in fines for the Paterson case and $7,000 for the Palisades Park case, the spokeswoman said.

The company representative said no workers were hurt in those incidents.

"Beno Stucco Systems' refusal to implement proper fall protections reflects a careless approach to workplace safety, leaving workers at risk of serious injury and possible death," said Patricia Jones, director of OSHA's area office in Avenel, in a statement. "The company must take immediate steps to eliminate these hazards."

OSHA said the company has been added to its Severe Violator Enforcement Program, intended to focus enforcement on repeat offenders.