SAN FRANCISCO — A granite company owner is facing manslaughter charges in connection with the deaths of two employees who were killed on the job earlier this year.

Meng Peng, 66, of Hillsborough, was arrested Monday and charged with two counts of involuntary manslaughter and three violations of the labor code, the San Francisco District Attorney’s Office announced Thursday.

Peng allegedly violated workplace safety procedures that led to Philip Marich, 53, and Hector Vasquez, 46, being crushed to death by granite slabs they were removing from a shipping container on Feb. 7, according to prosecutors.

“Employers cannot simply send their workers into hazardous work conditions untrained and without the appropriate equipment,” District Attorney George Gascón said in a statement. “California employers must vigilantly assess employees’ conditions and work methods when requiring their workers to engage in dangerous tasks.”

A message left at Peng’s San Francisco-based business, Galaxy Granite, was not immediately returned.

The District Attorney’s Office said its investigation into the men’s deaths was conducted in collaboration with the California Division of Occupational Safety and Health.

Peng is currently free on $600,000 bail, according to prosecutors. He is scheduled to be arraigned Friday.

Contact Jason Green at 408-920-5006. Follow him at Twitter.com/JGreenMercNews.