Contesting the fines and citations will not impact OSHA's decision to place the company in its Severe Violator Enforcement Program, which mandates follow-up inspections to ensure compliance with the law, an agency spokesman said.
The 90-year-old Wynnewood refinery employs about 265 workers.
A widow of the one of the workers killed in the blast said she found the company's decision to appeal the fines and citations troubling.
“They took two lives,” said Kari Smith, of Pauls Valley. “I know that's their right to contest it, but my kids no longer have their stepdad, my youngest no longer has a father and I no longer have my husband. It's just not right.”