BATON ROUGE, La. (AP) — Officials say Williams Olefins is contesting six workplace safety violations and $99,000 in civil penalties federal regulators proposed last month for a fatal explosion June 13 at the company's Ascension Parish plant.

The blast at Williams' Geismar ethylene and propylene facility killed two and injured 114 after a flammable vapor cloud ignited from ruptured equipment in the company's propylene fractionation unit, causing a massive fireball.

The U.S. Occupational Safety and Health Administration cited the company for six process safety management standard violations, including one willful.

OSHA says a willful violation is one committed with intentional, knowing or voluntary disregard for the law's requirements, or with indifference to worker safety.

Diana Petterson, an OSHA spokeswoman, tells The Advocate (http://bit.ly/1jyFM9v) Williams contested on Jan. 3 the citations outlining the violations

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