A Ronkonkoma painting and stucco contractor is facing $460,350 in fines for safety violations, its sixth penalty since 2008, the U.S. Labor Department said Tuesday.

The fine total is the largest so far for Painting and Decorating Inc., the department said. The citation came after a March inspection by the Westbury office of the U.S. Occupational Safety and Health Administration turned up alleged violations at a work site in Manhasset. The violations were similar to those found in previous inspections, said OSHA, which is a unit of the Labor Department.

The new allegations include improperly inspected scaffolding; hazards such as missing cross braces and planks on scaffolding; a lack of fall protection for workers and a lack of protective helmets; and no protection against falling objects.

"The sizable fines proposed reflect the ongoing failure and refusal by this employer to provide basic safeguards for its employees," said Anthony Ciuffo, OSHA's Long Island area director.

The company's owner could not be reached for comment.

OSHA is proposing a $429,660 fine for what it called 10 repeat citations. And it is proposing $30,690 for five "serious citations."

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OSHA has yet to collect all of the previous fines from the company and has referred the case to the U.S. Treasury Department, the Labor Department said.

The company has now been placed in OSHA's Severe Violator Enforcement Program, which requires follow-up inspections to ensure compliance.

After receiving notice of a proposed fine, a company has 15 business days to contest the findings.