ST. LOUIS — A $47 million settlement has been reached in an explosion that launched a van-sized boiler through the roof a St. Louis box company and onto a nearby laundry business, killing four people and injuring three more.

The Simon Law Firm said in a news release that the settlement was reached last month during mediation in advance of a trial that had been scheduled for August. KSDK-TV reports that it covers multiple wrongful death, personal injury and property damage cases.

The April 3, 2017, explosion inside the Loy-Lange plant killed Kenneth Trentham, who was working there. The nearly 2,000-pound (900 kilograms) tank then flew into nearby Faultless Healthcare Linen, killing Christopher Watkins, Tonya Gonzalez-Suarez and Clifford Lee.

The victims' attorneys blamed "a prolonged series of errors" that included deficient repairs.