The owners of a suburban Massachusetts chemical plant that exploded in 2006, destroying dozens of homes, have agreed to pay the federal government an estimated $1.3 million to help cover the cost of cleaning up the hazardous waste that was left behind.

The Environmental Protection Agency said a consent decree unveiled Monday requires the companies to pay for some of the $2.7 million spent by the agency to clean up the site after the explosion in Danvers, a town about 25 miles north-northeast of Boston.

The EPA said the action resolves claims against former operator CAI Inc. and property owners Sartorelli Realty LLC and Roy Nelson, of the Nelson Danvers Realty Trust.

The EPA also announced that CAI will pay $100,000 to settle allegations that conditions at the facility violated the federal Clean Air Act. The $1.3 million includes cash and the net proceeds from the sale of the property, assuming the property sells for its appraised value, the agency said.

A series of explosions at the ink and paint factory shared by CAI and Arnel Co. Inc. on Nov. 22, 2006, damaged 270 local homes and businesses. No one was killed or seriously injured.