The property owner of the Ambler boiler house removed approximately 900 tons of asbestos-containing material from the site last week.

The material was removed last weekend from June 19 to June 21, according to Lynda Rebarchak, community relations coordinator for the Pennsylvania Department of Environmental Protection's Southeast Region.

"The material left the site in about 37 trailers, and it was covered with a tarp prior to leaving the site," she said. "It was shipped to a facility in Ohio that is permitted to accept that type of waste."

The removal was mandated by the DEP last year.

"We had been in contact with the property owner for that parcel, Ronald Hamilton," Rebarchak said. "Back in December of 2009, we had issued an order to Mr. Hamilton requiring that he remove some material that had been stockpiled on site. ... It was demolition material from work that was done back in May of 2009. There was some roofing material and some other material that had been located inside the property.