PHILADELPHIA (AP) — Pennsylvania regulators are citing Sunoco for a three recent leaks during its construction of the Mariner East 2 pipeline project.

The Department of Environmental Protection last week issued violation notices for two leaks of drilling fluid on Nov. 11, in Chester and Berks counties.

One caused a 6-foot diameter sinkhole in a backyard.

The other involved using an unauthorized method to go underneath a waterway.

The third citation is for a Nov. 10 leak in a Dauphin County wetland.

Construction is underway on the 350-mile pipeline that terminates in Marcus Hook.

It's expected to be completed sometime next year.