Antea Group was contracted by the owner/operator of a 400-mile interstate pipeline system to manage legacy environmental liabilities, and provide ongoing environmental support for active pipeline operations. The pipeline runs along a 299-mile corridor from Washington to Oregon transporting 1.3 billion gallons of refined petroleum products annually to terminals located at Seattle's Harbor Island, Seattle-Tacoma International Airport, and Portland Oregon. The legacy liabilities are located along the pipeline right-of-way, and at operating pipeline delivery, distribution and bulk storage facilities.