US-based Tesoro Logistics (TLLP) has amended the purchase agreement of Chevron Pipe Line’s Northwest Products System from $400m to $355m.

TLLP said the agreement has been amended as a result of the diesel fuel release, which occurred near Willard in Utah, US, on 18 March 2013.

Chevron Pipe Line will bear liabilities and responsibility for the Northwest Products System for a period of two years, and include remediation of the diesel fuel release site.

The Northwest Products System includes Northwest Product Pipeline and a 760-mile common carrier products pipeline, which extends from Salt Lake City, Utah to Spokane, Washington.

The common carrier pipeline is regulated by the Federal Energy Regulatory Commission (FERC).

It also includes a five-mile jet fuel pipeline to the Salt Lake City International Airport and the Northwest Terminalling Company, which consists of refined products terminals in Boise and Pocatello, Idaho and Pasco, Washington, will not be subject to FERC regulation.