Tesoro Corp was incorporated in Delaware in 1968. The Company is an independent petroleum refining and marketing company in the western United States. Its subsidiaries, operating through three business segments, transport crude oil and manufacture, transport and sell transportation fuels. Its refining operating segment, which owns and operates six refineries in the western United States, refines crude oil and other feedstocks into transportation fuels, such as gasoline and gasoline blendstocks, jet fuel and diesel fuel, as well as heavy fuel oils and other residual products, for sale in wholesale and bulk markets to customers within its markets. Its retail operating segment sells transportation fuels and convenience store products in 17 states through a network of 2,267 retail stations, under the Tesoro, Shell, ARCO, Exxon, Mobil and USA Gasoline brands. The Company owns and operates six petroleum refineries located in the western United States and sells transportation fuels to a variety of customers. The Company operates a refined products terminal at its Martinez refinery, which includes a truck loading rack with three loading bays that allows them to receive refined products through interconnecting pipelines from the refinery and ship refined products blended with available renewable fuels via trucks. It also exports gasoline and diesel fuel to certain foreign markets. Its bulk sales are to independent unbranded distributors, other refining and marketing companies, utilities, railroads, airlines and marine and industrial end-users. These products are distributed by TLLP and third-party pipelines, ships, barges, rail cars and trucks. The Company is subject to extensive and frequently changing federal, state, regional and local laws, regulations and ordinances relating to the environment, including those governing emissions or discharges to land, air and water, the handling and disposal of solid and hazardous wastes and the remediation of contamination.