(Bloomberg) -- Valero Energy Corp. and Chevron Corp. are buying oil shipped through Canada’s newly expanded Trans Mountain Pipeline system for their California refineries, according to people familiar with the shipments, a sign that US West Coast may become a significant market for oil-sands crude.Most Read from BloombergElon Wants His Money BackNew York’s Rich Get Creative to Flee State Taxes. Auditors Are On to ThemDubai Grinds to Standstill as Flooding Hits CityIsrael Reported to Have Launche