Barrel (unit) continued to use the same size barrels. In the worldwide oil industry, an oil barrel is defined as 42 US gallons, which is about litres or 35 imperial gallons. Oil companies that are listed on American stock exchanges typically report their production in terms of volume and use the units of bbl, Mbbl (one thousand barrels), or MMbbl (one million barrels) and occasionally for widest comprehensive statistics the Gbbl (or sometimes Gbl) denoting a billion. There is a conflict concerning the units for oil barrels (see ). For all other physical quantities, according to the International System of Units, the
Imperial Oil (Superfund site) and PCBs. The surface soil is contaminated with heavy metals including chromium, lead, and arsenic, and PCBs. Surface water contained arsenic. On April 15, 2004 - properties adjacent to the Imperial Oil Superfund site in Marlboro Township were the focus of a clean-up. More than 18,000 cubic yards of contaminated sediment and soil were removed from Birch Swamp Brook and adjacent properties between the Imperial Oil site and Texas Road. Restoration of the brook and adjacent properties has followed in phases upon completion of excavation work. The contamination on the site affects the ground water at Englishtown Aquifer, an important