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The oil that flows on...

Enbridge Line 5 and line 6 are tarsands diluted with natural gas condensate which is commonly called dilbit. The most common diluent used to dilute bitumen is natural gas condensate (NGC), especially the naphtha component. Shippers dilute bitumen before shipment in order to meet viscosity and density requirements found in common carrier pipeline tariff rules. With a maximum density of 0.94, diluted bitumen is lighter than freshwater (density 1.00) and seawater (density 1.03). This means dilbit spilled into fresh, brackish, or saltwater will float on the surface of the water unless another mechanism, such as wave action, mixes it into the water column, as would be the case for any oil. Which makes it very easy to capture in clean-up operations during an oil spill. Only after extensive weathering may some portion become submerged or sink in freshwater, without invoking additional parameters that can modify the density of the spilled product.





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