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Altogether, the company says about 115 cubic meters (700 barrels) of oil and 400 cubic meters (2,500 barrels) of mineral oil-based drilling mud, used as a lubricant for drilling, were released by the two spills. The first, on June 4, seeped from a previously inactive fault and may have resulted from pressure from the well's operation, it said, describing the situation as rare. The second spill, which began June 17, was stopped within 48 hours and the well involved was permanently plugged, ConocoPhillips China said. It said it was working with the State Oceanic Administration to seal the natural fault that was a source of continuing seepage and that it was investigating the source of droplets of oil seeping from another small area near one of its well platforms. The oil spills have deepened concern over the marine environment in the Bohai, a major fisheries region that already is suffering heavy pollution from industry and agriculture. ConocoPhillips said its tests of oil particles collected from shorelines found that only two of 56 could be traced to the oil spills. Most, it said, appeared to be from fuel oil.
[Associated
Press;
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