A camera lowered into a hole discovered Thursday near a Hanford waste storage tank found it was only three feet deep.
“It’s believed the cause of the hole is poor soil compaction and water drainage around a rock in the ground,” said contractor Washington River Protection Solutions.
One or more workers called a halt to work on Friday in the SX Tank Farm out of concern that the sinkhole, which was being investigated, might indicate a problem with a tank just six feet away in the tank farm. Workers can issue a “stop work” order if they have safety concerns.
The contractor had been prepared to do a video inspection of the interior of the tank, but canceled the work since there was no remaining concern about the nearby tank.
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Work resumed in the SX Tank Farm on Monday, with the exception of a 20-foot-area around the 2-foot-diameter hole.