Tepco Says Contaminated Water Tank Leak May Have Started in July

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The leak at a contaminated water storage tank discovered last week at the Fukushima plant may have continued since last month before it was detected and the tank drained, plant operator Tokyo Electric Power Co. said.

Crews found elevated levels of radiation in July near where the leak was ultimately detected on Aug. 19, Mayumi Yoshida, a spokeswoman for the utility known as Tepco, said today by phone.