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Cleaning up…

On Friday, Clean Harbors (CLHB) , a company that specializes in environmental and waste-management services, was the best performing Nasdaq stock, climbing a whopping 46 percent in one day. That was primarily due to some strong third quarter numbers that the company reported on Friday. But you have to wonder how many investors who piled into this stock also noticed that Friday was the same day that CLHB filed two revised 10-Qs for the first and second quarters of this year. The Qs noted some pretty significant math mistakes — a 50 percent difference in net cash from operating activities — made in the prior statements of cash flows. In the Q, the company also noted that because it is unable to get “clean” numbers for its acquisition last year of a Safety-Kleen subsidiary, it does not expect to be able to issue any additional stock for the next three years.