 NORWELL, Mass.--BUSINESS WIRE--Clean Harbors, Inc. Clean Harbors NYSE: CLH, the leading provider of environmental and industrial services throughout North America, today announced financial results for the second quarter ended June 30, 2021. Our second-quarter financial results far exceeded our guidance, as we benefitted from a steady flow of high-value waste streams into our disposal network and a strong performance within our Safety-Kleen Sustainability Solutions business, said Alan 