The corporation resisted that idea and lobbied for decades to block a series of clean-up plans. Photo: Peretz Partensky, Creative Commons, some rights reservedIn the years since, environmental groups like Andy Mele's Sloop Clearwater called for GE to remove the PCBs. Most scientists now think PCBs cause cancer and the substance was banned in 1977.ĭredging the Hudson River. More than a million pounds of the chemical washed downstream, reaching as far as New York Harbor. For three decades, General Electric's factories here poured untreated PCBs directly into the Hudson. In the late 40s, polychlorinated biphenyls were considered an essential chemical, used to make a wide range of electrical equipment. Thompson Island Pool lies at the head of the 200-mile stretch of contaminated water, one of the legacies of America's postwar industrial boom. We're looking at ground zero of America's largest Superfund site.” He said, “Sitting literally at our feet is probably 150,000 pounds of polychlorinated biphenyls. Then, Mele pointed to where the brown, silt-filled water mingles with chunks of ice. Nearby, a trickle of snowmelt formed a waterfall. On the far shore, wood ducks moved in a line under budding trees. We're looking out at the Thompson Island Pool.” It's very early spring, and there's still some snow on the ground. Photo: David Chanatry.Mele said, “We're in a river valley, fairly flat, low rolling hills. We’re responsible for coordinating navigational warnings issued and broadcast into NAVAREA XVII and NAVAREA XVIII in the Canadian Arctic.The first day of dredging to remove PCB-laden sediments from the upper Hudson River in 2009. They’re broadcast over satellite and remain in force until cancelled or transmitted by other means.
NAVAREA warnings contain information specific to ocean-going mariners. Vessels may refer to Radio Aids to Marine Navigation or search the navigational warnings website for broadcast information.You can also sign up for regular subscriptions to specific warnings using these criteria: MCTS centres broadcast the navigational warnings for 7 days on their continuous marine broadcast (CMB) service.
These warnings are posted on the navigational warnings website and remain in effect until cancelled or until covered by a Notice to Mariners (NOTMAR). Marine Communications and Traffic Services centres broadcast navigational warnings containing urgent information.These warnings cover the establishment, condition or change in condition of: Navigational warnings (NAVWARNs) replace Notices to Shipping (NOTSHIPs) and shall be construed as Notices to Shipping. Navigational warnings (NAVWARNs) contain information for boaters about changes to navigational aids and current marine activities or hazards, such as:Ĭontact your nearest Marine Communications and Traffic Services centre for more information about navigational warnings.
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