Tag: 上海后花园ND

State urges monitoring of pollution by Alcoa

first_imgo What: A hearing on the state Department of Ecology’s proposed cleanup action plan for the old Alcoa site at 5701 N.W. Lower River Road in Vancouver.o When: 6:30 p.m. Thursday, Oct. 28.o Where: Foster Auditorium, Clark College.o See the documents by clicking here.State environmental regulators are proposing to allow Alcoa to monitor pollution leaching from an old landfill on the site of its former Vancouver aluminum smelter, rather than requiring an expensive cleanup.The final cleanup action plan, to be released today for a 30-day public review, represents the last step to address Alcoa’s lingering industrial legacy along the Columbia River.It follows last year’s $10 million cleanup of a shoreline tainted with high levels of polychlorinated biphenyls, or PCBs.The state Department of Ecology isn’t proposing to force such an expensive remedy for the old unlined landfill 50 feet back from the Columbia’s shoreline. Instead, the Pittsburgh-based company will be required to monitor groundwater polluted with trichloroethylene, or TCE, until it ultimately dissipates into the river.TCE is a type of industrial solvent that, like PCBs, is a suspected carcinogen.The level of TCE in the groundwater below the landfill is above the state’s cleanup threshold, but officials contend that it’s impractical to force a cleanup that’s estimated to cost $22 million to $24 million.last_img read more