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Piedmont region drinking wells exceed North Carolina's hexavalent chromium standards（图）
Piedmont region drinking wells North Carolina hexavalent chromium standards
2019/12/2
A new study that combines measurements from some 1,400 drinking water wells across North Carolina estimates that more than half the wells in the state's central region contain levels of cancer-causing...
Occupational Safety & Health Administration settles Building and Construction Trades Department challenge to hexavalent chromium standard
chromium standard occupational safety
2007/4/25
April 19, 2007，WASHINGTON -- The U.S. Department of Labor’s Occupational Safety and Health Administration (OSHA) signed an agreement April 6, 2007, with the Building Construction Trades Department (BC...