Figure 3: The Ballast-Check 2’s Activity parameter correlated with Walz Water PAM fluorometer’s Yield estimate. Samples with abundances < 5 cells/ml have been omitted from the data set in this figure.

Millions of fluorescent light ballasts containing PCBs probably remain in schools and day care centers across the U.S. four decades after the chemicals were banned over concerns that they could cause ...

Vermont Department of Environmental Conservation officials are asking state legislators for a two-year extension on the deadline to test schools for airborne PCBs. They say the extra time will allow ...

Even though polychlorinated biphenyls (PCBs) have not been manufactured in the U.S. for over forty years, they continue to be present in building materials, including in caulk and joint materials, ...