If you fish on Lake Norman, you may have heard about a new warning this week from state and county health officials. They advise most people not to eat striped bass from the lake more than once a week, and for pregnant women and children to avoid the fish altogether. It’s because they’ve detected PCB’s in the fish. These chemicals, once common industrial lubricants, were banned in 1979 because they were found to cause birth defects and to be a likely cause of cancer. PCB’s have been a problem in other bodies of water for years, but this is the first warning about them in Lake Norman. So we called Captain Gus Gustafson. He’s been taking people fishing on Lake Norman for more than 20 years.