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Testing continues for PCBs in Lake Anna Date published: 10/27/2004
Fake fish may help scientists track contamination levels
Scientists plumbing the depths of Lake Anna for PCB contamination are getting some help from fake fish. Earlier this month, researchers with the Virginia Department of Environmental Quality submerged 10 of the sensors in the lake and several of its feeder streams. The devices, which look more like half-gallon thermos bottles than bass or catfish, absorb pollutants in the water for 28 days. The equipment approximates fish tissue and analysis of the faux fish may indicate the level of PCB contamination in real fish. Unlike most fish, the fakes rest on the bottom. Researchers have used the canisters, known as semi-permeable membrane devices, in streams elsewhere in Virginia, but the technology is relatively new. For more details, read Thursday's Free Lance-Star. To reach RUSTY DENNEN: 540/374-5431 rdennen@freelancestar.com
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