Toxicities of Selected Bridge Painting Materials and Guidelines for Bridge Painting Projects

摘要

The effects of bridge painting operations on aquatic ecosystems were studied. Bioassays using Daphnia magna, Physa gyrina, Selenastrum capricornutum, fathead minnows, and rainbow trout were performed. The results indicate that both lead pigmented and paints pigmented with zinc compounds can cause toxicity. Biocides and cleaning detergent tested were highly toxic. A set of guidelines was developed to assist highway workers in determining and mitigating the impacts of bridge painting projects on the aquatic environment. The aquatic environment is broadly defined to include all beneficial uses of water and the habitat created by the water. In the guidelines, the aquatic setting is first determined, then the nature of the project is established. From the aquatic setting and nature of the project, the Area of Potential Environmental Impact and the impacts of the project are determined. Finally, mitigation is discussed.