11. Such bodies are sources of environmental contamination by toxic lead. 12. The environmental contamination sites were inherited by Anadarko after it purchased Kerr-McGee in 2005. 13. Saleko said there was concern about environmental contamination and its effect on subsistence foods. 14. This legislation aimed to inform and protect communities that are threatened with environmental contamination . 15. In 1998, the yard was listed as a Superfund site due to environmental contamination . 16. The accident resulted in 17 deaths and massive environmental contamination . 17. These methods may be used by camel herders to minimize risk of environmental contamination . 18. Shipping authorities have confirmed that the Jessica was not insured for environmental contamination , he said. 19. "There was no environmental contamination because these substances, fortunately, were in containers, " she said. 20. The Air Force has pledged to be responsible for most environmental contamination on the base.