经过20年的监管和维护，美国环境保护局和垃圾堆填区的业主正计划关闭该场所。

After 20 years of monitoring and maintenance, the 8 Environmental Protection Agency EPA and the landfill owner were making plans for the final closure of the facility. 9 Enter Ahlers.

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她还说，在1999年她告诉她的研究结果后，美国环境保护局(EPA)取消了野外生物测试的许可。

She added that the U.S. Environmental Protection Agency EPA canceled its approval for field tests using the organism once she had told them about her research in 1999. CET-6, 2005.6.

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美国环境保护局（EPA）规定，在美国销售的汽油必须含有洗涤剂，保证污染物在排出尾气管之前就被分解掉。

The US Environmental Protection Agency (EPA) requires that automotive fuels sold in the United States contain detergents to help scrub away pollution before it goes out the vehicle’s tailpipe.

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