Rather than waiting to raise defenses in subsequent cost recovery actions under section 107, PRPs directed early challenges to the selection of remedial actions, claiming, for example, that EPA had chosen unreasonably elaborate or expensive remedies.

• 不是根据第107条在随后的费用索赔中提高预防，潜在责任方却提前拒绝采用补救行为，例如，他们声称环境保护局毫无道理地选择了过分精心、过分昂贵的补救措施。