In late February, the Sierra Club and the Grand Canyon Trust filed suit against the Mohave Generating Station and its owners for degrading air quality and reducing visibility in the Grand Canyon. The suit alleges that the plant has, for five years, violated various State Implementation Plan (SIP) limits for opacity, sulfur dioxide and particulate mass emissions. Violation of SIP excess emissions reporting requirements is also alleged. The suit claims that continuous opacity monitor and continuous emissions monitor readings, as well as other data, support the violations.
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