The whistleblowers said that in March, Garry Kaufman, the division’s director, banned its modeling staff from conducting any review of EPA standard compliance in the case of hourly emissions standards for nitrogen dioxide and sulfur dioxide, three-hour standards for sulfur dioxide, and daily standards for particulate matter smaller than 2.5 micrometers, known as PM2.5. Attorneys with Public Employees for Environmental Responsibility said in a letter to CDPHE Executive Director Jill Hunsaker Ryan that a “shocking number” of previous permits were approved despite modeling analysis showing violations of the EPA standards.
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