Opinion ID: 768833
Heading Depth: 4
Heading Rank: 1

Heading: introduction

Text: 104 In the rulemaking, EPA distinguished between electricity generating units (EGUs) and non-electricity generating units (non-EGUs). Council of Industrial Boiler Owners (CIBO), a trade association whose membership consists of companies and universities operating industrial boilers and turbines (industrial boilers), which constitute one category of non-EGUs, challenges the NOx SIP call for being based on the following arbitrary and capricious actions by EPA: EPA's failure to determine whether non-EGUs are significant contributors, EPA's flawed cost assumptions in its determination of cost-effective control measures for non-EGUs, EPA's erroneous calculation of non-EGU budgets, and EPA's arbitrary redefinition of the term EGU. We agree only that EPA's redefinition of EGUs was arbitrary and capricious. 105