Standards of Performance for New Stationary Sources Rescission of Alternate Opacity Standard for Omaha Public Power DistrictNebraska City Power Station, Nebraska City, NE

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The EPA is rescinding the alternate opacity emission limit established for the Nebraska City Power Station in Nebraska City, Nebraska, owned and operated by Omaha Public Power District (OPPD). Performance testing showed the power plant can now meet both the particulate and opacity limits set forth in the regulation; thus, an alternate opacity limit is no longer necessary. Under this rule, the opacity limit for the Nebraska City Power Station would be changed from 30 percent (with a maximum of 37 percent for not more than six minutes in any hour) to 20 percent (with a maximum of 27 percent for one six- minute period per hour). The EPA is publishing this action without prior proposal because the Agency views this as a noncontroversial amendment and anticipates no adverse comments. However, in a separate document in the Federal Register publication, the EPA is proposing to approve the rule should adverse or critical comments be filed. If the EPA receives such comments, this action will be withdrawn before the effective date by publishing a subsequent document that will withdraw the final action. All public comments received will then be addressed in a subsequent final rule based on th