On March 22, 2006, EPA published a direct final rule to approve a PM10 State Implementation Plan (SIP) maintenance plan revision for the La Grande, Oregon nonattainment area and to redesignate the area from nonattainment to attainment for PM10. PM10 air pollution is suspended particulate matter with a nominal diameter less than or equal to a nominal ten micrometers. We stated in the direct final rule that if EPA received adverse comment, we would publish a timely withdrawal of the direct final rule. We received adverse comment on the direct final rule, and, therefore, in a separate action, are withdrawing our direct final rule. In a parallel notice of proposed rulemaking, also published on March 22, 2006, we stated that if we received adverse comments we would address all public comments in a subsequent final rule based on the proposed rule. This final action addresses the adverse comments we received and finalizes our approval of the SIP revision and redesignation request for the La Grande PM10 nonattainment area.