40 CFR 60.6450: What emission limits must I meet? By when?

(a) You must meet the emission limits specified in Table 3 to Subpart WWWW. You must meet the limits no later than March 10, 2031.

(b) The visible emissions of combustion ash discharged to the atmosphere from an ash conveying system (including conveyor transfer points) must not exceed 5 percent of the observation period (i.e., 9 minutes per 3-hour period), as determined by EPA Reference Method 22 observations as specified in § 60.6530(a). You must meet the limits no later than March 10, 2031. This visible emission limit does not cover visible emissions discharged inside buildings or enclosures of ash conveying systems; however, the visible emission limit does cover visible emissions discharged to the atmosphere from buildings or enclosures of ash conveying systems. This visible emissions limit does not apply to visible emissions that occur during repair and maintenance of the combustion ash conveying systems while the municipal waste combustor is not operating.