b. The data from these sites are averaged in the order described in section 2.1 of this appendix. Note that the annual mean from site #3 in year 2 and the annual mean from site #4 in year 3 do not meet the 75 percent data completeness criteria. Assuming the 38 percent data completeness represents a quarter with fewer than 11 samples, site #3 in year 2 does not meet the minimum data completeness requirement of 11 samples in each quarter. The site is therefore excluded from the calculation of the spatial mean for year 2. However, since the spatial mean for year 3 is above the level of the standard and the minimum data requirement of 11 samples in each quarter has been met, the annual mean from site #4 in year 3 is included in the cal culation of the spatial mean for year 3 and in the calculation of the 3-year average. The 3year average is rounded to 14.4 μg/m3, indicating that this area meets the annual PM2.5 standard. Example 2-Area With Two Monitors at the Same Location That Meets the Primary Annual PM2.5 Standard. a. In an area designated for spatial averaging, six designated monitors, with two monitors at the same location (#5 and #6), recorded data in a particular 3-year period. Using Equations 1 and 2, the annual means for PM2.5 are calculated for each year. The following table can be created from the results. 205-142 D-5 b. The annual means for sites #5 and #6 are averaged together using Equation 4 before the spatial average is calculated using Equation 3 since they are in the same location. The 3-year mean is rounded to 12.6 μg/m3, indicating that this area meets the annual PM2.5 standard. Example 3-Area With a Single Monitor That a. Given data from a single monitor in an area, the calculations are as follows. Using Equations 1 and 2, the annual means for PM2.5 are calculated for each year. If the annual means are 10.28, 17.38, and 12.25 μg/m3, then the 3-year mean is: x = (1/3) × (10.28 +17.38 +12.25) = 13.303 μg/m3. b. This value is rounded to 13.3, indicating that this area meets the annual PM2.5 standard. 2.6 Equations for the 24-Hour PM2.5 Standard. (a) When the data for a particular site and year meet the data completeness requirements in section 2.2 of this appendix, calculation of the 98th percentile is accomplished by the following steps. All the daily values from a particular site and year comprise a series of values (X1, X2, X3, ..., Xn), that can be sorted into a series where each number is equal to or larger than the preceding number (X[1], X[2], X[3], X(n)). In this case, X[1] is the smallest number and x[n] is the largest value. The 98th percentile is found from the sorted series of daily values which is ordered from the lowest to the highest number. Compute (0.98) × (n) as the number "i.d", where "i" is the integer part of the result and "d" is the decimal part of the result. The 98th percentile value for year y, Po.98, is given by Equation 6: where: Equation 6 P0.98,y=X[i+1] y, Example 4-Ambient Monitoring Site With Every-Day Sampling That Meets the Primary 24-Hour PM2.5 Standard. a. In each year of a particular 3 year period, varying numbers of daily PM2.5 values (e.g., 281, 304, and 296) out of a possible 365 values were recorded at a particular site with the following ranked values (in μg/m3): Po.98,y=98th percentile for year y; 0.98 × 281=275.38⇒i+1=276⇒ P0.98,1 = X[276] = 59.0μg/m3 0.98 × 304 = 297.92⇒i+1=298⇒ Po.98,2 = X[298] = 63.0μg/m 0.98 × 296 = 290.07⇒i+1=291⇒ Po.98,3 = X[291] = 68.4 μg / m2 3 3 Subpart A-Emission Inventory Reporting GENERAL INFORMATION FOR INVENTORY 51.1 Who is responsible for actions described in this subpart? 51.5 What tools are available to help prepare and report emissions data? 51.10 How does my State report emissions that are required by the NOx SIP Call? SPECIFIC REPORTING REQUIREMENTS 51.15 What data does my State need to report to EPA? 51.20 What are the emission thresholds that separate point and area sources? 51.25 What geographic area must my State's inventory cover? 51.30 When does my State report the data to EPA? 51.35 How can my State equalize the effort for annual reporting? 51.40 In what form should my State report the data to EPA? 51.45 Where should my State report the data? APPENDIX A TO SUBPART A OF PART 51-TA BLES AND GLOSSARY APPENDIX B TO SUBPART A OF PART 51 [RESERVED] Subparts B-E [Reserved] Subpart F-Procedural Requirements 51.100 51.101 Definitions. Stipulations. 51.102 Public hearings. 51.103 Submission of plans, preliminary re view of plans. 51.104 Revisions. 51.105 Approval of plans. Subpart G-Control Strategy 51.110 Attainment and maintenance of national standards. 51.111 Description of control measures. 51.112 Demonstration of adequacy. 51.113 [Reserved] 51.114 Emissions data and projections. 51.115 Air quality data and projections. 51.116 Data availability. 51.117 Additional provisions for lead. 51.118 Stack height provisions. 51.119 Intermittent control systems. 51.120 Requirements for State Implementation Plan revisions relating to new motor vehicles. 51.121 Findings and requirements for submission of State implementation plan revisions relating to emissions of oxides of nitrogen. 51.122 Emissions reporting requirements for SIP revisions relating to budgets for NOx emissions. 51.123 Findings and requirements for sub mission of State implementation plan revisions relating to emissions of oxides of nitrogen pursuant to the Clean Air Interstate Rule. 51.124 Findings and requirements for submission of State implementation plan revisions relating to emissions of sulfur dioxide pursuant to the Clean Air Interstate Rule. 51.125 Emissions reporting requirements for SIP revisions relating to budgets for SO2 and NOx emissions. areas designated nonattainment for the 8-hour NAAQS? 51.903 How do the classification and attainment date provisions in section 181 of subpart 2 of the CAA apply to areas subject to § 51.902(a)? 51.904 How do the classification and attainment date provisions in section 172(a) of subpart 1 of the CAA apply to areas subject to § 51.902(b)? 51.905 How do areas transition from the 1hour NAAQS to the 8-hour NAAQS and what are the anti-backsliding provisions? 51.906 [Reserved] 51.907 For an area that fails to attain the 8hour NAAQS by its attainment date, how does EPA interpret sections 172(a)(2)(C)(ii) and 181(a)(5)(B) of the |