APPENDIX F1

Summary

Inventory Comparison

2007/2008/2025

Bureau of Air Quality

Department of Environmental Protection
[This page intentionally left blank.]
Appendix F-1

Inventory Comparison - 2007/2008/2025

The 2007, 2008 and 2025 emission inventories were evaluated to show that the 2007 emission

inventory is an appropriate and representative emission inventory to use as a surrogate attainment 

emission inventory for the 2008 emission inventory for the Pennsylvania portion of the PhiladelphiaWilmington PA-NJ-DE PM2.5 nonattainment area for the 2006 24-hour PM2.5 National Ambient Air 

Quality Standard (NAAQS). The 2007 and 2025 emission inventories were developed for MARAMA in a 

regional effort that Pennsylvania participated in to refine the emissions inventory and to compile a 

regional emissions inventory. See Appendix C for detailed inventory methodology information for 2007 

and 2025 inventories. Emissions for point, area and nonroad sectors for the 2008 emission inventory 

are from the 2008 National Emissions Inventory (NEI) Version 2. Emissions for the highway vehicle 

sector for 2008 were generated using the MOVES model. A detailed methodology description for the 

MOVES model is available in Appendix D.

A summary of the 2007, 2008 and 2025 emission inventories is displayed in Table 1. The inventory 

analysis shows that the 2007 emission inventory is comparable to the 2008 emission inventory for the 

Pennsylvania portion of the Philadelphia PM2.5 nonattainment area. PM2.5, SO2, NOx and NH3 are 

lower in 2008 by 2.2%, 15.5%, 11.1% and 4.4%, respectively. VOC emissions are higher in 2008 by 1.9%. 

A comparison of the MARAMA 2007 inventory to the MARAMA 2025 inventory shows a decrease in 

PM2.5, SO2, NOx, VOC and NH3 emissions from 2007 to 2025. A comparison of the 2008 NEI to the 

MARAMA 2025 inventory also shows decreases in PM2.5, SO2, NOx and VOC. In the 2008 to 2025 

inventory comparison, NH3 emissions increase slightly by 1.3%, which is not a concern because 

ammonia emission are very small compared with other pollutant emissions. 

The inventory analysis shows that a decreasing trend in emissions is anticipated through 2025 from a 

2007 inventory base year and from a 2008 inventory base year. Therefore, both the 2007 and 2008 

emission inventories satisfy the maintenance demonstration criteria provided in EPA guidance that a 

state may demonstrate maintenance of a NAAQS by showing that future projected emissions are less 

than or equal to the attainment year. ((See, EPA, “Procedures for Processing Requests to Redesignate 

Areas to Attainment,” John Calcagni (September 4, 1992) (Calcagni Memo)).
Table 1 Comparison of 2007/2008/2025 Emission Inventories

2007 PM2.5 SO2 NOX VOC NH3

Point 2,522 19,633 20,744 6,281 743

Area 7,722 15,005 12,925 47,568 3,293

Highway Vehicle 2,386 508 69,327 29,293 1,270

Nonroad 1,562 3,375 20,393 18,751 23

2007 TOTAL 14,192 38,520 123,390 101,894 5,329

2008 PM2.5 SO2 NOX VOC NH3

Point 1,545 16,209 19,090 5,784 587

Area 9,007 15,589 14,953 51,004 3,309

Highway Vehicle 2,155 418 62,890 26,910 1,183

Nonroad 1,176 317 12,770 20,173 15

2008 TOTAL 13,883 32,534 109,703 103,871 5,094

2025 PM2.5 SO2 NOX VOC NH3

Point 1,887 5,858 11,316 6,506 789

Area 7,047 9,186 12,675 44,530 3,436

Highway Vehicle 1,145 259 23,056 11,222 908

Nonroad 897 532 11,494 12,193 29

Emission Reduction Credits 650 6,361 5,198 1,086 0

2025 TOTAL 11,626 22,197 63,738 75,536 5,162

PM2.5 SO2 NOX VOC NH3

Difference Between 2007 and 2008 -309 -5,987 -13,687 1,977 -234

% Difference Between 2007 and 2008 -2.2 -15.5 -11.1 1.9 -4.4

Difference Between 2007 and 2025 -2,567 -16,324 -59,651 -26,357 -167

% Difference Between 2007 and 2025 -18.1 -42.4 -48.3 -25.9 -3.1

Difference Between 2008 and 2025 -2,257 -10,337 -45,965 -28,334 67

% Difference Between 2008 and 2025 -16.3 -31.8 -41.9 -27.3 1.3
APPENDIX F2

Inventory Comparison

Point, Area and Nonroad

2008

(Provided in Electronic Form Only)

Bureau of Air Quality

Department of Environmental Protection
[This page intentionally left blank.]
Sum of Total Emissions Column Labels

Row Labels Ammonia Carbon Monoxide Nitrogen Oxides

Bucks 3.096037136 42088.40402 2515.6492

Chester 3.021978895 35078.9476 2507.762602

Delaware 1.662116532 24139.106 1290.83316

Montgomery 4.343789836 60646.84212 3588.059329

Philadelphia 3.164830925 36467.00345 2868.182153

(blank)

Grand Total 15.28875332 198420.3032 12770.48644
PM10 Primary (Filt + Cond) PM2.5 Primary (Filt + Cond) Sulfur Dioxide Volatile Organic Compounds

260.6394124 239.7881716 62.81733303 4450.512083

269.1627372 247.6297436 64.0511358 3615.439775

134.8030264 124.0187565 33.20365044 2533.887877

368.4088557 338.9361148 88.46221834 5825.978044

245.1329663 225.5222423 68.46464124 3746.710523

1278.146998 1175.895029 316.9989789 20172.5283
(blank) Grand Total

49620.90626

41786.01557

28257.51458

70861.03048

43624.18081

234149.6477
APPENDIX F3

Inventory Comparison

MOVES

2008

(Provided in Electronic Form Only)

Bureau of Air Quality

Department of Environmental Protection
[This page intentionally left blank.]
PM2.5 24-Hr NAAQS 2008 Baseline Emissions Inventory

Emission Summary

 Annual (Tons/Year)

County VMT Speed (mph) PM2.5 PM10 VOC CO NOX SO2

Lehigh 2,892,020,828 40.4 279.89 341.43 3,443.66 42,406.01 8,306.96 53.44

Northampton 1,995,474,468 39.5 203.08 248.37 2,918.35 34,101.13 6,034.57 37.73

Lehigh Valley MPO 4,887,495,295 - 482.97 589.80 6,362.01 76,507.15 14,341.53 91.17

County VMT Speed (mph) PM2.5 PM10 VOC CO NOX SO2

Cumberland 2,823,779,319 43.4 337.04 395.71 2,839.24 36,802.48 9,726.55 58.02

Dauphin 3,058,655,433 43.8 301.06 360.51 3,242.73 41,168.82 8,974.24 57.01

Lebanon 1,208,798,268 44.0 142.11 166.86 1,447.40 17,274.14 4,182.03 24.58

York 3,266,844,499 41.6 322.00 391.40 4,426.68 52,474.84 9,664.44 60.79

Harrisburg MPO 10,358,077,520 - 1,102.21 1,314.48 11,956.05 147,720.27 32,547.26 200.41

County VMT Speed (mph) PM2.5 PM10 VOC CO NOX SO2

Cambria 1,119,177,454 37.1 98.84 122.52 1,476.40 16,948.13 3,075.02 19.94

Indiana (P) 126,497,138 37.3 17.44 20.15 138.43 1,603.38 490.36 2.67

Johnstown MPO 1,245,674,593 - 116.28 142.67 1,614.83 18,551.51 3,565.39 22.61

County VMT Speed (mph) PM2.5 PM10 VOC CO NOX SO2

Lancaster 4,235,226,742 40.8 432.70 524.61 5,080.30 61,340.54 12,614.07 79.78

County VMT Speed (mph) PM2.5 PM10 VOC CO NOX SO2

Allegheny (P) 111,964,053 21.6 10.61 14.77 150.61 1,980.38 273.43 2.04

County VMT Speed (mph) PM2.5 PM10 VOC CO NOX SO2

Bucks 5,013,159,432 42.8 384.50 472.37 5,008.85 57,762.13 11,824.59 76.63

Chester 4,399,039,154 44.1 352.67 432.46 3,991.49 47,354.11 10,461.17 68.25

Delaware 3,780,823,176 38.3 291.55 369.74 3,955.83 45,532.15 8,730.20 58.43

Montgomery 6,880,453,128 40.4 518.98 649.97 6,582.79 77,342.84 15,673.17 105.02

Philadelphia 5,952,792,937 23.5 607.09 815.35 7,371.46 80,331.81 16,200.59 109.83

Philadelphia MPO 26,026,267,826 - 2,154.80 2,739.89 26,910.42 308,323.04 62,889.72 418.15

County VMT Speed (mph) PM2.5 PM10 VOC CO NOX SO2

Allegheny (P) 9,225,051,123 30.4 695.17 901.88 9,287.17 133,897.40 20,151.86 147.78

Armstrong (P) 56,327,449 32.9 7.33 8.50 49.13 688.17 198.71 1.10

Beaver 1,432,046,440 37.8 116.73 147.75 1,505.49 21,288.52 3,349.63 23.37

Butler 1,743,891,589 44.1 154.94 186.99 2,111.11 29,133.09 4,731.56 29.37

Greene (P) 27,029,263 29.5 2.39 2.84 22.16 284.12 74.79 0.47

Lawrence (P) 115,269,350 50.0 13.72 15.73 58.35 970.45 399.71 2.32

Washington 2,110,542,593 43.3 193.57 233.31 1,982.72 29,056.00 5,587.12 36.18

Westmoreland 3,424,110,300 41.0 330.78 400.92 3,372.80 48,246.62 9,415.21 60.08

SPC MPO 18,134,268,107 - 1,514.62 1,897.92 18,388.94 263,564.36 43,908.59 300.67

Appendix C-2 1
NH3

134.87

93.11

227.98

NH3

129.78

141.76

55.18

151.12

477.83

NH3

51.85

5.78

57.64

NH3

195.42

NH3

4.88

NH3

222.79

195.51

169.60

307.44

287.16

1,182.51

NH3

404.79

2.37

62.21

76.10

1.29

5.43

92.27

147.74

792.20

Appendix C-22