### Appendix 9-1 of Delaware 8-Hour O z one SIP revision

Delaw a re State I m plementation Plan for At tainment of the 8-Hour Oz one National Ambient Air Quality Standard, Re vision for E s tablish m en t of 2008 an d 2009 Mobile Source Emission Budgets May 2007 This document assigns the on -road mobile source em ission s budgets for each county in Delaware as part of the Philadelphia- W ilm ington-Atlantic City, PA-NJ-MD-DE moderate non-attainm e nt area for the 8 hour ozone National Am bient Air Quality Standard (NAAQ).S Section 176 of the Clean Air Act ( 42 USC 75 06) 

### and Title 40 Parts 51 and 93 of the Code of Federal Regulations ar e the basis f o r the autho r ity to e s tab lis h mobile em is sion budgets in the Delaware Stat e Im ple m entation Plan (SIP) to attain the ozone stand a rd. The on-road m obile source em issions budgets will be m a de a part of the State Im plem entation Plan to attain the 8 hour ozone standard by the year 2009 and to reach further reasonab l e progre ss to wards attain ing th e s t an da rd by 200 8. Therefore, the tables belo w will assig n budgets for each year and for each county. The m obile s ource em issions are pro j ected for these years us ing the USEPA m obile e m ission m o del, “Mobile 6.2” for calculating em ission factors and the “Peninsula Travel De m a nd Model” for calculating future vehicle m iles traveled (V MT). Mobile 6.2 calcu lates em ission factors for each USEPA vehicle type traveling on designated f e deral highway clas sif i cation s ro ad types in Delaware. D e pending on the county, Delaware has up to 11 different fede ral highway classifications for its roads. There are two pollutants that are calculated us ing the m obile com puter m odel. Volatile organic compounds (VOC) and nitrogen oxide (NOx) em ission factors are generate d from the Mobile 6.2 co mputer m o del. These po llutants are modeled because they are the precursors to for m ground level ozone. A sa m p le em ission factor output for New Castle County for nitrogen oxides is listed below, for the projection year of 2009.

Ne w Castle County Projected 2009 Mobile E m ission Factors Nitrogen Oxides (NOx) Gram s/Mile USEPA Veh i cle Type* Federal Hi gh w ay Cl as s. L D GV L D GT 1- 2 LDGT 3- 4 HDG V L D D V L D D T HD D V M C Other Principal Ar terialRur a l 0. 5 1 0 . 3 7 0 . 4 2 0 . 3 8 0 . 1 9 0 . 2 3 0 . 2 2 3 . 3 5 Mi nor Ar teri a l -Rur al 0. 5 4 0 . 3 9 0 . 4 4 0 . 4 2 0 . 2 0 0 . 2 5 0 . 2 5 2 . 7 5 Ma j o r Col l ect or- R ur al 0. 5 5 0 . 3 9 0 . 4 5 0 . 4 4 0 . 2 1 0 . 2 6 0 . 2 7 2 . 7 9 Mi nor C o l l ect or- R ur al 0. 5 7 0 . 4 1 0 . 4 7 0 . 4 8 0 . 2 2 0 . 2 8 0 . 3 0 2 . 9 0 L o cal - Rur a l 0. 8 3 0 . 6 0 0 . 7 0 1 . 0 8 0 . 3 7 0 . 5 1 0 . 6 6 4 . 2 1 Inters ta te- U r b a n 0. 5 2 0 . 3 8 0 . 4 3 0 . 3 9 0 . 1 9 0 . 2 3 0 . 2 3 3 . 1 9 Other Freeway & Expressways - Urb a n 0. 5 1 0 . 3 8 0 . 4 2 0 . 3 9 0 . 1 9 0 . 2 3 0 . 2 3 3 . 4 1 Other Pri n ci p a l Ar teri al - 0 . 5 5 0 . 3 9 0 . 4 5 0 . 4 4 0 . 2 1 0 . 2 6 0 . 2 7 2 . 7 9



### 1Urb a n Mi n o r 0. 5 7 0 . 4 1 0 . 4 7 0 . 4 8 0 . 2 2 0 . 2 8 0 . 3 1 2 . 9 0 Col l ect or- U rb a n 0. 5 7 0 . 4 1 0 . 4 7 0 . 4 9 0 . 2 2 0 . 2 8 0 . 3 1 2 . 9 1 L o cal 0. 8 2 0 . 5 9 0 . 6 9 1 . 0 8 0 . 3 7 0 . 5 1 0 . 6 6 4 . 2 1 

### *Description of vehicle types is at the end of this docum ent

A travel dem a nd model for the State is m a intained by th e Delaware Departm e nt of Transportation. The model applies a variet y of data regarding roadway network conditions, vehicular travel patterns, au tomobile ownership, and the location of population and e m ployment sites. The m odel follows the “tra dition a l four-step pro c es s” of trip generation, distribution, mode spl it, and assignm ent that is commonly used throughout the transportation planning industry. A sim ilar table as above is generated for VMT according to USEPA vehicle type and fe deral high way classification s . The two m a trices are incorporated to calculate tons per-day em issions for each po llutant. There are num e rous input crit eria that go into the m o bile m odel that affect the calculations. The m a jor inputs are the vehicl e em ission control program s and clean fuel standard s th at a r e cu rre ntly us ed or will b e use d f o r contro lling and r e ducing veh i cle em issions. They include: National Low Em ission Vehicle Program and Tier 2 Motor Vehicle Controls (light duty vehicles), re form ulated gas program , low sulf ur gaso lin e program , ultra-low sulf ur diesel f u el pr ogram, heavy duty engi ne control program beginning in 2007 reducing particulate m a tte r and in 2010 reducing nitrogen oxides to their lowest levels. T h e State also ha s since 1983 inspected vehicles for tailpipe em issions. Currently as part of the ve hicle em ission in specti on a vehicle on-board diagnostic system is checked for any diagnostic tr ouble codes which if present requires the vehicle to be repaired. The following tables assign the on-road m ob ile em ission budgets for m ilestone years of 2008 and 2009 for each county in D e laware.

2008 On-road Vehicle Mobile Em ission Budgets for Delaware (Emis s ion in tons per day, VMT in mil es per day) Pollutant Kent New Castl e Sussex DE Total V O C 4

. 1 4 10.6 1 7

. 0 9 21.8 4 N O X 9

. 6 8 2 1

. 3 5 1 2

. 8 6 4 3

. 8 9 V M T 5 , 5 2 0,57 3 16,9 17,0 4 0 8,45 0,95 0 30,8 88,5 6 3

2009 On-road Vehicle Mobile Em ission Budgets for Delaware (Emis s ion in tons per day, VMT in mil es per day)

Pollutant Kent New Castl e Sussex DE Total



### 2V O C 3

. 9 5 9

. 8 9 7

. 0 5 20.8 9 N O X 9

. 0 4 1 9

. 2 3 1 1

. 9 3 4 0

. 2 V M T 5 , 7 0 3,03 3 17,1 22,1 7 9 8,54 1,82 8 31,3 67,0 4 0



### Supporting docum ents, including Mobile 6.2 input, output a nd data files as w e ll as spreadsheet calculation files, can be obtained by request in writing to Philip W h eeler, Air Quality Managem e nt Section, 156 South State Street, Dover, Delaware 19904 or e-m a il Philip.W heeler@state.de.us.

Description of Vehicle Types L D G V L i g h t

- D u t y Gasoline Ve hicles (Passenger Cars) LDGT 1

- 2 Light-Duty Gasoline Trucks 1 (0-6,000 lbs. GVWR, 0-3,750 lbs. LVW ) Light-Duty Gasoline Trucks 2 (0-6,000 lbs. GVWR, 3,751- 5,750 lbs. LVW ) LDGT 3-4 Light-Duty Gasoline Trucks 3 (6,001-8,500 lbs. GVWR, 0-5,750 lbs. ALVW ) Light-Duty Gasoline Trucks 4 (6,001-8,500 lbs. GVWR, 5,751 l b s. and greater ALVW ) HDGV Heavy-Duty Gasoline V e hicles (8,501-80,000 lbs. GVWR) L D D V L i g h t

- D u t y Diesel Vehi cles (Passenger Cars) Light-Duty Diesel Vehicles (Passenger Cars) L D D T L i g h t

- D u t y Diesel Tr ucks (0-8,500 lbs. GVW R ) HDDV Heavy-Duty Diesel Vehicl es (8,501-80,000 lbs. GVWR)

M C M o t o r c y c l e s GWWR- Gr oss Vehicle Weight Rating LVW – Loaded Vehicle Weight ALVW - Adjusted Load ed Vehicle Weight

3