State of North Carolina 

Pre-Hearing Draft 

State implementation Plan 

Inspection and Maintenance (I/M) Program 

Department of Environment and Natural Resources 

Division of Air Quality 

May 21, 2010 
(This page intentionally left blank)
Table of Contents 

INTRODUCTION ........................................................................................................................................ 1

A. APPLICABILITY (40 CFR §51.350) .................................................................................................. 2

B. ENHANCED I/M PERFORMANCE STANDARD (40 CFR §51.351) .............................................. 4

C. BASIC I/M PERFORMANCE STANDARD (40 CFR §51.352) ........................................................ 4

D. NETWORK TYPE AND PROGRAM EVALUATION (40 CFR §51.353) ........................................ 5

E. ADEQUATE TOOLS AND RESOURCES (40 CFR §51.354) ........................................................... 6

F. TEST FREQUENCY AND CONVENIENCE (40 CFR §51.355) ....................................................... 7

G. VEHICLE COVERAGE (40 CFR §51.356) ........................................................................................ 7

H. TEST PROCEDURES AND STANDARDS (40 CFR §51.357) ......................................................... 8

I. TEST EQUIPMENT (40 CFR §51.358) ............................................................................................... 8

J. QUALITY CONTROL (40 CFR §51.359) ........................................................................................... 9

K. WAIVERS AND COMPLIANCE VIA DIAGNOSTIC INSPECTION (40 CFR §51.360) ............... 9

L. MOTORIST COMPLIANCE ENFORCEMENT (40 CFR §51.361) ................................................ 10

M. MOTORIST COMPLIANCE ENFORCEMENT PROGRAM OVERSIGHT (40 CFR §51.362) .. 11

N. QUALITY ASSURANCE (40 CFR §51.363) .................................................................................... 11

O. ENFORCMENT AGAINST CONTRACTORS, STATIONS AND INSPECTORS 

(40 CFR §51.364) ....................................................................................................................................... 12

P. DATA COLLECTION (40 CFR §51.365) ......................................................................................... 12

Q. DATA ANALYSIS AND REPORTING (40 CFR §51.366) ............................................................. 12

R. INSPECTOR TRAINING AND LICENSING OR CERTIFICATION (40 CFR §51.367) .............. 13

S. PUBLIC INFORMATION AND COSUMER PROTECTION (40 CFR §51.368) ........................... 13

T. IMPROVING REPAIR EFFECTIV ENESS (40 CFR §51.369) ........................................................ 14

U. COMPLIANCE WITH RECALL NOTICES (40 CFR §51.370) ....................................................... 14

V. ON ROAD TESTING (40 CFR §51.371)........................................................................................... 14

North Carolina I/M SIP May 21, 2010 i 
North Carolina I/M SIP May 21, 2010 ii 

List of Appendices 

Appendix 1: MOBILE Input and Output Files 

Appendix 2: MOBILE Modeling Assumptions 

Appendix 3: I/M Budget: Fiscal Years 2010-2011 

Appendix 4: Number of Vehicles Included in the I/M Program 

Appendix 5: References 

Appendix 6: List of Abbreviations 

Appendix 7: Public Hearing Notice Report, Comments Received and Responses 
State Of North Carolina 

Implementation Plan for Inspection/Maintenance Program 

INTRODUCTION 

The State of North Carolina implemented a Motor Vehicle Inspection/Maintenance (I/M) program under 

Environmental Protection Agency (EPA) regulations in Code of Federal Regulations (CFR) 40 

CFR Part 51. The implementation of this program continues to be an integral part of North Carolina’s 

plan to attain and maintain compliance with the National Ambient Air Quality Standards (NAAQS) for 

ozone (O3) and carbon monoxide (CO). 

The Division of Motor Vehicles (DMV), License and Theft Bureau, has operational responsibility for the 

I/M program, and has created rules for implementing and monitoring the program under the North 

Carolina Administrative Code (NCAC) Title 19A 03D.05. The Division of Air Quality (DAQ) is 

responsible for monitoring the DMV’s adherence to EPA’s guidelines and reporting to EPA each year 

(per 40 CFR 51.366) detailing the activity of North Carolina’s I/M program. In addition, the DAQ 

develops specifications for the program and certifies the emissions testing equipment used in the program. 

The North Carolina I/M program began in 1982 in Mecklenburg County. From 1986 through1991, the 

program expanded to include eight additional counties, based on a “tail-pipe” emissions test. In 1999, the 

North Carolina General Assembly passed legislation to require an On-Board Diagnostic II (OBD) I/M 

program in not only the counties required to have an I/M program under 40 CFR 51.350(a), but also in 

other counties in the State that may need the additional emission reductions to achieve the 1997 8-hour 

ozone standard. Starting in October 2002, the original nine counties converted from tail-pipe testing to 

the new OBD emissions testing for all model year (MY) 1996 and newer light duty gasoline vehicles. 

The program began to expand from nine counties starting July 1, 2002 to a total of 48 counties on January 

1, 2006. At the time of full implementation of the OBD program, inspection stations were performing the 

OBD emissions test on MY 1996 and newer vehicles, and tailpipe testing for MY 1995 and older vehicles 

were discontinued. 

In 2002, North Carolina inspection stations performed over 2.5 million vehicle emission inspections. As 

the new I/M counties were added, the number of inspections was expected to rise to a high of about 3.5 

million inspections but then dip to a lower figure when all tail pipe testing ended on Dec 31, 2005. The 

actual number of OBD inspections has varied from 4.2 to 4.6 million since 2006, due to higher than 

expected fleet turnover and population growth. 

On November 1, 2008, the State ended the use of paper stickers and began the process of aligning vehicle 

inspection expiration and registration renewal dates by using electronic inspection authorizations. By 

aligning the two dates the State hopes to improve the vehicle compliance because vehicles will be 

required to have a passing OBD inspection no more than 90 days prior to the vehicle registration 

expiration date in order to renew their registration. 

North Carolina I/M SIP May 21, 2010 1 
A. APPLICABILITY (40 CFR §51.350) 

1. In North Carolina, Table 1 below lists the counties required to have an I/M program as 

described in 40 CFR 51.350(a), due to being designated nonattainment for CO or Moderate 

O3. Although only part of Granville County was designated Moderate nonattainment for the 

1-hour O3 standard, the whole County was subject to the I/M program. Similarly with Iredell 

County, where only a portion of the County was designated as Moderate for the 8-hour O3

standard, the whole County is subject to the I/M program. 

Table 1. Counties Required to Have I/M Program

County Nonattainment 

Pollutant Status Program 1990 Census Population 

Cabarrus 8-hour O3 Moderate-Nonattainment Basic OBD 98,935 

Davidson 1-hour O3 Maintenance Basic OBD 126,677 

Durham 

CO 

1-hour O3 Maintenance Basic OBD 181,835 

8-hour O3

Forsyth 

CO 

Maintenance Basic OBD 265,878 1-hour O3

Gaston 

1-hour O3 Maintenance 

Basic OBD 175,093 8-hour O3 Moderate-Nonattainment 

Granville 

1-hour O3 Maintenance 

Basic OBD 38,345 8-hour O3 Maintenance 

Guilford 1-hour O3 Maintenance Basic OBD 347,420 

Iredell 8-hour O3 Moderate-Nonattainment Basic OBD 92,931 

Lincoln 8-hour O3 Moderate-Nonattainment Basic OBD 50,319 

Mecklenburg 

CO 

Maintenance 

1-hour O3 Basic OBD 511,433 

8-hour O3 Moderate-Nonattainment 

Rowan 8-hour O3 Moderate-Nonattainment Basic OBD 110,605 

Union 8-hour O3 Moderate-Nonattainment Basic OBD 84,211 

Wake 

CO 

1-hour O3 Maintenance Basic OBD 423,380 

8-hour O3

2. In 1999, the North Carolina General Assembly passed legislation to require an OBD I/M 

program in not only the counties required to have an I/M program under 40 CFR 51.350(a),

but also in other counties in the State that may need the additional emission reductions to 

achieve the 1997 8-hour ozone standard. The North Carolina General Statue (NCGS) §143-

215.107A(c) specifies the counties that are required to have OBD I/M. The State regulations 

NCAC Title 15A, Subchapter 2D, Section .1000, “Motor Vehicle Emission Control Standard”

North Carolina I/M SIP May 21, 2010 2 
references the General Statue. Table 2 below lists the additional counties that are required to 

have an I/M program per NCGS §143-215.107A.

Table 2. Additional Counties Required by 1999 Clean Air Bill to Have OBD I/M Program

County Nonattainment 

Pollutant Status Program 1990 Census Population 

Alamance - - Basic OBD 108,213 

Brunswick - - Basic OBD 50,985 

Buncombe - - Basic OBD 174,821 

Burke - - Basic OBD 75,744 

Caldwell - - Basic OBD 70,709 

Carteret - - Basic OBD 52,556 

Catawba PM2.5 Subpart 1 Basic OBD 118,412 

Chatham 8-hour O3 Maintenance Basic OBD 38,759 

Cleveland - - Basic OBD 84,714 

Craven - - Basic OBD 81,613 

Cumberland - - Basic OBD 274,566 

Edgecombe 8-hour O3 Maintenance Basic OBD 56,558 

Franklin 8-hour O3 Maintenance Basic OBD 36,414 

Harnett - - Basic OBD 67,822 

Haywood 8-hour O3 Maintenance Basic OBD 46,942 

Johnston 8-hour O3 Maintenance Basic OBD 81,306 

Lee - - Basic OBD 41,734 

Lenoir - - Basic OBD 52,274 

Moore - - Basic OBD 59,013 

Nash 8-hour O3 Maintenance Basic OBD 76,677 

New Hanover - - Basic OBD 120,284 

Onslow - - Basic OBD 149,838 

Orange 8-hour O3 Maintenance Basic OBD 93,851 

Person 8-hour O3 Maintenance Basic OBD 30,180 

Pitt - - Basic OBD 107,924 

Randolph - - Basic OBD 106,546 

Robeson - - Basic OBD 105,179 

Rockingham - - Basic OBD 86,064 

Rutherford - - Basic OBD 56,918 

Stanly - - Basic OBD 51,765 

Stokes - - Basic OBD 37,223 

Surry - - Basic OBD 61,704 

Wayne - - Basic OBD 104,666 

Wilkes - - Basic OBD 59,393 

Wilson - - Basic OBD 66,061 

North Carolina I/M SIP May 21, 2010 3 
3. The Environmental Management Commission (EMC) has the authority to adopt “a program 

for testing emissions from motor vehicles and to adopt motor vehicle emission standards”, 

NCGS §143-215.107. (a)(6), “Air Quality Standards and Classifications.”

The EMC has adopted a basic I/M program, NCAC, Title 15A, Subchapter 2D, Section .1000, 

“Motor Vehicle Emissions Control Standard.”

The I/M program is implemented by the Commissioner of the DMV through the use of 

licensed safety/emission inspection stations, NCGS Article 3 – Motor Vehicle Act of 1937 

§20-128.2 (a), “Motor vehicle emission standards.”

4. 40 CFR 51.372(a) (3) requires ZIP codes be included in the State Implementation Plan (SIP) 

if program is not county-wide. The North Carolina program is county wide, so no list of 

program area ZIP codes is required. 

B. ENHANCED I/M PERFORMANCE STANDARD (40 CFR §51.351) 

Not applicable to North Carolina. 

C. BASIC I/M PERFORMANCE STANDARD (40 CFR §51.352) 

1. Basic I/M Performance Standards for 1-hour O3 and CO standards

In 1993, North Carolina submitted an I/M SIP to address the I/M requirements for the 1-hour 

O3 and CO standards. The original performance standards for Volatile Organic Compounds 

(VOC) and CO are summarized below. These performance standards were calculated using 

the latest EPA mobile model at that time, MOBILE5a. Appendix 1 contains the MOBILE5a 

input and output files from the runs used to evaluate the emission reduction benefits. 

VOC Emission Factors (grams/mile) 

1997 2000 2003 

Performance Standard 2.32 2.09 1.94 

Program Target 2.30 2.08 1.92 

CO Emission Factors (grams/mile) 

1996 2000 

Performance Standard 26.74 24.46 

Program Target 26.53 24.34 

 

2. Basic I/M Performance Standards for the 1997 8-hour O3 standard

In June 2004, the EPA designated areas as nonattainment for the 1997 8-hour O3 standard. 

One area in North Carolina was designated as Moderate nonattainment, the CharlotteGastonia-Rock Hill, NC-SC area (referred to as the Metrolina area). The North Carolina 

portion of the Metrolina area includes Cabarrus, Gaston, Lincoln, Mecklenburg, Rowan, 

Union Counties and Coddle Creek and Davidson Townships in Iredell County. With this 

North Carolina I/M SIP May 21, 2010 4 
designation, additional counties were required under 40 CFR 51.350(a) to implement an I/M 

program. 

Since Mecklenburg and Gaston Counties had been designated Moderate nonattainment for 

the 1-hour O3 standard, the performance standards for these two counties are established in 

40 CFR 51.352(c). The results of the performance standards are summarized below. 

Appendix 1 contains the input and output files for MOBILE6.2 runs performed to evaluate the 

emission benefits of the basic I/M areas in these two counties. 

Emission Factors for Mecklenburg and Gaston Counties (grams/mile) 

VOC NOx 

Performance Standard 0.784 0.750 

Program Target 0.726 0.688 

The remaining counties in the Metrolina nonattainment area are required to meet the 

performance standards established in 40 CFR 51.352(e). The results of the performance 

standards are summarized below. Appendix 1 contains the input and output files for 

MOBILE6.2 runs performed to evaluate the emission benefits of the basic I/M areas in these 

counties. 

Emission Factors for Remaining Counties (grams/mile) 

VOC NOx 

Performance Standard 1.363 1.027 

Program Target 1.280 0.936 

3. The I/M program meets the emission reduction targets in the attainment year and each 

milestone year prior to the attainment year, as applicable. The State of North Carolina 

commits to meeting the performance standard. 

4. The MOBILE input and output files for runs used in determining compliance with the 

performance standards are included in Appendix 1. Appendix 2 contains the modeling 

assumptions, which includes a description of the local inputs used in the modeling, a 

description of the source from which those inputs were derived, and a description of how they 

were derived. 

D. NETWORK TYPE AND PROGRAM EVALUATION (40 CFR §51.353) 

1. North Carolina’s basic I/M program is comprised of a decentralized network of test-andrepair facilities. No counties are currently required to be part of an Enhanced I/M program. 

The program consists of approximately 4,464 stations. 

The DAQ has regional staff that conduct a random vehicle survey in each I/M county 

annually, to determine the compliance of the sampled vehicles and the DMV’s execution of 

registration denial on those out of compliance. The State continues to determine program 

effectiveness although basic I/M programs are not required to include an ongoing evaluation 

North Carolina I/M SIP May 21, 2010 5 
to quantify the emission reduction benefits of the program or to determine if the program is 

meeting the requirements of the Clean Air Act. 

E. ADEQUATE TOOLS AND RESOURCES (40 CFR §51.354) 

1. The I/M program is funded by receipts collected from the sale of electronic I/M inspection 

authorizations. A portion of these monies are accredited to the DAQ and DMV, as directed 

in NCGS Article 3A – Safety and Emissions Inspection Program §20-183.7(c), “Fees for 

performing an inspection and issuing an electronic inspection authorization to a vehicle; use 

of civil penalties.” 

Inspection fee 

 Station Fee $23.75 

 Authorization Fee $6.25

 $30.00 

The authorization fee is distributed as follows: 

 Highway Fund $0.55 

Inspection Program Account 3.00 

Telecommunications Account 1.75 

Volunteer Rescue/EMS Fund 0.18 

Rescue Squad Workers' Relief Fund 0.12 

Division of Air Quality 0.65

 $6.25 

The DAQ portion of the fee is credited to the DAQ I/M Air Pollution Control Account. This 

is a nonreverting fund established for developing and implementing air pollution control 

programs for mobile sources, NCGS §143-215.3A (b1), “Water and Air Quality Account; use 

of application and permit fees; Title V Account; I & M Air Pollution Control Account; 

reports.”

The DMV I/M budget is a nonreverting account within the North Carolina Department of 

Transportation’s (NCDOT) Inspection Program Account. Revenue in the Inspection 

Program Account may be used only to fund the vehicle I/M program. 

2. Appendix 3 includes DAQ and DMV budgets for Fiscal Years 2010-2011 (Note: State fiscal 

year runs from July 1 through June 30). 

The DAQ I/M Air Pollution Control Account funds 10 I/M positions within DAQ. The 

DAQ employs two full time engineers, one specialist, and one supervisor that perform the 

day to day program duties which include but are not limited to data analysis, EPA annual 

reporting, consumer outreach, and software/analyzer certification and specification 

development. DAQ also has six regional auditors that perform annual audits of DMV staff’s 

enforcement activities on an annual basis. Additionally, the DAQ I/M staff supports the 

periodic analyzer recertification testing and other such activities. 

The License & Theft Bureau of the DMV is tasked with oversight and enforcement of the I/M 

program for North Carolina. The DMV has 147 “sworn” law enforcement agents that issue 

vehicle waivers and perform some covert audits. They are also the enforcement arm of the 

North Carolina I/M SIP May 21, 2010 6 
agency and are responsible for investigating all clean scan cases and handling all criminal 

charges. The DMV’s 61 civilian auditors are tasked with performing overt and covert audits 

on approximately 4,464 emission stations in North Carolina. The civilian auditors and law 

enforcement agents also perform remote audits on the inspection stations. Waivers and 

exemptions are issued by the auditors and law enforcement agents within the eight districts 

throughout North Carolina. Additionally, the DMV employs a six member civilian staff Call 

Center for consumers to report complaints and inquiries on emission inspection requirements 

and information. The DMV employs personnel to handle the registration denial system.   

F. TEST FREQUENCY AND CONVENIENCE (40 CFR §51.355) 

1. The current test frequency of North Carolina’s basic I/M inspection is annual. In addition, 

North Carolina has a 1-year new vehicle exemption, as described in NCAC Title 15A, Section 

2D.1005, “On-Board Diagnostic Standards” and NCGS § 20-183.2. “Description of vehicles 

subject to safety or emissions inspection; definitions.” In addition, an emissions component 

tamper and safety inspection is performed statewide on all vehicles no more than 35 years 

old, measured from the date of manufacture, NCGS Article 3A – Safety and Emissions 

Inspection Programs §20-183.3 (a), “Scope of safety inspection and emissions inspection.” 

2. Subject vehicles are required to have an annual OBD inspection no more than 90 days prior 

to the vehicle registration expiration date, NCGS Article 3 – § 20-183.4C, “When a vehicle 

must be inspected; three-day trip permit.” 

All North Carolina law-enforcement officers have the power to enforce the provisions of 

NCGS Article 3 – Motor Vehicle Act of 1937 §20-183, “Duties and powers of lawenforcement officers; warning by local officers before stopping another vehicle on highway; 

warning tickets.” 

3. The DMV “Safety and Emissions Regulation Manual” requires stations to operate at least 

eight hours per day five days per week, except holidays. Stations are required to have at least 

one inspector mechanic on duty a minimum of eight hours during normal working hours. 

Stations may operate other than 8:00 AM to 5:00 PM Monday through Friday schedule. At 

least one inspector mechanic at a station must be licensed. The DMV is responsible for 

licensing of the inspector mechanics as outlined in Section R. 

G. VEHICLE COVERAGE (40 CFR §51.356) 

1. An I/M inspection is required for all 1996 and newer model year gasoline-powered vehicles 

(light-duty) registered in I/M subject areas, NCAC Title 15A, Subchapter 2D, Section .1005, 

“On-Board Diagnostic Standards” and NCGS §143-215.107A, “Motor vehicle emissions 

testing and maintenance program.” A table showing the number of vehicles by county and 

model year for 2009 is contained in Appendix 4. These figures reflect the number of 

registered vehicles believed to be operated in the I/M area. 

2. The following highway vehicles are exempt from the I/M requirement: the current model 

year, all 1995 and older model vehicles, diesel vehicles, heavy-duty vehicles, alternative 

fueled vehicles, and motorcycles. These vehicles are subject to the annual safety inspection, 

which includes an emissions control device tampering inspection. Vehicles registered as “Kit 

cars” are exempt from the OBD portion of the inspection. 

North Carolina I/M SIP May 21, 2010 7 
3. The DMV may collect fleet information directly from the owners or from the vehicle 

registration records concerning the number of vehicles operated in an I/M county but 

registered in a non-I/M county and vice versa. Enforcement will continue to be registration 

denial. 

4. Fleet vehicles are subject to the program if registered in or primarily operated in a designated 

I/M county. Fleet owners are allowed to self-inspect their vehicles, NCGS Article 3A Safety 

and Emissions Inspection Program §20.183-4A, “License required to perform safety 

inspection; qualifications for license.” 

Federal fleet vehicles are required to meet the same requirements as other fleets. EPA’s I/M 

rules require that federal employees working at a federal facility within an I/M county must 

comply with the I/M program even if they live outside the I/M county. There are federal 

facilities located in I/M subject areas in North Carolina. 

H. TEST PROCEDURES AND STANDARDS (40 CFR §51.357) 

1. The EMC has the authority to establish test procedures and standards under NCGS §143-

215.107 (6), “Air quality standards and classifications.”

The EMC has adopted test standards under NCAC, Title 15A, Subchapter 2D, Section .1000, 

“Motor Vehicle Emission Control Standard.” 

The EMC has also adopted test procedures developed by the DAQ and outlined in, “North 

Carolina Analyzer System Specification”, using EPA’s OBD Test procedures on an OBD 

type analyzer. The OBD test procedures and standards were implemented July 1, 2002. 

2. Vehicles must pass the safety inspection, tampering inspection, and OBD test to receive a 

safety/emissions authorization. All vehicles failing any part of an initial test must pass a 

retest. If the initial failure was an emissions related item (check engine light commanded on, 

emissions control device tampering or exhaust system), the OBD test must be repeated and 

passed. If the vehicle owner takes the vehicle to a station other than the original location of 

the initial test failure, the vehicle must be tested for and pass all the test components. 

3. Inspection rejection standards are clearly established in both the DAQ “North Carolina 

Analyzer System Specification,” and the DMV “Safety and Emissions Regulation Manual.”

I. TEST EQUIPMENT (40 CFR §51.358) 

1. Test equipment specifications are contained in the DAQ “North Carolina Analyzer System 

Specification.” The DMV regulations manual contain equipment required to carry out 

inspections, “DMV License and Theft Policy and Procedures Manual.”

2. All test equipment is fully computerized and all processes are automated to the highest degree 

possible. The DMV law enforcement agents have the authority to clear lock-outs. 

Manufacturer’s service representatives are able to clear specific lockouts. The date and cause 

North Carolina I/M SIP May 21, 2010 8 
of any occurrence of a lockout as well as the date and the authority personnel who cleared the 

lockout are recorded in a data record. 

Data entry functions associated with the test are streamlined through the use of look-up 

tables. To reduce data entry errors, vehicle identification information requires redundant 

entry if manually entered. However, under normal circumstances, vehicle information entry 

is by bar code scanners. Emissions test results are recorded automatically by the analyzer. 

3. The test process is completely controlled by the analyzer. The process begins with data entry 

of the vehicle registration, license plate and vehicle identification number (VIN) information. 

Verification of vehicle identification data is confirmed through re-entry of this information 

during the inspection. The test procedure sequence and pass/fail determinations are made 

automatically by the analyzer. Data is recorded to both a removable device (floppy/USB 

storage key) and a hard drive. Test data is sent via modem to the State during each 

inspection, and stored on the analyzer hard drive for a minimum of 60 days. Once 

transmitted to the State, it is maintained by the Vehicle Information Database (VID) 

contractor as a permanent data set. Prior to being loaded to the program database all 

information is edit checked for errors. 

J. QUALITY CONTROL (40 CFR §51.359) 

1. Quality control procedures and record keeping requirements have been established in the 

“DMV License and Theft Policy and Procedures Manual.” These measures will ensure the 

State of North Carolina meets its commitment to provide motorists with consistent and 

accurate test results. The inspection site personnel must continue to ensure that all equipment 

is properly maintained and has updated vendor software. 

2. The DAQ “North Carolina Analyzer System Specification” includes the minimum durability 

and functional requirements to ensure accurate processing and recording of test results. All 

enhancements and/or changes to this document are reviewed and approved prior to its release. 

K. WAIVERS AND COMPLIANCE VIA DIAGNOSTIC INSPECTION 

(40 CFR §51.360) 

1. A waiver rate of 5% (percentage of initially failed vehicles receiving waivers) is assumed in 

the demonstration that the I/M program meets the basic performance standard. The State of 

North Carolina commits to a waiver rate in practice that is equal to or lower than 5%. If the 

waiver rate reported in the annual report to EPA is higher, the State will take corrective action 

to lower the waiver rate. Corrective strategies may include: not issuing waivers on vehicles 

under 6 years of age, raising minimum expenditure limits, and limiting waivers on vehicles to 

only once every four years. If the waiver rate cannot be lowered to levels committed to in the 

SIP, or if the State chooses not to implement measures to do so, the State will revise the I/M 

emission reduction projections in the SIP and will implement other program changes needed 

to ensure the performance standard is met. 

2. The State of North Carolina commits to issuing waivers only when the requirements of the 

40 CFR §51.360 are met. §51.360 requires a minimum of $200 for 1981 and newer vehicles 

be spent in order to qualify for a waiver. Repairs must be performed by a recognized repair 

North Carolina I/M SIP May 21, 2010 9 
technician to apply toward the waiver limit. Waivers are issued by DMV as outlined in the 

“DMV License and Theft Policy and Procedures Manual” and authorized by NCGS § 

20-183.5A. “When a vehicle that fails a safety inspection because of missing emissions 

control devices may obtain a waiver.” 

3. EPA regulations allow a time extension to obtain needed repairs on a vehicle in the case of 

economic hardship when waiver requirements have not been met. The DMV, at this time, 

has not chosen to offer time extensions. 

EPA regulations also allow exemptions for tampering-related repairs if it can be verified that 

the part in question or one similar to it is no longer available for sale. The DMV has chosen 

to offer tamper-related exemptions; DMV will verify that the part in question or one similar 

to it is no longer available for sale prior to issuing the exception. 

4. The emissions receipt (certificate) for a failed vehicle inspection alerts the motorist of 

emission failure information, warranty coverage, and waiver availability in the DAQ’s 

“North Carolina Analyzer System Specification.” 

L. MOTORIST COMPLIANCE ENFORCEMENT (40 CFR §51.361) 

1. The legal authority for the implementation of the I/M program is included in § 143-215.107. 

“Air quality standards and classifications.” The regulations governing specific operation of 

this aspect of the program are contained in the regulations in 15A NCAC 02D .1005, “OnBoard Diagnostic Standards.” 

2. The legal authority for enforcement of the I/M program is included in, NCGS § 20-183.8. 

“Infractions and criminal offenses for violations of inspection requirements.” A penalty 

schedule for violations of these regulations is included in NCGS Article 3A – Safety and 

Emissions Inspection Program § 20-183.8A, “Civil penalties against motorists for emissions 

violations; waiver.” 

3. A registration-denial based program is used for enforcement. As of April 12, 2010, vehicles 

will be denied registration renewal if a required emissions inspection is not found in the VID 

for that vehicle. Vehicle owners are allowed 90 days prior to the registration expiration date 

to get an inspection for their vehicle. 

The DMV developed the “DMV License and Theft Policy and Procedures Manual” to be 

followed by personnel involved in enforcing and overseeing the program. This manual 

details the procedures followed by the DMV and other State personnel involved in I/M 

program document handling and processing and by the supervisory personnel who oversee 

staff involved in program enforcement, document handling and processing. The procedures 

manual also provides a schedule of disciplinary actions used against personnel who deviate 

from prescribed procedures. 

4. All non-gasoline powered vehicles, motorcycles, heavy-duty, and current model year vehicles 

are exempt from the I/M program. 

5. There are no provisions for off-hours testing for fleet vehicles since fleets may be selfinspected. Fleets may be officially inspected outside of the normal I/M program test 

North Carolina I/M SIP May 21, 2010 10 
facilities, but are subject to the same test requirements using the same quality control 

standards as non-fleet vehicles. 

6. The State of North Carolina commits to the level of motorist enforcement necessary to ensure 

a compliance rate of no less than 92% among subject vehicles by 2011. This compliance rate 

reflects the compliance rate used in the demonstration of the performance standard as 

described in Section A of this document. If it is determined that the I/M program is not 

meeting the compliance rate committed to here, the DAQ will review the compliance 

methodology and revise when necessary. The DAQ believes that the compliance rate of 92% 

is a conservative estimate. However, when the new electronic authorization program is fully 

implemented, the DAQ and DMV anticipate compliance rates to considerably improve. 

M. MOTORIST COMPLIANCE ENFORCEMENT PROGRAM 

OVERSIGHT (40 CFR §51.362) 

1. The “DMV License and Theft Policy and Procedures Manual” details the procedures 

followed by the DMV in enforcing the motorist compliance portion of the I/M program, 

handling and processing program documents, and by the supervisory personnel who oversee 

staff involved in program enforcement, document handling, and processing. The State 

Personnel Manual describes disciplinary actions to be used against personnel who deviate 

from prescribed procedures. 

N. QUALITY ASSURANCE (40 CFR §51.363) 

1. The DMV uses a process to automate their reporting system that gathers information of the 

DMV’s activities that takes place across the state. In mid-2006, the DMV began the 

installation of their new enforcement application package that tracks all enforcement 

activities and field auditing activities in an electronic format for better efficiency. Verizon 

Business, the VID contractor developed a new real time data collection system called the 

North Carolina Electronic Transmission System (NCETS). NCETS helps to improve the 

DMV’s remote auditing of stations, by allowing the DMV field staff to remotely observe an 

inspection taking place from their computer. NCETS also allows authorized station 

personnel to purchase electronic authorizations for their analyzers. 

2. The DMV schedules a minimum of four overt audits per station per year, and one covert 

audit per station per year and as many remote observations as required to validate complaints 

or concerns of wrong doing. The DMV and DAQ requested approval from EPA to reduce 

the number of covert audits from two to one per year, while the DMV implements a new 

targeted enforcement program. Details of this new effort is outlined in the DAQ’s 

“Inspection and Maintenance (I/M) Program Audit Procedure Manual” and the “DMV 

License and Theft Policy and Procedures Manual.” 

 

3. All DMV program auditors shall themselves be audited once per year by the DAQ. The 

DAQ “Inspection and Maintenance (I/M) Program Audit Procedure Manual” documents the 

North Carolina I/M SIP May 21, 2010 11 
procedures the DAQ follows while auditing the I/M program and the DMV quality assurance 

auditors. 

O. ENFORCMENT AGAINST CONTRACTORS, STATIONS AND 

INSPECTORS (40 CFR §51.364) 

1. The DMV is responsible for enforcement against inspection stations and inspector mechanics. 

The enforcement actions that the DMV must follow for violations found at inspection stations 

or by inspectors are outlined in the following statutes: 

• NCGS § 20-183.8, “Infractions and criminal offenses for violations of 

inspection requirements” 

• NCGS § 20-183.8A, “Civil penalties against motorists for emissions violations; 

waiver” 

• NCGS §20-183.8B, “Civil penalties against license holders and suspension or 

revocation of license for emissions violations” 

• NCGS § 20-183.8C “Acts that are Type I, II, or III emissions violations” 

• NCGS § 20-183.8D, “Suspension or revocation of license.” 

• NCGS § 20-183.8F, “Requirements for giving license holders notice of 

violations and for taking summary action.” 

The NCGS allow for the immediate suspension or revocation of a license when a violation is 

found at an inspection station or by an inspector. 

2. The administrative and judicial procedures and responsibilities relevant to the enforcement 

process are outlined in, NCGS § 20-183.8G, “Administrative and judicial review.”

P. DATA COLLECTION (40 CFR §51.365) 

1. The DAQ’s “North Carolina Analyzer System Specification” contains the equipment 

specifications that must be met by all I/M testing equipment approved for use in the State of 

North Carolina. This manual also provides data collection requirements and record storage 

formatting for the analyzers. The information contained within each vehicle test record is 

such that it is possible to tie specific test results to a specific vehicle, test site, analyzer, and 

inspector.

2. The State of North Carolina hereby commits to gather, summarize and report the results of 

quality control checks performed on testing equipment, sorted according to station number, 

analyzer number, date, and the start time of the quality control check. 

Q. DATA ANALYSIS AND REPORTING (40 CFR §51.366) 

1. Annually, the State of North Carolina will generate a report summary based upon program 

data collected from January through December of the previous year. This report will provide 

statistics for the testing program, the quality control program, the quality assurance program, 

and the enforcement program. At a minimum, the State commits to address all of the data 

elements listed in 40 CFR §51.366. 

North Carolina I/M SIP May 21, 2010 12 
2. The State of North Carolina shall report biennially on all changes made in the program 

design, funding, personnel levels, procedures, regulations, and legal authority, and shall 

supply a detailed discussion of the impact of such changes upon the program. This report 

will also detail and discuss any weaknesses or problems discovered in the program over the 

previous two-year period, as well as the steps that were taken to address those problems, the 

result of those corrective actions, and any future efforts planned. 

R. INSPECTOR TRAINING AND LICENSING OR CERTIFICATION 

(40 CFR §51.367) 

1. Inspectors are required to successfully complete an eight-hour course approved by the DMV 

that teaches students about the causes and effects of the air pollution problem, the purpose of 

the emissions inspection program, the vehicle emission standards established by the EPA, the 

emission control devices on vehicles, how to conduct an emissions inspection using 

equipment to analyze data provided by the OBD equipment approved by the EMC, and any 

other topic required by 40 C.F.R. § 51.367 to be included in the course. This course is 

offered at local community colleges across the state. Successful course completion requires a 

passing score on a written test and on a hands-on test in which the student is required to 

conduct an emissions inspection of a motor vehicle. 

2. By law, NCGS § 20-183.4, “License required to perform emissions inspection; qualifications 

for license”, both stations and inspectors are required to apply for a license with the DMV. 

Stations are also required to have equipment to analyze data provided by the OBD equipment 

approved by the EMC. 

S. PUBLIC INFORMATION AND COSUMER PROTECTION 

(40 CFR §51.368) 

1. The DAQ and DMV have a Memorandum of Understanding to jointly address public 

outreach for the OBD I/M program throughout the life of the program. Both agencies have 

developed public service announcements that inform the public about the I/M program. 

When the OBD program first started in North Carolina, many of the public service 

announcements focused on informing the public about the new program and when it would 

become effective in the various areas across the State. Additionally, Car Care Clinics were 

held across the State, which provided face-to-face time with the public and the inspection 

facilities to discuss the importance of the I/M program. Open-Net Forums were broadcasted 

on public television four or five times a year, in both English and Spanish, which provided 

the public the opportunity to call into the show and have their questions answered about the 

I/M program. Finally, the DAQ has established a separate web page 

(http://daq.state.nc.us/motor/inspect/htdocs/en/) providing information on the I/M program. 

Now that the program has been fully implemented, the public service announcements have 

focused on the importance of vehicle maintenance. 

In addition to the OBD specific outreach, the DAQ has an Air Awareness program that 

provides general public education and outreach across the State about air quality issues. This 

program has two state-wide coordinators and helps fund local coordinators in several areas 

North Carolina I/M SIP May 21, 2010 13 
North Carolina I/M SIP May 21, 2010 14 

across the State to educate the public about how their actions impact the air quality and types 

of things the public may do to minimize their emissions. Since highway mobile sources are 

the largest source of emissions contributed to the general public, part of the Air Awareness 

program focuses on educating the public about the OBD I/M program, what the check engine 

light means, and why it is important to keep their vehicles maintained. 

Additionally, the DAQ voluntarily provides Air Quality Forecasts across the State. 

Currently, the DAQ forecasts for ozone and fine particulate matter in the following areas: 

Asheville (both valley and ridge tops), Hickory, Charlotte/Gastonia, Greensboro/WinstonSalem/High Point, Raleigh/Durham/Chapel Hill, Fayetteville and Rocky Mount (no PM 

forecast due to no continuous monitor in the area). The forecasts are available through the 

DAQ website, a toll-free hotline, the EPA Air Now website, the newspapers and the 

broadcast media. In addition to the Air Quality Forecasts, real-time ambient air quality data 

can be viewed on the DAQ website or the public may call a hotline that provides the current 

Air Quality Index for nine areas in the State. 

2. The DMV has made provisions for individuals wishing to challenge their results from an I/M 

station. When a vehicle fails an emissions test, the test report automatically includes 

information concerning causes for emissions failure, vehicle warranty, and waiver availability 

as outlined in the DAQ’s “North Carolina Analyzer System Specification.”

T. IMPROVING REPAIR EFFECTIV ENESS (40 CFR §51.369) 

1. North Carolina’s basic I/M program is not required to track repair effectiveness of individual 

repair facilities, however the DAQ has developed a course curriculum (basic and advanced) 

for the diagnosis and repair of motor vehicles that have OBD systems and has provided 

training sessions for community college instructors to offer this specialized training. 

U. COMPLIANCE WITH RECALL NOTICES (40 CFR §51.370) 

1. Although not required for basic I/M program, the North Carolina emissions analyzers will 

display emissions related Technical Service Bulletins (TSB) or recall information, if available 

from the VID, during the emission inspection process. 

V. ON ROAD TESTING (40 CFR §51.371) 

1. On-road testing is not required of North Carolina’s basic I/M program. 
APPENDIX 1 

MOBILE Input and Output Files 
(This page intentionally left blank)
North Carolina I/M SIP May 21, 2010 Appendix 1 - 1
North Carolina I/M SIP May 21, 2010 Appendix 1 - 2
North Carolina I/M SIP May 21, 2010 Appendix 1 - 3
North Carolina I/M SIP May 21, 2010 Appendix 1 - 4
North Carolina I/M SIP May 21, 2010 Appendix 1 - 5
North Carolina I/M SIP May 21, 2010 Appendix 1 - 6
North Carolina I/M SIP May 21, 2010 Appendix 1 - 7
North Carolina I/M SIP May 21, 2010 Appendix 1 - 8
North Carolina I/M SIP May 21, 2010 Appendix 1 - 9
North Carolina I/M SIP May 21, 2010 Appendix 1 - 10
MOBILE6.2 Input & Output Files 

MOBILE6 INPUT FILE : 

> Mecklenburg & Gaston Co. I/M Baseline Analysis for 2010 

> with DAQ generated vehicle mix 

POLLUTANTS : NOX HC 

SPREADSHEET : Mecklenburg & Gaston CO., NOX VOC 

RUN DATA : 

***************** RUN SECTION ********** 

FUEL RVP : 7.8 

REG DIST : mekage08.prn 

HOURLY TEMPERATURES: 71.0 73.8 77.0 80.3 82.5 85.4 87.3 88.5 89.1 88.5 89.6 89.2 

 86.3 82.6 77.8 77.5 76.2 75.9 75.0 74.0 73.2 82.3 71.6 71.0 

> IDLE 

I/M PROGRAM : 1 2002 2050 1 T/O IDLE 

I/M MODEL YEARS : 1 1968 1995 

I/M VEHICLES : 1 21111 11111111 1 

I/M STRINGENCY : 1 20.0 

I/M COMPLIANCE : 1 100.0 

I/M WAIVER RATES : 1 0.0 0.0 

> OBDII 

I/M PROGRAM : 2 2002 2050 1 T/O OBD I/M 

I/M MODEL YEARS : 2 1996 2050 

I/M VEHICLES : 2 21111 11111111 1 

I/M STRINGENCY : 2 20.0 

I/M COMPLIANCE : 2 100.0 

I/M WAIVER RATES : 2 0.0 0.0 

I/M PROGRAM : 3 2002 2050 1 T/O EVAP OBD 

I/M MODEL YEARS : 3 1996 2050 

I/M VEHICLES : 3 21111 11111111 1 

I/M STRINGENCY : 3 20.0 

I/M COMPLIANCE : 3 100.0 

I/M WAIVER RATES : 3 0.0 0.0 

ANTI-TAMP PROG : 

91 76 50 22222 22222222 2 11 095. 22212222 

************ SCENARIO SECTION ******** 

SCENARIO RECORD : Urban local 

CALENDAR YEAR : 2010 

EVALUATION MONTH : 7 

> Urban local mix and speeds 

VMT FRACTIONS : 

0.3751 0.0939 0.3127 0.0963 0.0443 0.0388 0.0037 0.0031 

0.0024 0.0086 0.0021 0.0023 0.0082 0.0019 0.0010 0.0056 

AVERAGE SPEED : 24 Arterial 0.0 100.0 0.0 0.0 

RELATIVE HUMIDITY : 91. 86. 78. 71. 65. 59. 53. 50. 48. 51. 47. 47. 

 53. 61. 70. 71. 76. 77. 79. 83. 85. 87. 88. 91. 

BAROMETRIC PRES : 30 

END OF RUN : 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 11
*************************************************************************** 

* MOBILE6.2.03 (24-Sep-2003) * 

* Input file: PGNV10B.IN (file 1, run 1). * 

*************************************************************************** 

* Reading Registration Distributions from the following external 

* data file: MEKAGE08.PRN 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.996 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.998 MYR sum not = 1. (will normalize) 

* IDLE 

* OBDII 

 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local 

* File 1, Run 1, Scenario 1. 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local mix and speeds 

 M615 Comment: 

 User supplied VMT mix. 

 M583 Warning: 

 The user supplied arterial average speed of 24.0 

 will be used for all hours of the day. 100% of VMT 

 has been assigned to the arterial/collector roadway 

 type for all hours of the day and all vehicle types. 

*** I/M credits for Tech1&2 vehicles were read from the following external 

 data file: TECH12.D 

 M 48 Warning: 

 there are no sales for vehicle class HDGV8b 

 Calendar Year: 2010 

 Month: July 

 Altitude: Low 

 Minimum Temperature: 71.0 (F) 

 Maximum Temperature: 89.6 (F) 

 Minimum Rel. Hum.: 47.0 (%) 

 Maximum Rel. Hum.: 91.0 (%) 

 Barometric Pressure: 30.00 (inches Hg) 

 Nominal Fuel RVP: 7.8 psi 

 Weathered RVP: 7.5 psi 

 Fuel Sulfur Content: 30. ppm 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 12
 Exhaust I/M Program: Yes 

 Evap I/M Program: Yes 

 ATP Program: Yes 

 Reformulated Gas: No 

 Vehicle Type: LDGV LDGT12 LDGT34 LDGT HDGV LDDV LDDT HDDV MC All Veh 

 GVWR: <6000 >6000 (All) 

 ----- ------ ------ ------ ----- ----- ----- ----- ----- ------ 

VMT Distribution: 0.3748 0.4066 0.1385 0.0344 0.0003 0.0021 0.0377 0.0056 1.0000 

 ------------------------------------------------------------------------------------------------ 

Composite Emission Factors (g/mi): 

Composite VOC : 0.547 1.081 0.618 0.963 0.692 0.185 0.304 0.326 3.02 0.784 

Composite NOX : 0.380 0.796 0.634 0.755 1.527 0.315 0.407 3.645 0.96 0.750 

 ------------------------------------------------------------------------------------------------ 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 13
MOBILE6 INPUT FILE : 

> Mecklenburg & Gaston Co. I/M SIP analysis NC run for 2010 

> with default starts and 92% compliance instead of 95% 

POLLUTANTS : NOX HC 

SPREADSHEET : Mecklenburg & Gaston CO., NOX VOC 

RUN DATA : 

***************** RUN SECTION ********** 

FUEL RVP : 7.8 

REG DIST : mekage08.prn 

HOURLY TEMPERATURES: 71.0 73.8 77.0 80.3 82.5 85.4 87.3 88.5 89.1 88.5 89.6 89.2 

 86.3 82.6 77.8 77.5 76.2 75.9 75.0 74.0 73.2 82.3 71.6 71.0 

> OBDII 

I/M PROGRAM : 1 2003 2050 1 TRC OBD I/M 

I/M MODEL YEARS : 1 1996 2050 

I/M VEHICLES : 1 22222 11111111 1 

I/M STRINGENCY : 1 10.0 

I/M COMPLIANCE : 1 92.0 

I/M WAIVER RATES : 1 5.0 5.0 

I/M PROGRAM : 2 2003 2050 1 TRC EVAP OBD 

I/M MODEL YEARS : 2 1996 2050 

I/M VEHICLES : 2 22222 11111111 1 

I/M STRINGENCY : 2 10.0 

I/M COMPLIANCE : 2 92.0 

I/M WAIVER RATES : 2 5.0 5.0 

ANTI-TAMP PROG : 

91 76 50 22222 22222222 2 11 095. 22212222 

************ SCENARIO SECTION ******** 

SCENARIO RECORD : Urban local-Gaston County 

CALENDAR YEAR : 2010 

EVALUATION MONTH : 7 

> Urban local mix and speeds 

VMT FRACTIONS : 

0.3751 0.0939 0.3127 0.0963 0.0443 0.0388 0.0037 0.0031 

0.0024 0.0086 0.0021 0.0023 0.0082 0.0019 0.0010 0.0056 

AVERAGE SPEED : 24 Arterial 0.0 100.0 0.0 0.0 

RELATIVE HUMIDITY : 91. 86. 78. 71. 65. 59. 53. 50. 48. 51. 47. 47. 

 53. 61. 70. 71. 76. 77. 79. 83. 85. 87. 88. 91. 

BAROMETRIC PRES : 30 

END OF RUN : 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 14
*************************************************************************** 

* MOBILE6.2.03 (24-Sep-2003) * 

* Input file: PGNV10C.IN (file 1, run 1). * 

*************************************************************************** 

* Reading Registration Distributions from the following external 

* data file: MEKAGE08.PRN 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.996 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.998 MYR sum not = 1. (will normalize) 

* OBDII 

 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local 

* File 1, Run 1, Scenario 1. 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local mix and speeds 

 M615 Comment: 

 User supplied VMT mix. 

 M583 Warning: 

 The user supplied arterial average speed of 24.0 

 will be used for all hours of the day. 100% of VMT 

 has been assigned to the arterial/collector roadway 

 type for all hours of the day and all vehicle types. 

*** I/M credits for Tech1&2 vehicles were read from the following external 

 data file: TECH12.D 

 M 48 Warning: 

 there are no sales for vehicle class HDGV8b 

 Calendar Year: 2010 

 Month: July 

 Altitude: Low 

 Minimum Temperature: 71.0 (F) 

 Maximum Temperature: 89.6 (F) 

 Minimum Rel. Hum.: 47.0 (%) 

 Maximum Rel. Hum.: 91.0 (%) 

 Barometric Pressure: 30.00 (inches Hg) 

 Nominal Fuel RVP: 7.8 psi 

 Weathered RVP: 7.5 psi 

 Fuel Sulfur Content: 30. ppm 

 Exhaust I/M Program: Yes 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 15
 Evap I/M Program: Yes 

 ATP Program: Yes 

 Reformulated Gas: No 

 Vehicle Type: LDGV LDGT12 LDGT34 LDGT HDGV LDDV LDDT HDDV MC All Veh 

 GVWR: <6000 >6000 (All) 

 ----- ------ ------ ------ ----- ----- ----- ----- ----- ------ 

VMT Distribution: 0.3748 0.4066 0.1385 0.0344 0.0003 0.0021 0.0377 0.0056 1.0000 

 ------------------------------------------------------------------------------------------------ 

Composite Emission Factors (g/mi): 

Composite VOC : 0.571 0.949 0.525 0.841 0.692 0.185 0.304 0.326 3.02 0.726 

Composite NOX : 0.391 0.665 0.543 0.634 1.527 0.315 0.407 3.645 0.96 0.688 

 ------------------------------------------------------------------------------------------------ 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 16
MOBILE6 INPUT FILE : 

> Other Counties I/M Baseline Analysis for 2010 

> with DAQ generated vehicle mix 

POLLUTANTS : NOX HC 

SPREADSHEET : Other Counties, NOX VOC 

RUN DATA : 

***************** RUN SECTION ********** 

FUEL RVP : 9.0 

REG DIST : ncage08.prn 

HOURLY TEMPERATURES: 71.0 73.8 77.0 80.3 82.5 85.4 87.3 88.5 89.1 88.5 89.6 89.2 

 86.3 82.6 77.8 77.5 76.2 75.9 75.0 74.0 73.2 82.3 71.6 71.0 

> IDLE 

I/M PROGRAM : 1 2008 2050 1 T/O IDLE 

I/M MODEL YEARS : 1 1968 2000 

I/M VEHICLES : 1 21111 11111111 1 

I/M STRINGENCY : 1 20.0 

I/M COMPLIANCE : 1 100.0 

I/M WAIVER RATES : 1 0.0 0.0 

> OBDII 

I/M PROGRAM : 2 2008 2050 1 T/O OBD I/M 

I/M MODEL YEARS : 2 2001 2050 

I/M VEHICLES : 2 21111 11111111 1 

I/M STRINGENCY : 2 20.0 

I/M COMPLIANCE : 2 100.0 

I/M WAIVER RATES : 2 0.0 0.0 

I/M PROGRAM : 3 2008 2050 1 T/O EVAP OBD 

I/M MODEL YEARS : 3 2001 2050 

I/M VEHICLES : 3 21111 11111111 1 

I/M STRINGENCY : 3 20.0 

I/M COMPLIANCE : 3 100.0 

I/M WAIVER RATES : 3 0.0 0.0 

ANTI-TAMP PROG : 

91 76 50 22222 22222222 2 11 095. 22212222 

************ SCENARIO SECTION ******** 

SCENARIO RECORD : Urban local 

CALENDAR YEAR : 2010 

EVALUATION MONTH : 7 

> Urban local mix and speeds 

VMT FRACTIONS : 

0.3751 0.0939 0.3127 0.0963 0.0443 0.0388 0.0037 0.0031 

0.0024 0.0086 0.0021 0.0023 0.0082 0.0019 0.0010 0.0056 

AVERAGE SPEED : 24 Arterial 0.0 100.0 0.0 0.0 

RELATIVE HUMIDITY : 91. 86. 78. 71. 65. 59. 53. 50. 48. 51. 47. 47. 

 53. 61. 70. 71. 76. 77. 79. 83. 85. 87. 88. 91. 

BAROMETRIC PRES : 30 

END OF RUN : 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 17
*************************************************************************** 

* MOBILE6.2.03 (24-Sep-2003) * 

* Input file: PCNV10B.IN (file 1, run 1). * 

*************************************************************************** 

* Reading Registration Distributions from the following external 

* data file: NCAGE08.PRN 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.997 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.997 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

* IDLE 

* OBDII 

 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local 

* File 1, Run 1, Scenario 1. 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local mix and speeds 

 M615 Comment: 

 User supplied VMT mix. 

 M583 Warning: 

 The user supplied arterial average speed of 24.0 

 will be used for all hours of the day. 100% of VMT 

 has been assigned to the arterial/collector roadway 

 type for all hours of the day and all vehicle types. 

*** I/M credits for Tech1&2 vehicles were read from the following external 

 data file: TECH12.D 

 M 48 Warning: 

 there are no sales for vehicle class HDGV8b 

 Calendar Year: 2010 

 Month: July 

 Altitude: Low 

 Minimum Temperature: 71.0 (F) 

 Maximum Temperature: 89.6 (F) 

 Minimum Rel. Hum.: 47.0 (%) 

 Maximum Rel. Hum.: 91.0 (%) 

 Barometric Pressure: 30.00 (inches Hg) 

 Nominal Fuel RVP: 9.0 psi 

 Weathered RVP: 8.6 psi 

 Fuel Sulfur Content: 30. ppm 

 Exhaust I/M Program: Yes 

 Evap I/M Program: Yes 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 18
 ATP Program: Yes 

 Reformulated Gas: No 

 Vehicle Type: LDGV LDGT12 LDGT34 LDGT HDGV LDDV LDDT HDDV MC All Veh 

 GVWR: <6000 >6000 (All) 

 ----- ------ ------ ------ ----- ----- ----- ----- ----- ------ 

VMT Distribution: 0.3748 0.4066 0.1386 0.0349 0.0003 0.0021 0.0372 0.0056 1.0000 

 ------------------------------------------------------------------------------------------------ 

Composite Emission Factors (g/mi): 

Composite VOC : 0.954 1.778 1.405 1.684 1.473 0.257 0.512 0.397 3.55 1.363 

Composite NOX : 0.574 1.009 1.008 1.009 2.240 0.437 0.654 4.752 0.97 1.027 

 ------------------------------------------------------------------------------------------------ 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 19
MOBILE6 INPUT FILE : 

> Cabarrus & Union Counties I/M SIP analysis NC run for 2010 

> with default starts and 92% compliance instead of 95% 

POLLUTANTS : NOX HC 

SPREADSHEET : Cabarrus & Union Counties, NOX VOC 

RUN DATA : 

***************** RUN SECTION ********** 

FUEL RVP : 9.0 

REG DIST : ncage08.prn 

HOURLY TEMPERATURES: 71.0 73.8 77.0 80.3 82.5 85.4 87.3 88.5 89.1 88.5 89.6 89.2 

 86.3 82.6 77.8 77.5 76.2 75.9 75.0 74.0 73.2 82.3 71.6 71.0 

> OBDII 

I/M PROGRAM : 1 2003 2050 1 TRC OBD I/M 

I/M MODEL YEARS : 1 1996 2050 

I/M VEHICLES : 1 22222 11111111 1 

I/M STRINGENCY : 1 10.0 

I/M COMPLIANCE : 1 92.0 

I/M WAIVER RATES : 1 5.0 5.0 

I/M PROGRAM : 2 2003 2050 1 TRC EVAP OBD 

I/M MODEL YEARS : 2 1996 2050 

I/M VEHICLES : 2 22222 11111111 1 

I/M STRINGENCY : 2 10.0 

I/M COMPLIANCE : 2 92.0 

I/M WAIVER RATES : 2 5.0 5.0 

ANTI-TAMP PROG : 

91 76 50 22222 22222222 2 11 095. 22212222 

************ SCENARIO SECTION ******** 

SCENARIO RECORD : Urban local-Cabarrus and Union Counties 

CALENDAR YEAR : 2010 

EVALUATION MONTH : 7 

> Urban local mix and speeds 

VMT FRACTIONS : 

0.3751 0.0939 0.3127 0.0963 0.0443 0.0388 0.0037 0.0031 

0.0024 0.0086 0.0021 0.0023 0.0082 0.0019 0.0010 0.0056 

AVERAGE SPEED : 24 Arterial 0.0 100.0 0.0 0.0 

RELATIVE HUMIDITY : 91. 86. 78. 71. 65. 59. 53. 50. 48. 51. 47. 47. 

 53. 61. 70. 71. 76. 77. 79. 83. 85. 87. 88. 91. 

BAROMETRIC PRES : 30 

END OF RUN : 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 20
*************************************************************************** 

* MOBILE6.2.03 (24-Sep-2003) * 

* Input file: CUNV10C.IN (file 1, run 1). * 

*************************************************************************** 

* Reading Registration Distributions from the following external 

* data file: NCAGE08.PRN 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.997 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.997 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

* OBDII 

 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local-Cabarrus and Union Counties 

* File 1, Run 1, Scenario 1. 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local mix and speeds 

 M615 Comment: 

 User supplied VMT mix. 

 M583 Warning: 

 The user supplied arterial average speed of 24.0 

 will be used for all hours of the day. 100% of VMT 

 has been assigned to the arterial/collector roadway 

 type for all hours of the day and all vehicle types. 

*** I/M credits for Tech1&2 vehicles were read from the following external 

 data file: TECH12.D 

 M 48 Warning: 

 there are no sales for vehicle class HDGV8b 

 Calendar Year: 2010 

 Month: July 

 Altitude: Low 

 Minimum Temperature: 71.0 (F) 

 Maximum Temperature: 89.6 (F) 

 Minimum Rel. Hum.: 47.0 (%) 

 Maximum Rel. Hum.: 91.0 (%) 

 Barometric Pressure: 30.00 (inches Hg) 

 Nominal Fuel RVP: 9.0 psi 

 Weathered RVP: 8.6 psi 

 Fuel Sulfur Content: 30. ppm 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 21
 Exhaust I/M Program: Yes 

 Evap I/M Program: Yes 

 ATP Program: Yes 

 Reformulated Gas: No 

 Vehicle Type: LDGV LDGT12 LDGT34 LDGT HDGV LDDV LDDT HDDV MC All Veh 

 GVWR: <6000 >6000 (All) 

 ----- ------ ------ ------ ----- ----- ----- ----- ----- ------ 

VMT Distribution: 0.3748 0.4066 0.1386 0.0349 0.0003 0.0021 0.0372 0.0056 1.0000 

 ------------------------------------------------------------------------------------------------ 

Composite Emission Factors (g/mi): 

Composite VOC : 0.960 1.619 1.263 1.528 1.473 0.257 0.512 0.397 3.55 1.280 

Composite NOX : 0.534 0.865 0.882 0.869 2.240 0.437 0.654 4.752 0.97 0.936 

 ------------------------------------------------------------------------------------------ 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 22
MOBILE6 INPUT FILE : 

> Lincoln, Iredell, Rowan Counties I/M SIP analysis NC run for 2010 

> with default starts and 92% compliance instead of 95% 

POLLUTANTS : NOX HC 

SPREADSHEET : Lincoln, Iredell, Rowan, NOX VOC 

RUN DATA : 

***************** RUN SECTION ********** 

FUEL RVP : 9.0 

REG DIST : ncage08.prn 

HOURLY TEMPERATURES: 71.0 73.8 77.0 80.3 82.5 85.4 87.3 88.5 89.1 88.5 89.6 89.2 

 86.3 82.6 77.8 77.5 76.2 75.9 75.0 74.0 73.2 82.3 71.6 71.0 

> OBDII 

I/M PROGRAM : 1 2004 2050 1 TRC OBD I/M 

I/M MODEL YEARS : 1 1996 2050 

I/M VEHICLES : 1 22222 11111111 1 

I/M STRINGENCY : 1 10.0 

I/M COMPLIANCE : 1 92.0 

I/M WAIVER RATES : 1 5.0 5.0 

I/M PROGRAM : 2 2004 2050 1 TRC EVAP OBD 

I/M MODEL YEARS : 2 1996 2050 

I/M VEHICLES : 2 22222 11111111 1 

I/M STRINGENCY : 2 10.0 

I/M COMPLIANCE : 2 92.0 

I/M WAIVER RATES : 2 5.0 5.0 

ANTI-TAMP PROG : 

91 76 50 22222 22222222 2 11 095. 22212222 

************ SCENARIO SECTION ******** 

SCENARIO RECORD : Urban local-Lincoln, Iredell and Rowan Counites 

CALENDAR YEAR : 2010 

EVALUATION MONTH : 7 

> Urban local mix and speeds 

VMT FRACTIONS : 

0.3751 0.0939 0.3127 0.0963 0.0443 0.0388 0.0037 0.0031 

0.0024 0.0086 0.0021 0.0023 0.0082 0.0019 0.0010 0.0056 

AVERAGE SPEED : 24 Arterial 0.0 100.0 0.0 0.0 

RELATIVE HUMIDITY : 91. 86. 78. 71. 65. 59. 53. 50. 48. 51. 47. 47. 

 53. 61. 70. 71. 76. 77. 79. 83. 85. 87. 88. 91. 

BAROMETRIC PRES : 30 

END OF RUN : 

 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 23
*************************************************************************** 

* MOBILE6.2.03 (24-Sep-2003) * 

* Input file: RLINV10C.IN (file 1, run 1). * 

*************************************************************************** 

* Reading Registration Distributions from the following external 

* data file: NCAGE08.PRN 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.997 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.997 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 1.00 MYR sum not = 1. (will normalize) 

 M 49 Warning: 

 0.999 MYR sum not = 1. (will normalize) 

* OBDII 

 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local-Lincoln, Iredell and Rowan Counites 

* File 1, Run 1, Scenario 1. 

* # # # # # # # # # # # # # # # # # # # # # # # # # 

* Urban local mix and speeds 

 M615 Comment: 

 User supplied VMT mix. 

 M583 Warning: 

 The user supplied arterial average speed of 24.0 

 will be used for all hours of the day. 100% of VMT 

 has been assigned to the arterial/collector roadway 

 type for all hours of the day and all vehicle types. 

*** I/M credits for Tech1&2 vehicles were read from the following external 

 data file: TECH12.D 

 M 48 Warning: 

 there are no sales for vehicle class HDGV8b 

 Calendar Year: 2010 

 Month: July 

 Altitude: Low 

 Minimum Temperature: 71.0 (F) 

 Maximum Temperature: 89.6 (F) 

 Minimum Rel. Hum.: 47.0 (%) 

 Maximum Rel. Hum.: 91.0 (%) 

 Barometric Pressure: 30.00 (inches Hg) 

 Nominal Fuel RVP: 9.0 psi 

 Weathered RVP: 8.6 psi 

 Fuel Sulfur Content: 30. ppm 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 24
 Exhaust I/M Program: Yes 

 Evap I/M Program: Yes 

 ATP Program: Yes 

 Reformulated Gas: No 

 Vehicle Type: LDGV LDGT12 LDGT34 LDGT HDGV LDDV LDDT HDDV MC All Veh 

 GVWR: <6000 >6000 (All) 

 ----- ------ ------ ------ ----- ----- ----- ----- ----- ------ 

VMT Distribution: 0.3748 0.4066 0.1386 0.0349 0.0003 0.0021 0.0372 0.0056 1.0000 

 ------------------------------------------------------------------------------------------------ 

Composite Emission Factors (g/mi): 

Composite VOC : 0.960 1.619 1.263 1.528 1.473 0.257 0.512 0.397 3.55 1.280 

Composite NOX : 0.534 0.865 0.882 0.869 2.240 0.437 0.654 4.752 0.97 0.936 

 ------------------------------------------------------------------------------------------- 

North Carolina I/M SIP May 21, 2010 Appendix 1 - 25
APPENDIX 2 

MOBILE Modeling Assumptions 
(This page intentionally left blank)
North Carolina I/M SIP May 21, 2010 Appendix 2 - 1
North Carolina I/M SIP May 21, 2010 Appendix 2 - 2
North Carolina I/M SIP May 21, 2010 Appendix 2 - 3
MOBILE6.2 Modeling Results 

MOBILE6.2 model runs to demonstrate compliance for the 1997 8-hour ozone standards. Since 

Mecklenburg and Gaston Counties were 1-hour ozone maintenance areas, the performance 

standards for these two counties were slightly different from the remaining counties in the 1997 

8-hour ozone nonattainment area (Cabarrus, Lincoln, Rowan, Union Counties and Coddle Creek 

and Davidson Townships in Iredell County). Below are the emission factors for the two 

performance standards that are required to be met and the program target based upon how North 

Carolina’s Inspection and Maintenance (I/M) program is actual run. The North Carolina I/M 

program meets the emission reduction targets in the attainment year. The State of North 

Carolina commits to meeting the performance standard. 

Emission Factors for Mecklenburg and Gaston Counties (grams/mile) 

 VOC NOx 

Performance Standard 0.784 0.750 

Program Target 0.726 0.688 

Emission Factors for Remaining Counties (grams/mile) 

 VOC NOx 

Performance Standard 1.363 1.027 

Program Target 1.280 0.936 

 

North Carolina I/M SIP May 21, 2010 Appendix 2 - 4
MOBILE6.2 Modeling Assumptions 

Modeled Calendar Year:

• As required by the Code of Federal Regulations (CFR) 40 CFR 51.352(e) the evaluation 

date is to be set at six years after the effective date of designation. The CharlotteGastonia-Rock Hill, North Carolina-South Carolina Moderate Nonattainment area 

(referred to as the Metrolina area) has an effective designated date of June 15, 2004, 

therefore, the evaluation date is 2010. 

I/M Program Start Year:

• Performance Standards for Mecklenburg and Gaston Counties: According to 51.352(c), 

the required start date was 2002, with the idle test for 1968 to 1995 vehicles and On 

Board Diagnostic II (OBD) for 1996 and newer vehicles. 

• Program Target for Mecklenburg and Gaston Counties: Although these two counties had 

the idle test implemented in prior to 2002, the OBD I/M program was implemented in 

these two counties starting July 2002 for all 1996 and newer vehicles. By the evaluation 

year (2010), the idle test had been phased-out and only the OBD test was required. 

Therefore, the I/M program start year for Mecklenburg and Gaston Counties was set at 

2003. 

• Performance Standards for Remaining Counties: According to 51.352(e), the required 

start date was 2008, with the idle test for 1968 to 2000 vehicles and On Board Diagnostic 

II (OBD) for 2001 and newer vehicles. 

• Program Target for Cabarrus and Union Counties: Although these two counties had the 

idle test implemented in prior to 2002, the OBD I/M program was implemented in these 

two counties starting July 2002 for all 1996 and newer vehicles. By the evaluation year 

(2010), the idle test had been phased-out and only the OBD test was required. Therefore, 

the I/M program start year for Cabarrus and Union Counties was set at 2003. 

• Program Target for Iredell, Lincoln and Rowan Counties: The OBD I/M program, for all 

1996 and newer vehicles, was implemented in Iredell and Rowan Counties starting July 

2003 and in Lincoln County starting January 2004. Therefore, the I/M program start year 

for Cabarrus and Union Counties was set at 2003. 

Anti-Tampering Program:

• North Carolina began a statewide safety inspection program in 1975. This program 

includes checking the vehicle for tampering of emission control equipment. Vehicles 35 

years old and newer are inspected. 

Vehicle Registration and VMT mix:

• North Carolina Division of Air Quality (NCDAQ) receives vehicle registration data for 

Mecklenburg and Gaston Counties combined and for the remaining counties in that 

nonattainment area uses the statewide vehicle registration data. The 2008 vehicle 

registration data, the most recent data available, was used for these runs. The vehicle 

registration data is attached at the end of this summary. 

North Carolina I/M SIP May 21, 2010 Appendix 2 - 5
• The VMT mix was based on the latest data available from the transportation partners and 

is presented below. 

0.3751 0.0939 0.3127 0.0963 0.0443 0.0388 0.0037 0.0031 

0.0024 0.0086 0.0021 0.0023 0.0082 0.0019 0.0010 0.0056 

Vehicle Speeds:

• To minimize the number of runs as recommended by the United States Environmental 

Protection Agency (USEPA), one vehicle speed of 24 miles per hour was used for all 

runs. 

Reid Vapor Pressure:

• For Mecklenburg and Gaston Counties, the Reid Vapor Pressure (RVP) is 7.8 pounds per 

square inch (psi) during the summer months as required by 40 CFR 80.27. 

• For the remaining nonattainment counties, the RVP is 9.0 psi during the summer months. 

Temperature, Relative Humidity and Barometric Pressure:

• The temperature, relative humidity and barometric pressure used in these modeling runs 

were the same data used in the latest attainment demonstration plan. This data was based 

on average July 2002 data for the Metrolina region. 

• The hourly temperature data as formatted in the input files: 

71.0 73.8 77.0 80.3 82.5 85.4 87.3 88.5 89.1 88.5 89.6 89.2

86.3 82.6 77.8 77.5 76.2 75.9 75.0 74.0 73.2 82.3 71.6 71.0

• The hourly relative humidity data as formatted in the input files: 

91. 86. 78. 71. 65. 59. 53. 50. 48. 51. 47. 47.

53. 61. 70. 71. 76. 77. 79. 83. 85. 87. 88. 91.

• The barometric pressure is set to 30 inches of mercury, which is consistent with the 

average summertime barometric pressure in North Carolina. 

Altitude:

• North Carolina is considered a low altitude region for modeling purposes. 

North Carolina I/M SIP May 21, 2010 Appendix 2 - 6
*Convert MOBILE5 Registration Fractions to MOBILE6-Based Registration Fractions

*

*Calendar Year: 2008.000User-Input

*

*MOBILE5b Reg Fractions

* 0.081 0.081 0.076 0.077 0.076 0.073 0.070 0.065 0.067 0.059

* 0.049 0.043 0.034 0.034 0.025 0.020 0.015 0.011 0.009 0.007

* 0.005 0.004 0.003 0.002 0.015

* 0.042 0.058 0.063 0.055 0.063 0.059 0.060 0.064 0.065 0.061

* 0.054 0.050 0.039 0.040 0.038 0.026 0.019 0.016 0.015 0.017

* 0.015 0.013 0.012 0.008 0.049

* 0.122 0.153 0.111 0.094 0.079 0.059 0.042 0.050 0.053 0.051

* 0.035 0.035 0.018 0.024 0.012 0.011 0.005 0.005 0.005 0.006

* 0.005 0.004 0.002 0.003 0.018

* 0.101 0.109 0.136 0.094 0.077 0.074 0.044 0.053 0.062 0.052

* 0.025 0.036 0.017 0.020 0.012 0.007 0.007 0.005 0.006 0.007

* 0.006 0.006 0.005 0.004 0.034

* 0.061 0.051 0.097 0.068 0.045 0.057 0.053 0.050 0.050 0.045

* 0.031 0.026 0.034 0.034 0.019 0.024 0.023 0.013 0.012 0.010

* 0.013 0.022 0.026 0.034 0.101

* 0.040 0.046 0.100 0.078 0.078 0.076 0.065 0.070 0.061 0.085

* 0.023 0.052 0.039 0.035 0.028 0.021 0.013 0.011 0.014 0.006

* 0.007 0.007 0.008 0.006 0.031

* 0.062 0.114 0.108 0.105 0.076 0.058 0.051 0.066 0.073 0.068

* 0.035 0.042 0.024 0.030 0.015 0.011 0.007 0.010 0.011 0.008

* 0.006 0.005 0.003 0.003 0.005

* 0.088 0.123 0.107 0.094 0.069 0.077 0.059 0.053 0.047 0.040

* 0.032 0.024 0.021 0.020 0.014 0.014 0.010 0.007 0.005 0.006

* 0.005 0.006 0.009 0.008 0.060

*

*

* MOBILE6 Vehicle Classes:

* 1 LDV Light-Duty Vehicles (Passenger Cars)

* 2 LDT1 Light-Duty Trucks 1 (0-6,000 lbs. GVWR, 0-3750 lbs. LVW)

* 3 LDT2 Light Duty Trucks 2 (0-6,000 lbs. GVWR, 3751-5750 lbs. LVW)

* 4 LDT3 Light Duty Trucks 3 (6,001-8500 lbs. GVWR, 0-3750 lbs. LVW)

* 5 LDT4 Light Duty Trucks 4 (6,001-8500 lbs. GVWR, 3751-5750 lbs. LVW)

* 6 HDV2B Class 2b Heavy Duty Vehicles (8501-10,000 lbs. GVWR)

* 7 HDV3 Class 3 Heavy Duty Vehicles (10,001-14,000 lbs. GVWR)

* 8 HDV4 Class 4 Heavy Duty Vehicles (14,001-16,000 lbs. GVWR)

* 9 HDV5 Class 5 Heavy Duty Vehicles (16,001-19,500 lbs. GVWR)

* 10 HDV6 Class 6 Heavy Duty Vehicles (19,501-26,000 lbs. GVWR)

North Carolina I/M SIP May 21, 2010 Appendix 2 - 7
* 11 HDV7 Class 7 Heavy Duty Vehicles (26,001-33,000 lbs. GVWR)

* 12 HDV8A Class 8a Heavy Duty Vehicles (33,001-60,000 lbs. GVWR)

* 13 HDV8B Class 8b Heavy Duty Vehicles (>60,000 lbs. GVWR)

* 14 HDBS School Busses

* 15 HDBT Transit and Urban Busses

* 16 MC Motorcycles (All)

*

REG DIST

* RESULTING MOBILE6-BASED REGISTRATION FRACTIONS

*

*MOBILE6 REGISTRATION FRACTIONS BY VEHICLE CLASS AND AGE

* LDV M5 LDGV

 1 0.081 0.081 0.076 0.077 0.076 0.073 0.070 0.065 0.067 0.059

 0.049 0.043 0.034 0.034 0.025 0.020 0.015 0.011 0.009 0.007

 0.005 0.004 0.003 0.002 0.015

* LDT1 M5 LDGT1

 2 0.042 0.058 0.063 0.055 0.063 0.059 0.060 0.064 0.065 0.061

 0.054 0.050 0.039 0.040 0.038 0.026 0.019 0.016 0.015 0.017

 0.015 0.013 0.012 0.008 0.049

* LDT2 M5 LDGT1

 3 0.042 0.058 0.063 0.055 0.063 0.059 0.060 0.064 0.065 0.061

 0.054 0.050 0.039 0.040 0.038 0.026 0.019 0.016 0.015 0.017

 0.015 0.013 0.012 0.008 0.049

* LDT3 M5 LDGT2

 4 0.122 0.153 0.111 0.094 0.079 0.059 0.042 0.050 0.053 0.051

 0.035 0.035 0.018 0.024 0.012 0.011 0.005 0.005 0.005 0.006

 0.005 0.004 0.002 0.003 0.018

* LDT4 M5 LDGT2

 5 0.122 0.153 0.111 0.094 0.079 0.059 0.042 0.050 0.053 0.051

 0.035 0.035 0.018 0.024 0.012 0.011 0.005 0.005 0.005 0.006

 0.005 0.004 0.002 0.003 0.018

* HDV2B M5 HDVs (Combined HDGV and HDDV)

 6 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDV3 M5 HDVs (Combined HDGV and HDDV)

 7 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDV4 M5 HDVs (Combined HDGV and HDDV)

 8 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

North Carolina I/M SIP May 21, 2010 Appendix 2 - 8
 0.006 0.006 0.004 0.004 0.019

* HDV5 M5 HDVs (Combined HDGV and HDDV)

 9 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDV6 M5 HDVs (Combined HDGV and HDDV)

 10 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDV7 M5 HDVs (Combined HDGV and HDDV)

 11 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDV8a M5 HDVs (Combined HDGV and HDDV)

 12 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDV8b M5 HDVs (Combined HDGV and HDDV)

 13 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDBS M5 HDVs (Combined HDGV and HDDV)

 14 0.082 0.112 0.122 0.099 0.077 0.066 0.048 0.060 0.067 0.060

 0.030 0.039 0.021 0.025 0.013 0.009 0.007 0.008 0.009 0.008

 0.006 0.006 0.004 0.004 0.019

* HDBT M5 HDDVs

 15 0.062 0.114 0.108 0.105 0.076 0.058 0.051 0.066 0.073 0.068

 0.035 0.042 0.024 0.030 0.015 0.011 0.007 0.010 0.011 0.008

 0.006 0.005 0.003 0.003 0.005

* Motorcycles M5 MC

 16 0.088 0.123 0.107 0.094 0.069 0.077 0.059 0.053 0.047 0.040

 0.032 0.024 0.021 0.020 0.014 0.014 0.010 0.007 0.005 0.006

 0.005 0.006 0.009 0.008 0.060

North Carolina I/M SIP May 21, 2010 Appendix 2 - 9
*Convert MOBILE5 Registration Fractions to MOBILE6-Based Registration Fractions

*

*Calendar Year: 2008.000User-Input

*

*MOBILE5b Reg Fractions

* 0.046 0.062 0.061 0.067 0.065 0.063 0.063 0.061 0.067 0.062

* 0.054 0.050 0.042 0.045 0.035 0.029 0.023 0.018 0.015 0.013

* 0.010 0.008 0.006 0.005 0.031

* 0.025 0.037 0.040 0.042 0.052 0.048 0.048 0.052 0.057 0.054

* 0.052 0.052 0.041 0.046 0.048 0.034 0.027 0.024 0.023 0.028

* 0.026 0.022 0.021 0.015 0.083

* 0.051 0.075 0.074 0.067 0.071 0.056 0.045 0.050 0.056 0.051

* 0.040 0.044 0.032 0.041 0.030 0.022 0.016 0.014 0.017 0.021

* 0.018 0.012 0.014 0.010 0.072

* 0.042 0.049 0.057 0.050 0.052 0.047 0.039 0.048 0.052 0.046

* 0.032 0.038 0.031 0.039 0.028 0.020 0.018 0.016 0.019 0.024

* 0.023 0.018 0.020 0.016 0.177

* 0.031 0.038 0.101 0.079 0.058 0.060 0.063 0.056 0.058 0.043

* 0.030 0.024 0.028 0.025 0.016 0.016 0.013 0.019 0.014 0.012

* 0.010 0.023 0.033 0.037 0.111

* 0.032 0.046 0.083 0.069 0.080 0.078 0.066 0.075 0.060 0.078

* 0.020 0.058 0.040 0.031 0.025 0.020 0.014 0.012 0.014 0.013

* 0.009 0.009 0.013 0.011 0.044

* 0.046 0.080 0.087 0.077 0.064 0.056 0.046 0.063 0.071 0.072

* 0.039 0.049 0.034 0.036 0.026 0.019 0.013 0.015 0.020 0.018

* 0.018 0.014 0.009 0.008 0.019

* 0.077 0.107 0.097 0.085 0.067 0.077 0.064 0.055 0.048 0.041

* 0.031 0.027 0.026 0.020 0.017 0.014 0.009 0.007 0.007 0.007

* 0.007 0.008 0.013 0.011 0.078

*

*

* MOBILE6 Vehicle Classes:

* 1 LDV Light-Duty Vehicles (Passenger Cars)

* 2 LDT1 Light-Duty Trucks 1 (0-6,000 lbs. GVWR, 0-3750 lbs. LVW)

* 3 LDT2 Light Duty Trucks 2 (0-6,000 lbs. GVWR, 3751-5750 lbs. LVW)

* 4 LDT3 Light Duty Trucks 3 (6,001-8500 lbs. GVWR, 0-3750 lbs. LVW)

* 5 LDT4 Light Duty Trucks 4 (6,001-8500 lbs. GVWR, 3751-5750 lbs. LVW)

* 6 HDV2B Class 2b Heavy Duty Vehicles (8501-10,000 lbs. GVWR)

* 7 HDV3 Class 3 Heavy Duty Vehicles (10,001-14,000 lbs. GVWR)

* 8 HDV4 Class 4 Heavy Duty Vehicles (14,001-16,000 lbs. GVWR)

* 9 HDV5 Class 5 Heavy Duty Vehicles (16,001-19,500 lbs. GVWR)

* 10 HDV6 Class 6 Heavy Duty Vehicles (19,501-26,000 lbs. GVWR)

North Carolina I/M SIP May 21, 2010 Appendix 2 - 10
* 11 HDV7 Class 7 Heavy Duty Vehicles (26,001-33,000 lbs. GVWR)

* 12 HDV8A Class 8a Heavy Duty Vehicles (33,001-60,000 lbs. GVWR)

* 13 HDV8B Class 8b Heavy Duty Vehicles (>60,000 lbs. GVWR)

* 14 HDBS School Busses

* 15 HDBT Transit and Urban Busses

* 16 MC Motorcycles (All)

*

REG DIST

* RESULTING MOBILE6-BASED REGISTRATION FRACTIONS

*

*MOBILE6 REGISTRATION FRACTIONS BY VEHICLE CLASS AND AGE

* LDV M5 LDGV

 1 0.046 0.062 0.061 0.067 0.065 0.063 0.063 0.061 0.067 0.062

 0.054 0.050 0.042 0.045 0.035 0.029 0.023 0.018 0.015 0.013

 0.010 0.008 0.006 0.005 0.031

* LDT1 M5 LDGT1

 2 0.025 0.037 0.040 0.042 0.052 0.048 0.048 0.052 0.057 0.054

 0.052 0.052 0.041 0.046 0.048 0.034 0.027 0.024 0.023 0.028

 0.026 0.022 0.021 0.015 0.083

* LDT2 M5 LDGT1

 3 0.025 0.037 0.040 0.042 0.052 0.048 0.048 0.052 0.057 0.054

 0.052 0.052 0.041 0.046 0.048 0.034 0.027 0.024 0.023 0.028

 0.026 0.022 0.021 0.015 0.083

* LDT3 M5 LDGT2

 4 0.051 0.075 0.074 0.067 0.071 0.056 0.045 0.050 0.056 0.051

 0.040 0.044 0.032 0.041 0.030 0.022 0.016 0.014 0.017 0.021

 0.018 0.012 0.014 0.010 0.072

* LDT4 M5 LDGT2

 5 0.051 0.075 0.074 0.067 0.071 0.056 0.045 0.050 0.056 0.051

 0.040 0.044 0.032 0.041 0.030 0.022 0.016 0.014 0.017 0.021

 0.018 0.012 0.014 0.010 0.072

* HDV2B M5 HDVs (Combined HDGV and HDDV)

 6 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDV3 M5 HDVs (Combined HDGV and HDDV)

 7 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDV4 M5 HDVs (Combined HDGV and HDDV)

 8 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

North Carolina I/M SIP May 21, 2010 Appendix 2 - 11
 0.020 0.016 0.015 0.012 0.097

* HDV5 M5 HDVs (Combined HDGV and HDDV)

 9 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDV6 M5 HDVs (Combined HDGV and HDDV)

 10 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDV7 M5 HDVs (Combined HDGV and HDDV)

 11 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDV8a M5 HDVs (Combined HDGV and HDDV)

 12 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDV8b M5 HDVs (Combined HDGV and HDDV)

 13 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDBS M5 HDVs (Combined HDGV and HDDV)

 14 0.044 0.065 0.072 0.064 0.058 0.052 0.043 0.056 0.062 0.059

 0.036 0.044 0.033 0.037 0.027 0.020 0.015 0.015 0.019 0.021

 0.020 0.016 0.015 0.012 0.097

* HDBT M5 HDDVs

 15 0.046 0.080 0.087 0.077 0.064 0.056 0.046 0.063 0.071 0.072

 0.039 0.049 0.034 0.036 0.026 0.019 0.013 0.015 0.020 0.018

 0.018 0.014 0.009 0.008 0.019

* Motorcycles M5 MC

 16 0.077 0.107 0.097 0.085 0.067 0.077 0.064 0.055 0.048 0.041

 0.031 0.027 0.026 0.020 0.017 0.014 0.009 0.007 0.007 0.007

 0.007 0.008 0.013 0.011 0.078

North Carolina I/M SIP May 21, 2010 Appendix 2 - 12
APPENDIX 3 

I/M Budget: Fiscal Years 2010-2011 
(This page intentionally left blank)
DAQ Tools and Resources 

The Division of Air Quality dedicates ten positions to the I/M Program: 

• An Environmental Program Manager, primary duties are to supervise the Mobile Sources 

Compliance Branch. 

• A lead Environmental Engineer, primary purpose of this position is to oversee the 

Inspection/Maintenance (I/M) Program and act as a liaison with DMV. 

• A staff level Environmental Engineer, primary purpose of this position is to perform staff-level 

engineering technical services in support of the state’s inspection/maintenance (I/M) program. 

• An audit coordinating specialist, primary duties are to develop and execute procedures for the 

evaluation of the inspection and maintenance program (I/M) and to coordinate regional audit staff 

tasks to measure the effectiveness of the inspection and maintenance program and identify areas 

for improvement.

• Six regional Senior Technicians (auditors), primary duties are performs an ongoing survey to 

determine the field vehicle compliance rate and visits inspection stations to audit DMV’s 

implementation of the program. 

These are all existing funded positions, funded through a dedicated, non-reverting account. 

North Carolina I/M SIP May 21, 2010         Appendix 3‐1
North Carolina I/M SIP May 21, 2010 Appendix 3-2
North Carolina I/M SIP May 21, 2010 Appendix 3-3
DMV Tools and Resources

The Division of Motor Vehicles License and Theft Bureau dedicates 214 positions to the I/M program. 

• 147 sworn law enforcement agents, primary duties are program management, issuing waivers, 

exemptions, covert audits, remote audits, and enforcement of violations. 

• 61 civilian auditors, primary duties are performing overt and covert audits, and remote audits. 

• Six civilian Call Center operators, primary duties are to assist citizens with complaints, and 

inquiries on the emission inspection requirements and information. 

These are all existing funded positions, funded through a dedicated, non-reverting account. 

North Carolina I/M SIP May 21, 2010         Appendix 3 ‐4
Fund 1500/HF01 Highway Fund

Funds Center 1500/150054 DMV Exh Emiss InspCommitment Item Budget 09/10 Commits. Actuals Avl.Budget 09/10 Budget 10/11 Budget 11/12

*** 1500/01 Revenue (37,329,087.00) 0.00 0.00 (37,329,087.00) (37,329,087.00) (37,329,087.00)** 1500/45400024 Auto Ems Insp Fee (15,095,754.00) 0.00 0.00 (15,095,754.00) (15,095,754.00) (15,095,754.00)** 1500/47900030 Tele Serv - DMV (22,233,333.00) 0.00 0.00 (22,233,333.00) (22,233,333.00) (22,233,333.00)*** 1500/02 Total Requirements 37,329,087.00 7,481,548.60 9,234,958.44 20,612,579.96 36,571,877.00 36,571,877.00** 1500/02-01 PERSONNEL 11,424,786.00 1,226,929.02 5,509,504.45 4,688,352.53 11,424,786.00 11,424,786.00

* 1500/02-01-01 SALARIES 7,591,007.00 0.00 4,073,607.38 3,517,399.62 7,591,007.00 7,591,007.00

 1500/51211000 Salaries & Wages 3,153,765.00 0.00 1,506,796.13 1,646,968.87 3,153,765.00 3,153,765.00 1500/51211016 Pay Add Per Ann Rate 139,625.00 0.00 84,926.60 54,698.40 139,625.00 139,625.00 1500/51411000 Sal & Wages Overtime 7,000.00 0.00 4,473.50 2,526.50 7,000.00 7,000.00

 1500/51411002 Pay Add Overtime 200.00 0.00 98.61 101.39 200.00 200.00

 1500/51431000 Sal & Wages Prem Pay 2,000.00 0.00 1,316.05 683.95 2,000.00 2,000.00

 1500/51431001 Pay Add Prem Pay 200.00 0.00 29.91 170.09 200.00 200.00 1500/51461000 S/W Long Pay StateFd 130,348.00 0.00 70,268.95 60,079.05 130,348.00 130,348.00

 1500/51461001 Pay Add Long Pay 2,485.00 0.00 1,500.45 984.55 2,485.00 2,485.00

 1500/51625001 Short Term Disab 100.00 0.00 (1,131.24) 1,231.24 100.00 100.00

 1500/51231000 LEO Salaries & Wages 4,155,284.00 0.00 2,405,328.42 1,749,955.58 4,155,284.00 4,155,284.00* 1500/02-01-02 EXP RELATED TO PAYRO 2,191,579.00 0.00 1,201,315.75 990,263.25 2,191,579.00 2,191,579.00

 1500/51511000 Soc Sec Contribution 567,223.00 0.00 309,285.63 257,937.37 567,223.00 567,223.00

 1500/51521000 Retire Contribution 287,073.00 0.00 133,973.53 153,099.47 287,073.00 287,073.00 1500/51531000 Law Enf Of Ret Cont 570,731.00 0.00 338,249.42 232,481.58 570,731.00 570,731.00

 1500/51561000 Med Ins Contribution 763,552.00 0.00 417,863.40 345,688.60 763,552.00 763,552.00 1500/51576000 Dependent Care 3,000.00 0.00 1,943.77 1,056.23 3,000.00 3,000.00* 1500/02-01-03 CONTRACTUAL SERVICES 1,642,200.00 1,226,929.02 234,581.32 180,689.66 1,642,200.00 1,642,200.00

 1500/52140000 Oth Inf Tech Serv 120,000.00 0.00 0.00 120,000.00 120,000.00 120,000.00 1500/52160000 Contr Per Ser Pd Ots 0.00 0.00 0.00 0.00 0.00 0.00

 1500/52173000 Janitorial Services 19,490.00 7,226.32 11,584.77 678.91 19,490.00 19,490.00

 1500/52173000RE Janitorial Serv RE 110.00 0.00 114.05 (4.05) 110.00 110.00

 1500/52174000 Waste Disposal 2,600.00 2,000.00 169.20 430.80 2,600.00 2,600.00

 1500/52199012 Professional Fees 1,500,000.00 1,217,702.70 222,713.30 59,584.00 1,500,000.00 1,500,000.00

** 1500/02-02 OPERATING 25,904,301.00 6,254,619.58 3,725,453.99 15,924,227.43 25,147,091.00 25,147,091.00* 1500/02-02-01 OP SERV & OTHER EXP 22,578,477.00 5,482,194.88 2,753,162.47 14,343,119.65 22,578,477.00 22,578,477.00

 1500/52210000 Energy Services-Elec 5,780.00 0.00 4,353.19 1,426.81 5,780.00 5,780.00 1500/52230000 Energy Ser Wat Sew 710.00 0.00 528.33 181.67 710.00 710.00

 1500/52310000 Repairs to Buildings 50,000.00 0.00 17,676.48 32,323.52 50,000.00 50,000.00 1500/52331002 Int Vehicle Rep Pts 350.00 0.00 226.34 123.66 350.00 350.00

 1500/52331003 Ext Vehicle Rep Pts 1,560.00 0.00 1,157.41 402.59 1,560.00 1,560.00 1500/52333002 Rep/Ser to Eq -Other 76,700.00 832.20 9,249.18 66,618.62 76,700.00 76,700.00

 1500/52333010 Rep Pers Comp/Prin 770.00 0.00 202.58 567.42 770.00 770.00

 1500/52511001 Rent Land 20,500.00 0.00 1,528.00 18,972.00 20,500.00 20,500.00

 1500/52590004 Rent Eq fr Eq Unit 7,770.00 0.00 0.00 7,770.00 7,770.00 7,770.00

 1500/52590005 Rent of Equipment 3,000.00 0.00 0.00 3,000.00 3,000.00 3,000.00 1500/52811000 Telephone Service 32,000.00 0.00 15,427.39 16,572.61 32,000.00 32,000.00 1500/52812000 Telecom Data Charge 21,509,033.00 5,435,759.10 2,577,152.30 13,496,121.60 21,509,033.00 21,509,033.00

North Carolina I/M SIP May 21, 2010 Appendix 3-5
Commitment Item Budget 09/10 Commits. Actuals Avl.Budget 09/10 Budget 10/11 Budget 11/12

 1500/52814000 State Own/Rent Pager 500.00 0.00 0.00 500.00 500.00 500.00 1500/52814001 St Own Wireless Phon 59,400.00 0.00 26,791.06 32,608.94 59,400.00 59,400.00 1500/52817000 Internet Serv Prov 2,300.00 1,140.00 1,140.00 20.00 2,300.00 2,300.00 1500/52821000 Comp Data Proc Serv 14,000.00 0.00 1,252.30 12,747.70 14,000.00 14,000.00 1500/52840001 Post,Fr&D-MailSer 270.00 0.00 0.00 270.00 270.00 270.00 1500/52840002 Post,Fr&Del-Fr&Del 225.00 0.00 0.00 225.00 225.00 225.00 1500/52840003 Post,Fr&Del-Meter 2,870.00 0.00 0.00 2,870.00 2,870.00 2,870.00 1500/52850000 Print, Bind, Dupl 13,080.00 540.00 0.00 12,540.00 13,080.00 13,080.00 1500/52860001 Advertising 650,000.00 20,303.00 4,331.17 625,365.83 650,000.00 650,000.00 1500/52919001 Ins/Bond Prems 2,994.00 0.00 1,945.20 1,048.80 2,994.00 2,994.00

 1500/52942000 Educational Exp 9,800.00 0.00 115.23 9,684.77 9,800.00 9,800.00

 1500/52950000 Emp Moving Exp 800.00 0.00 0.00 800.00 800.00 800.00 1500/52512001 Rent-Building/Office 112,865.00 23,620.58 89,055.81 188.61 112,865.00 112,865.00 1500/52430000 Maint Ag Equipment 500.00 0.00 417.00 83.00 500.00 500.00 1500/52930000 Conference Reg Fees 700.00 0.00 613.50 86.50 700.00 700.00

* 1500/02-02-02 TRAVEL 1,096,822.00 10,242.20 595,301.74 491,278.06 1,096,822.00 1,096,822.00

 1500/52712000 Trans Air-Out State 2,000.00 0.00 0.00 2,000.00 2,000.00 2,000.00 1500/52714000 Tran Gr Emp In State 10,186.00 1,125.44 64.46 8,996.10 10,186.00 10,186.00 1500/52715000 Tran Gr Emp Out St 3,200.00 0.00 0.00 3,200.00 3,200.00 3,200.00

 1500/52717002 Trans Other-In State 2,280.00 144.00 233.66 1,902.34 2,280.00 2,280.00

 1500/52718000 Trans Oth-Out State 750.00 0.00 0.00 750.00 750.00 750.00 1500/52721000 Lodging - In State 21,548.00 6,487.66 765.34 14,295.00 21,548.00 21,548.00

 1500/52722000 Lodg OutState In US 5,460.00 0.00 0.00 5,460.00 5,460.00 5,460.00

 1500/52724000 Meals - In State 18,000.00 2,485.10 1,083.60 14,431.30 18,000.00 18,000.00 1500/52725000 Meals - Out State 2,048.00 0.00 1,786.30 261.70 2,048.00 2,048.00 1500/52714001 Perm Motor Fleet Trn 900,000.00 0.00 559,580.35 340,419.65 900,000.00 900,000.00 1500/52714002 Temp Motor Fleet Trn 40,000.00 0.00 0.00 40,000.00 40,000.00 40,000.00

 1500/52714003 Rental Car Charges 1,350.00 0.00 0.00 1,350.00 1,350.00 1,350.00 1500/52714004 Motor Fleet Pen Mil 90,000.00 0.00 31,788.03 58,211.97 90,000.00 90,000.00* 1500/02-02-03 SUPPLIES & MATERIALS 172,488.00 1,663.05 99,392.56 71,432.39 172,488.00 172,488.00

 1500/53110000 Office Supplies 64,000.00 1,663.05 26,216.87 36,120.08 64,000.00 64,000.00

 1500/53130000 Photo Supplies 2,000.00 0.00 110.63 1,889.37 2,000.00 2,000.00

 1500/53150004 Med & Safety Sup 4,000.00 0.00 651.72 3,348.28 4,000.00 4,000.00

 1500/53210000 Janitorial Supplies 850.00 0.00 0.00 850.00 850.00 850.00

 1500/53280000 Rd Signs & Signals 1,876.00 0.00 0.00 1,876.00 1,876.00 1,876.00

 1500/53310000 Oil, Lub, Fluids 20.00 0.00 0.00 20.00 20.00 20.00

 1500/53310002 Motor Fuel (Other) 21,347.00 0.00 8,276.05 13,070.95 21,347.00 21,347.00 1500/53340000 Tires & Tubes 120.00 0.00 0.00 120.00 120.00 120.00

 1500/53510000 Clothing & Uniforms 63,875.00 0.00 63,725.40 149.60 63,875.00 63,875.00

 1500/53800200 Lic Plates & Sticker 1,000.00 0.00 0.00 1,000.00 1,000.00 1,000.00

 1500/53900005 Bld Gr Mtrls/Sup 1,375.00 0.00 3.56 1,371.44 1,375.00 1,375.00 1500/53900006 Shop Sup & Sm Tools 12,000.00 0.00 408.33 11,591.67 12,000.00 12,000.00 1500/53310004 Rental Car Gas 25.00 0.00 0.00 25.00 25.00 25.00

* 1500/02-02-05 FURNITURE AND EQUIP 1,554,117.00 753,206.00 (38,124.34) 839,035.34 796,907.00 796,907.00

 1500/54511000 Office Furniture 62,012.00 0.00 207.78 61,804.22 62,012.00 62,012.00

 1500/54521000 Office Equipment 17,000.00 0.00 2,405.84 14,594.16 17,000.00 17,000.00 1500/54528000 Voice Comm Eq 283,470.00 0.00 1,571.35 281,898.65 283,470.00 283,470.00

North Carolina I/M SIP May 21, 2010 Appendix 3-6
Commitment Item Budget 09/10 Commits. Actuals Avl.Budget 09/10 Budget 10/11 Budget 11/12

 1500/54528001 Voice Com Eq-No FM 191,000.00 0.00 0.00 191,000.00 191,000.00 191,000.00 1500/54529001 Weapons - Eq 3,270.00 0.00 0.00 3,270.00 3,270.00 3,270.00 1500/54534000 Pers Com Print Pur 224,799.00 0.00 28,285.32 196,513.68 224,799.00 224,799.00 1500/54539003 Misc Equipment 2,000.00 0.00 (71,635.20) 73,635.20 2,000.00 2,000.00

 1500/54539005 LEO Auto Accessories 757,210.00 753,206.00 199.50 3,804.50 0.00 0.00

 1500/54549001 Motor Veh Oper 5,500.00 0.00 0.00 5,500.00 5,500.00 5,500.00

 1500/54710000 Oth Comp Software 3,430.00 0.00 416.50 3,013.50 3,430.00 3,430.00

 1500/54710002 Per Comp Software 2,377.00 0.00 0.00 2,377.00 2,377.00 2,377.00 1500/54220000 RECON ASSET ADDITION 2,049.00 0.00 424.57 1,624.43 2,049.00 2,049.00* 1500/02-02-06 OTHER EXP & ADJUST 502,397.00 7,313.45 315,721.56 179,361.99 502,397.00 502,397.00

 1500/55111001 Cash Settlements 69,000.00 0.00 0.00 69,000.00 69,000.00 69,000.00

 1500/55112001 Public Liab Claims 1,618.00 0.00 0.00 1,618.00 1,618.00 1,618.00

 1500/55120005 Envir Permits Fees 0.00 0.00 0.00 0.00 0.00 0.00

 1500/55232000 LEO Separation Allow 207,194.00 0.00 165,270.51 41,923.49 207,194.00 207,194.00 1500/55830000 Member Dues&Subsc 1,450.00 0.00 0.00 1,450.00 1,450.00 1,450.00

 1500/55900001 Branch Agent Com 0.00 0.00 0.00 0.00 0.00 0.00

 1500/55900004 Spec Investigation 220,110.00 7,313.45 148,187.60 64,608.95 220,110.00 220,110.00 1500/55900005 Saf Insp Invest 0.00 0.00 0.00 0.00 0.00 0.00

 1500/55960000 Elect Pymnt Proc Fee 3,005.00 0.00 2,263.45 741.55 3,005.00 3,005.00 1500/55660001 Serv Chg-Sale of Sur 20.00 0.00 0.00 20.00 20.00 20.00

Total 0.00 7,481,548.60 9,234,958.44 (16,716,507.04) 0.00 0.00

North Carolina I/M SIP May 21, 2010 Appendix 3-7
APPENDIX 4 

Number of Vehicles Included in the I/M Program 
(This page intentionally left blank)
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 1
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 2
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 3
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 4
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 5
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 6
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 7
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 8
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 9
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 10
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 11
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 12
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 13
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 14
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 15
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 16
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 17
Counties Required to Implement I/M

North Carolina I/M SIP May 21, 2010 Appendix 4 - 18
APPENDIX 5 

References 
(This page intentionally left blank)
Links to North Carolina General Statutes can be found on the following web page: 

• http://www.ncleg.net/gascripts/statutes/Statutes.asp 

Links to the North Carolina Administrative Code can be found on the following web page: 

• http://daq.state.nc.us/rules/rules/ 

The North Carolina Analyzer Specifications can be found on the following web page: 

• http://daq.state.nc.us/motor/inspect/analyzer_vendor.shtml 

The newly revised and approved the DAQ Audit Procedures were submitted to EPA on March 5, 2010. 

Additional copies can be provided upon request. 

The DMV manuals can be provided upon request. 

North Carolina I/M SIP May 21, 2010 Appendix 5 - 1
Appendix 6 

List of Abbreviations 
(This page intentionally left blank)
CFR Code of Federal Regulations 

CO carbon monoxide 

DENR Department of Environment and Natural Resources 

DAQ Division of Air Quality 

DMV Division of Motor Vehicles 

EGR exhaust gas recirculation 

EPA Environmental Protection Agency 

EMC Environmental Management Commission 

EMF Emissions Maintenance Fund 

HDV heavy duty vehicle 

I/M inspection and maintenance 

LDV light duty vehicle 

MSA metropolitan statistical area 

NAAQS National Ambient Air Quality Standards 

NC North Carolina 

NCAC North Carolina Administrative Code 

NCDOT North Carolina Department of Transportation 

NCGS North Carolina General Statute 

NOx oxides of nitrogen 

O3 ozone 

OBD On-Board Diagnostic II System 

PCV positive crankcase ventilation 

SIP state implementation plan 

TSB technical service bulletin 

VID vehicle information database 

VIN vehicle identification number 

VOC volatile organic compounds 

North Carolina I/M SIP May 21, 2010 Appendix 6 - 1
Appendix 7 

Public Notice Report, 

Comments Received and Responses 
(This page intentionally left blank)
Public Notice Report 

For 

The North Carolina State Implementation Plan 

Inspection and Maintenance (I/M) Program 

On April 6, 2010, a draft version of Inspection and Maintenance (I/M) Program State 

Implementation Plan (SIP) was submitted to the U. S. Environmental Protection Agency 

(USEPA). A request for public hearing, in accordance with 40 CFR 51.102, and the public 

comment period were noticed in the local newspapers on Monday, April 5, 2010. The public 

comment period was open from April 5, 2010, through May 14, 2010, with no hearing scheduled 

unless one was requested in writing by Wednesday May 5, 2010. No request for public hearing 

was received. There were no comments received on the I/M program SIP. 

Background

The purpose of the I/M Program SIP is to satisfy the USEPA’s requirements for the State to meet 

and/or maintain the National Ambient Air Quality Standards (NAAQS) for carbon monoxide and 

ozone. This document revises the State of North Carolina basic I/M program SIP due to changes 

to the I/M program since the last approved I/M SIP in 1993 and to demonstrate compliance with 

the basic performance standards for the 1997 8-hour ozone standard. The program changes 

include testing vehicles by using the On-board Diagnostic (OBD) system instead of tailpipe 

emissions and the expansion of the program coverage area from nine counties to 48 counties. 

The SIP also demonstrates that North Carolina’s I/M program meets the USEPA basic I/M 

performance standard for the 1997 8-hour ozone NAAQS. 

Summary of Public Notice and Comment Period

The public comment period was from April 5, 2010 through May 14, 2010. The only written 

response received was from Richard A. Schutt, Chief, Air Planning Branch, USEPA, stating that 

they had no comments on the I/M Program SIP. 

Conclusions

Since no comments were received, the North Carolina Division of Air Quality will move forward 

with the final submittal to the USEPA of the State Implementation Plan for the Inspection and 

Maintenance Program. 

Public Notice Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-1 
Public Hearing Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-2
Public Hearing Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-3
Public Hearing Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-4
Public Hearing Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-5
Public Hearing Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-6
Public Hearing Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-7
Public Hearing Report 

North Carolina I/M SIP May 21, 2010 Appendix 7-8