Nonroad Engine Population Estimates
 
Nonroad Engine Population Estimates
 

NR-006e
 

Assessment and Standards Division 

Office of Transportation and Air Quality 

U.S. Environmental Protection Agency 

NOTICE 

This technical report does not necessarily represent final EPA decisions or 

positions. It is intended to present technical analysis of issues using data 

that are currently available. The purpose in the release of such reports is to 

facilitate the exchange of technical information and to inform the public of 

technical developments. 

EPA-420-R-10-017 

NR-006e 

July 2010 
Nonroad Engine Population Estimates 

Report No. NR-006e 

July 2010 

Assessment and Standards Division 

EPA, Office of Transportation and Air Quality 

Purpose 

The purpose of this memorandum is to document the source of the nonroad engine 

population values used in EPA’s final NONROAD2008a emission inventory model. Engine 

populations are provided as default values in EPA’s NONROAD emission inventory model 

categorized by equipment type, power level, and fuel type. This categorization allows the 

NONROAD model to determine the phase-in of new emission standards and other unique 

aspects of emissions or allocations by application, fuel type, or power level. Relative to the 

previous December 2005 version of this report, this version includes population estimates for 

high performance sterndrive and inboard (SD/I) recreational marine engines. 

Introduction 

The default base year application populations are used as a starting point to estimate 

future and past year engine populations in the NONROAD emissions model. The base year is 

either 1996, 1998, 1999, or 2000, depending on the application. The base years are the most 

recent years for which population data are available. The NONROAD model tracks engines 

rather than equipment because present and planned nonroad emissions regulations focus on 

engines instead of equipment. EPA anticipates that future nonroad emission regulations would 

also focus on engines. 

The engine populations were divided into many applications because of the variety of 

ways nonroad engines are used. This variety of applications allows for application-specific 

geographic and temporal allocations, activity, emission rates, and other input factors to 

characterize nonroad engine usage and emissions. 

The engine populations were also divided into 5 fuel types: diesel (2 and 4-stroke 

combined), gasoline 2-stroke, gasoline 4-stroke, compressed natural gas (CNG) (2 and 4-stroke 

combined), and liquid petroleum gas (LPG) (2 and 4-stroke combined). The diesel, CNG, and 

LPG engine populations for 2 and 4-stroke engines were combined because these engines exhibit 

little difference in emission rates between 2 and 4-stroke engines, most likely because these 

engines use fuel injection to deliver the fuel to the combustion chamber. Gasoline 2 and 4-stroke 

engines were separated because of the availability of information indicating widely different 

1 
 

emission rates, especially for hydrocarbon emissions. Each combination of application and fuel 

has been assigned a unique “Source Classification Code” (SCC). 

The engine populations by application and fuel were further divided into 19 power level 

categories to account for emission regulations and some technology differences associated with 

power level. The power level categories provided were 0-1 hp, 1-3 hp, 3-6 hp, 6-11 hp, 11-16 

hp, 16-25 hp, 25-40 hp, 40-50 hp, 50-75 hp, 75-100 hp, 100-175 hp, 175-300 hp, 300-600 hp, 

600-750 hp, 750-1000 hp, 1000-1200, 1200-1500 hp, 1500-2000 hp, 2000-3000 hp, and 3000+ 

hp. While this detailed disaggregation by application, fuel type, and power level allows users to 

make fine distinctions in understanding the effects of control strategies, it also might lead to very 

small engine populations for some states for some application and power segments. 

Appendix A provides the default base year national populations used in final 

NONROAD2008a. A table containing descriptions of each SCC can be found in Appendix B. 

Equipment Inventory Changes and Classifications 

Previous equipment population estimates in the Nonroad Engine and Vehicle Emission 

Study (NEVES) were provided by Power Systems Research (PSR), an independent marketing 

research firm. (1) NEVES used 1989 in-use year estimates from PSR. The PSR population 

estimates were determined from engine manufacturer sales surveys, experimentally determined 

engine life, and surveys of usage of these engines. The population estimates were verified by 

equipment owner surveys over the course of several years. A review and evaluation of the PSR 

methodology was later provided by Pechan, another independent contractor. (2) The NEVES 

work led to development of source category codes (SCCs) for given applications. 

Appendix B describes both significant and minor changes between the SCCs in the 

NEVES report and the NONROAD model. New equipment classes and power range additions 

for some equipment types were included in the NONROAD model, altering the engine 

population estimates. LPG and CNG engines, which were not included in NEVES, were added 

to the NONROAD model. New SCCs were added to accommodate these new engines. There 

were other minor changes that did not affect engine populations but rather changed the 

description of the codes. 

For many categories, final NONROAD2008a uses the 2003 version of the PSR estimates 

of national populations1

, but, as described in the report on geographic allocation, the model uses 

other methods to allocate populations to the state and county level.(3) The exceptions to the use 

of PSR estimates are described in detail in later sections of this report. 

1 Depending on the equipment application, the 2003 version of PSR includes population estimates for the years 1996, 

1998, 1999, and 2000. 

2 
PSR developed engine population estimates for 2 and 4-stroke diesel, gasoline, liquid 

petroleum gas (LPG), and compressed natural gas (CNG) engines, categorized by application 

codes. These populations were further divided by power level for the NONROAD model to 

determine appropriate fleet turnover rates and appropriate engine emission standard phase-in 

strategies. 

Appendix C describes how the PSR application codes correspond to the source 

categorization codes (SCCs). Each source category is uniquely identified with an SCC, which is 

a ten-digit number. The SCC number conventions are summarized in Table 1. The first two 

digits, 22, represent mobile sources. For most categories, the next two digits represent the 

engine or fuel type (60, 65, 67, 68, and 70, represent 2-stroke gasoline, 4-stroke gasoline, LPG, 

CNG, and diesel, respectively). The next three digits represent the segment type (for example, 

recreational or construction). The last three digits represent the specific kind of equipment (for 

example, golf carts or snowmobiles). If the last three digits are zero, it is implied that all 

equipment types in the segment are included. 

In order to apply the emission standards for small spark-ignition (<25 hp other than 

snowmobiles, off-road motorcycles, and all-terrain vehicles) and recreational marine sparkignition engines, the 2 and 4-stroke gasoline, LPG, and CNG engines were combined into one 

category (while still maintaining power level distinctions). The new emission standards intend 

to produce cleaner engines in part by reducing the number of 2-stroke in favor of 4-stroke 

engines. The reasons for combining these engines, and the associated problems, will be 

described in more detail later in this report. 

Mobile and Stationary Nonroad Engines 

One challenge in preparing a mobile source inventory is that engines used for generators, 

pumps, compressors and certain other applications may be either mobile or stationary, and, thus, 

may be subject to different regulations. Therefore it was necessary to estimate the fraction of 

engines used as mobile and stationary emission sources. The NONROAD model estimates 

emissions from ‘mobile’ equipment. The legal definition of a mobile nonroad engine is an 

engine that moves from one place within a 12-month period. (4) In some cases the distinction 

may not be clear because engines that might appear stationary are in fact considered as mobile. 

For example, a palette-mounted engine is easily moved from one site to the next with a forklift 

or other type of lift truck over the course of several months. EPA used the only information 

available, which was derived from a report to the California Air Resources Board by Booz, 

Allen, and Hamilton (5) and given in Table 2, for fractions of engines used in mobile nonroad 

equipment for the few application classes in which some of the engines are used and regulated as 

stationary sources. Hydro power units, irrigation sets, generator sets, pumps, compressors, and 

welders were the applications which were determined to have some stationary engines. The 

fraction of mobile engines was applied to the equipment populations for the appropriate 

applications in order to avoid counting stationary sources in the nonroad mobile sources 

inventory. The model input populations, which are shown in Appendix A, have already been 

3 
reduced according to the percentages shown in Table 2 to represent only the portions of these 

applications considered to be mobile equipment. 

Table 1. SCC Number Conventions (xx refers to ‘60’ for 2-stroke gasoline, ‘65’ for 4-stroke 

gasoline, ‘70’ for diesel, ‘67’ for LPG, and ‘68’ for CNG) 

SCC Definition 

22xx001000 Recreational vehicles 

22xx002000 Construction equipment 

22xx003000 Industrial equipment 

22xx004000 Lawn and garden equipment 

22xx005000 Agricultural equipment 

22xx006000 Commercial equipment 

22xx007000 Logging equipment 

22xx008000 Airport service equipment 

22xx009000 Underground mining equipment 

22xx010000 Oil field equipment 

2282005010 Gasoline 2-stroke outboard recreational marine equipment 

2282005015 Gasoline 2-stroke personal watercraft 

2282010005 Gasoline 4-stroke inboard/sterndrive recreational marine equipment 

2282020005 Diesel inboard recreational marine equipment 

2282020010 Diesel outboard recreational marine equipment 

2285002015 Diesel railway maintenance equipment 

2285004015 Gasoline 4-stroke railway maintenance equipment 

2285006015 LPG railway maintenance equipment 

4 
Table 2. Fraction of Hydro Power Units (22xx005050), Irrigation Sets (22xx005060), Generator 

Sets (22xx006005), Pumps (22xx006010), Compressors (22xx006015 and 

22xx006020), and Welders (22xx006025) Considered to be Mobile Sources 

Power Range (Hp) Percent Mobile 

Equipment 

0 to 25 90 

25 to 40 90 

40 to 100 70 

100 to 175 20 

175 to 300 15 

300 to 600 10 

600+ 0 

Small (<25 hp) Spark-Ignition Equipment 

Most small (<25 hp) spark-ignition engines fall under EPA regulations targeting mainly 

hydrocarbon emissions. (4,6,7) The regulations define new engine classes (I through V) based 

on use (handheld versus nonhandheld) and displacement, while the NONROAD model classifies 

engines by application and power level. For the purposes of inventory modeling, the five classes 

are defined by application and power level. Table 3 describes the definitions of engine class by 

application and power level that were used in the NONROAD model. 

The 1998 PSR population estimates were used for small (<25 hp) SI equipment, except 

for the following applications: lawn mowers, trimmers/edgers/brush cutters, 

leafblowers/vacuums, and chain saws. The methodology for calculating the base year 

populations for these four applications is described below. (Recreational equipment will be 

discussed in a separate section.) 

5 
Table 3. Small SI Engine Classes (<25 hp) by Application and Power Level 

SCC Description Power Range & 

Engine Cycle 

Engine Class 

22xx004020(1) 

22xx007005 

Chainsaws 0 to 1 hp 

(2 and 4-stroke) III 

1 to 3 hp 

(2 and 4-stroke) IV 

3 to 25 hp 

(2 and 4-stroke) V 

22xx002006 

22xx002039 

22xx004025(6) 

22xx004030(1) 

22xx004035(6) 

22xx004071 

Tampers and Rammers 

Concrete\Industrial Saws 

Trimmers\Edgers\Cutters 

Leaf blowers 

Snow blowers 

Commercial Turf 

0 to 1 hp 

(2 and 4-stroke) III 

1 to 3 hp 

(2 and 4-stroke) IV 

3 to 6 hp 

(2-stroke) V 

3 to 6 hp 

(4 stroke) I 

6 to 25 hp 

(2 and 4-stroke) II 

22xx004015(6) 

22xx005040 

All Others 

Tillers 

All Others 

0 to 1 hp 

(2 and 4-stroke) III 

1 to 3 hp 

(2 and 4-stroke) IV 

3 to 6 hp 

(2 and 4-stroke) I 

6 to 25 hp 

(2 and 4-stroke) II 

22xx001050 

22xx001060 

22xx002015 

22xx002024 

22xx002030 

22xx002033 

22xx002042 

22xx002072 

22xx002078 

22xx003050 

22xx004010 (1) 

22xx004040 (1) 

22xx004045 (6) 

22xx004050 (1) 

22xx007010 

22xx004055 (6) 

22xx004065 (6) 

22xx004075 (6) 

22xx005030 

22xx008005 

228500x015 

Golf Carts 

Specialty Carts 

Rollers 

Surfacing Equipment 

Trenchers 

Bore\Drill Rigs 

Cement\Motar Mixers 

Skid Steer Loaders 

Dumpers\Tenders 

Other Material Handling 

Lawnmower 

Rear Engine Riding Mower 

Front Mowers 

Shredders 

Lawn & Garden Tractors 

Chippers and Stump Grinders 

Other Lawn & Garden Equipment 

Agricultural Mowers 

Aircraft Support 

Railway Maintenance 

0 to 6 hp 

(2 and 4-stroke) I 

6 to 25 hp 

(2 and 4-stroke) II 

22xx004065(6) indicates that both 22xx004065 and 22xx004066 SCC are considered, for instance. 

6 
As of 1998, engines less than 25 hp used in gasoline-fueled nonroad equipment (such as 

lawn and garden equipment) were required to meet the first set of Federal emission standards, 

known as Phase 1 standards. Using sales estimates submitted to EPA by manufacturers of small 

nonroad engines as part of their Phase 1 certification, EPA estimated the total number of engines 

sold in 1998 in four of the highest sales volume small engine applications: lawn mowers, 

trimmers/edgers/brush cutters, leafblowers/vacuums, and chain saws. For 1993 and earlier 

years, EPA used sales estimates that had been submitted for those years by manufacturers during 

the development of EPA’s Phase 1 rulemaking. For the years 1994 to 1997, EPA linearly 

interpolated between the 1993 and 1998 sales estimates for each application. Using this year by 

year sales information and the expected scrappage of small nonroad equipment, EPA estimated 

the total 1996 calendar year population for the four applications noted above. In order to 

determine the power category specific populations, EPA relied on the fractions of engines in 

each engine class based on the certification sales estimates for all categories other than 

lawnmowers. For lawnmowers, nearly all of which were certified as Class I engines, EPA used 

the power category fractions in the PSR database. The resulting 1996 base year populations 

continue to be used in final NONROAD2008a. (8,9) 

Two important issues regarding small (<25 hp) SI engines and equipment require further 

discussion: treating commercial and residential users separately, and accounting for the effects 

of new regulations. 

Many of the small spark-ignited engines are used in lawn and garden equipment 

applications, and lawn and garden equipment is used both by commercial and residential users. 

The commercial users are grounds keepers for golf courses, nonresidential buildings, large 

apartment complexes, and some single-family homes. Commercial equipment therefore has 

significantly different usage than residential equipment in terms of hours per year as well as 

hours per weekday versus weekend day. To account for these differences in equipment usage, 

separate SCCs were defined to account for commercial and residential lawn and garden 

equipment. The 1998 PSR population estimates and the 1996 population estimates for the four 

lawn and garden applications described above were divided into residential and commercial 

fractions as shown in Table 4. For applications not shown in Table 4, 100% commercial use was 

assumed for the engines because these applications include such categories as construction, 

agricultural, commercial, and many other applications already considered commercial. 

From information derived by California (10), the sales fraction combined with the 

average life (in years of average operation shown in another report, NR-005d) of the engines was 

used to calculate an in-use population fraction of residential and commercial equipment. The 

calculation uses the sales fraction multiplied by the average life for both residential and 

commercial equipment and the population fraction determined from the two populations as 

shown in the equation below. 

Commercial Population Fraction = (Commercial Sales Fraction * Commercial Average Life in Years) / 

(Commercial Sales Fraction * Commercial Average Life + Residential Sales 

Fraction * Residential Average Life) 

7 
 

Table 4. Residential and Commercial Percentages of Small Spark-Ignition Engine Equipment 

SCC Application Hp 

Categories 

Residential 

% of Population 

Commercial 

% of Population 

22xx004010 

22xx004011 

Lawn mowers All 96.3 3.7 

22xx004025 

22xx004026 

Trimmers/edgers/cutters 0-1 hp 100 0 

1-3 hp 85.3 14.7 

>3 hp 0 100 

22xx004020 

22xx004021 

Chainsaws 0-1 hp 100 0 

1-3 hp 97.0 3.0 

>3 hp 0 100 

22xx004030 

22xx004031 

Leaf blowers/vacuums 0-1 hp 100 0 

1-3 hp 92.5 7.5 

>3 hp 0 100 

22xx004015 

22xx004016 

Tillers <6 hp All 85.7 14.3 

22xx004035 

22xx004036 

Snowblowers All 90.0 10.0 

22xx004071 Commercial turf equipment All 0.0 100.0 

22xx004040 

22xx004041 

Rear engine rider All 97.4 2.6 

22xx004055 

22xx004056 

Lawn and garden tractors All 97.4 2.6 

22xx004075 

22xx004076 

Other lawn and garden 

equipment 

All 45.7 54.3 

22xx004045 

22xx004046 

22xx004050 

22xx004051 

22xx004065 

22xx004066 

All others 

Front Mowers 

Shredders <6 hp 

Chippers\Stump Grinders 

All other equipment 

All 0.0 100.0 

8 
The above methodology was applied for all applications in Table 4 with the exception of 

trimmers/edgers/cutters, chain saws, and leafblowers/vacuums. Based on discussions with 

manufacturers during the Phase 2 rulemaking process, we believe that the residential/commercial 

split for these three applications is strongly dependent on engine class. We now classify all these 

 equipment powered by Class III two-stroke engines as residential. Equipment powered by Class 

IV two-stroke engines is now predominantly classified as residential. The Class IV split was 

estimated based on input from the three largest manufacturers of commercial equipment (i.e., 

ECHO, Stihl, and Husqvarna) and production estimates from all manufacturers of Class IV 

chainsaw engines. We now also classify the four-stroke engines over 6 hp as commercial 

equipment. (11) 

The regulations to be proposed require reduced emission rates in future years, and, 

among other consequences, are estimated to reduce the number of two-stroke engines sold in 

favor of four-stroke engines. With the current NONROAD modeling methodology, it was not 

possible to keep the 2-stroke and 4-stroke spark-ignition engines in separate SCCs in the 

emissions model and account for the shift of 2-stroke to 4-stroke engines. Therefore, sparkignition engines of less than 25 horsepower were lumped into one SCC category, eliminating the 

SCC distinction between 2 and 4-stroke gasoline, LPG, and CNG engines. The SCC description 

was changed to reflect the new engine classes described in Table 3. The distinction between 2 

and 4-stroke gasoline, LPG, and CNG engines will be maintained for sales fraction and emission 

rates by using technology groups within the SCC. 

One problem with lumping 2-stroke and 4-stroke engines together is that the different 

engine types have different conversion factors for converting total hydrocarbons (THC) to other 

hydrocarbon types (TOG, NMHC, NMOG, and VOC). This problem was ameliorated somewhat 

by defining the population to be primarily 2-stroke or primarily 4-stroke fuel types. In the base 

year, engine classes of III, IV, and V were primarily 2-stroke gasoline engines, so they were 

assigned SCCs of 2260xxxxxx. Engine classes I and II are primarily 4-stroke gasoline, therefore 

they were assigned SCCs of 2265xxxxxx. This means that 2-stroke hydrocarbon conversion 

factors were used for engine classes III, IV, and V, and 4-stroke conversion factors were used for 

engine classes I and II. 

Large Spark-Ignition Equipment 

The 1998 PSR population estimates were used for large SI equipment, with the exception 

of forklifts. We are using different population estimates for forklifts based on a recent market 

study. That study identified a 1996 population of 491,321 for Class 4 through 6 forklifts, which 

includes all forklifts powered by internal combustion engines. Approximately 80 percent of 

those were estimated to be fueled by propane, with the rest running on CNG, gasoline, or diesel 

fuel. Assuming diesel equipment makes up roughly half of these remaining forklifts leads to a 

total population of SI forklifts of 442,000. (12) Draft NONROAD2002a and later model 

versions therefore use this estimate for the 1996 base year SI forklift population. The 1998 PSR 

data was then used to subdivide the SI forklifts, such that propane accounts for about 85 percent, 

CNG about ten percent, and gasoline fueled equipment roughly five percent of the SI forklifts. 

9 
Analysis and assumptions regarding refueling methods was necessary in order to 

establish fuel type distributions in the absence of other data. Some applications of nonroad SI 

equipment face much different refueling situations. Lawn and garden equipment is usually not 

centrally fueled and therefore operates almost exclusively on gasoline, which is more readily 

available. Agriculture equipment is predominantly powered by diesel engines. Most of these 

operators likely have storage tanks for diesel fuel. For those who use spark-ignition engines in 

addition to, or instead of, the diesel models, we would expect them in many cases to be ready to 

invest in gasoline storage tanks as well, resulting in little or no use of LPG or natural gas for 

those applications. For construction, general industrial, and other equipment, there may be a mix 

of central and non-central fueling, and motive and portable equipment. We therefore believe that 

estimating an even mix of LPG and gasoline for these engines is most appropriate. The 

approximate distribution of fuel types for the individual applications used in the NONROAD 

model are listed in Table 5. It should be noted that the use of 100% LPG/CNG for large SI 

generators was based on recent sales and other market data. Due to the lack of such data for 

compressors and other large SI equipment, the 50% default value was used for these equipment 

types. 

10 
Table 5. Fuel Type Distribution for Various Large SI Applications 

Application Percent 

LPG/CNG Application Percent LPG/CNG 

Forklift* 95 Bore/drill rig 50 

Generator 100 Concrete/industrial saw 50 

Commercial turf 0 Rough terrain forklift 50 

Aerial lift 50 Other material handling 50 

Pump 50 Ag. tractor 0 

Welder 50 Paver 50 

Baler 0 Roller 50 

Air compressor 50 Other construction 50 

Scrubber/sweeper 50 Crane 50 

Chipper/grinder 50 Pressure washer 50 

Swathers 0 Paving equipment 50 

Leaf blower/vacuum 0 Aircraft support 50 

Sprayers 0 Gas compressor 100 

Specialty vehicle/cart 50 Front mowers 0 

Oil field equipment 100 Other lawn & garden 0 

Skid/steer loader 50 Tractor/loader/backhoe 50 

Other agriculture 

i t 

0 Hydraulic power unit 50 

Irrigation set 50 Surfacing equipment 50 

Trencher 50 Crushing/processing equip 50 

Rubber-tired loader 50 Refrigeration/AC 100 

Other general industrial 50 Railway maintenance 50 

Terminal tractor 50 Recreational marine 0 

* For forklifts the 95% is split roughly 85% LPG and 10% CNG. 

In a prior version of the model (draft NONROAD2004), populations in the 50-100 hp bin 

were entirely assigned to either the 50-75 hp bin or the 75-100 hp bin, depending on the average 

hp of the 50-100 hp bin. Since final NONROAD2005, these populations are distributed to the 

50-75 hp and 75-100 hp bins based on the PSR population data, and new population-based 

average hp estimates are calculated for each bin. This change should have little effect on 

emissions. 

Recreational Equipment 

Recreational equipment consists of snowmobiles, off-road motorcycles, all terrain 

vehicles (ATVs), golf carts, and specialty vehicle carts. The 1998 PSR population estimates 

were used for golf carts and non-diesel specialty vehicle carts. 

11 
The 1998 PSR population estimates were not used for snowmobiles, off-road 

motorcycles, ATVs, or diesel specialty vehicle carts. For snowmobiles, a study done by the Oak 

Ridge National Laboratory (ORNL) estimated the total snowmobile population for 1999 based 

on state registrations. They also developed a methodology for estimating the number of 

snowmobiles unregistered in each state, which works out to be approximately five percent of the 

total. Thus, they estimate a total snowmobile population of 1,567,000, which is used in final 

NONROAD2008a. (13) The International Snowmobile Manufacturers Association (ISMA) also 

estimated the total number of snowmobiles by summing the total number of registered 

snowmobiles in those states that require snowmobile registration. However, they did not 

estimate the number of unregistered snowmobiles. Therefore, we use the value presented by 

ORNL as the estimate of total snowmobiles. The distribution into hp categories was based on 

the hp category fractions in the PSR database. 

For off-road motorcycles, the only source is the Motorcycle Industry Council (MIC). 

MIC projects a total population for 1998 of 1,196,000 off-road motorcycles nationwide (13), 

which is used in final NONROAD2008a. Based on sales information, 67 percent are 2-stroke 

engines and 33 percent are 4-stroke engines. 

The population of ATVs used in final NONROAD2008a for the 1998 base year is 

3,910,000. This estimate comes from a 1998 Consumer Products Safety Commission study. (14) 

Populations of diesel specialty vehicle carts are estimated per the methodology presented 

below for compression-ignition equipment in general. 

Compression-Ignition (CI) Equipment 

Versions of NONROAD prior to NONROAD2005 used PSR’s population estimates 

directly. The PSR population estimates are derived using PSR’s estimates of equipment sales, 

load factor, activity, median life, and a default scrappage curve used to estimate the percent of 

equipment in operation with age. Since final NONROAD2005, however, the model incorporates 

a number of significant changes that affect the CI equipment inventory, including load factor and 

median life estimates. In order to maintain consistency between the revised inputs for load factor 

and activity used in the model and the load factor and activity inputs used to derive base year 

population estimates, the 1998 PSR diesel populations were not used. Instead, the latest 2003 

update of the PSR sales estimates through year 2000 (15) were used in conjunction with the 

latest input values for load factor, activity, median life and the default scrappage curve to 

calculate the 2000 base year populations for CI equipment. The 2000 populations are a sum of 

equipment in operation from model years 1950 through 2000, based on a backcast extrapolation 

of sales from 1973. 

12 
Recreational Marine Equipment 

The 2000 PSR population estimates were used for the base year of the recreational 

marine equipment category. Since final NONROAD2005, the power distribution of the 

population estimates for outboard and personal watercraft engines were reevaluated using the 

projected sales reported in the 1998-2004 model year certification data. This results in higher 

average rated power estimates for these categories compared to previous versions of the model. 

Similarly, for sterndrive/inboard engines, the available California certification data for 100-600 

hp engines were used to update the power distribution for these engines, since the manufacturers 

certifying in California make up more than 90 percent of sterndrive/inboard sales. This also 

results in higher average rated power estimates compared to versions prior to final 

NONROAD2005. 

Previous versions of NONROAD did not include high-performance SD/I marine engines. 

 Manufacturers have more recently commented that approximately 1,500 high-performance 

engines are produced in the U.S. per year. These engines range from 500 to 1500 horsepower 

and are used in both racing and non-racing applications. Based on conversations with individual 

high-performance engine manufacturers, we estimate that about two thirds of these engines are 

sold for use in the U.S., with an average power of about 650 horsepower. These engines are 

designed to sacrifice service life for power, but with rebuilds, generally are used for 7-8 years 

(we use 8 years for our modeling). Based on these estimates and the growth rate in the model, 

we estimate a 1998 population of SD/I engines over 600 horsepower of 7500 units. (16) 

The LPG and CNG recreational marine engine population values were estimated to be 

zero, which was confirmed with the PSR estimates. There were some diesel recreational marine 

engines not covered by the emissions regulations for spark-ignition marine engines and therefore 

not included in the recreational marine estimate just described. 

Recreational marine spark-ignition engines fall under EPA regulations targeting mainly 

hydrocarbon emissions. (17,18) The regulations require reduced emission rates and, among 

other consequences, are estimated to reduce the number of 2-stroke engines sold in favor of 4-

stroke engines. With the current NONROAD modeling methodology, it was not possible to keep 

the 2-stroke and 4-stroke spark-ignition engines in separate SCCs in the emissions model and 

account for the expected effects of the regulations. Therefore, spark-ignition engines are lumped 

into one SCC, which eliminates 2- and 4-stroke distinctions. 

As with small gasoline engines, one problem with lumping 2-stroke and 4-stroke 

recreational marine engines into a single SCC is that the different engine types have different 

conversion factors for converting total hydrocarbons (THC) to other hydrocarbon types (TOG, 

NMHC, NMOG, and VOC). This problem is ameliorated somewhat by defining the population 

to be primarily 2-stroke or primarily 4-stroke fuel types. For outboard (SCC 2282005010) and 

personal water craft (SCC 2282005015), the primary engine type in the base year is 2-stroke; for 

inboard engines (SCC 2282010005), the primary engine type in the base year is 4-stroke. The 

13 
NONROAD model uses these primary engine types as the basis for the conversion factors for 

these SCCs. 

As presented in Appendix A, three types of recreational marine equipment are 

differentiated: inboard, outboard, and personal water craft. The NEVES report documents three 

types of recreational applications; inboard, outboard, and sterndrive. Since sterndrive vessels 

use the same engines as inboard vessels, the EPA no longer considered the sterndrive category to 

be a unique application and eliminated it. Personal water craft, sometimes known by the brand 

name Jet SkiTM, were substituted into what was formerly the sterndrive category, and the SCC 

description was changed accordingly. 

Sailboat auxiliary propulsion engines are also included in the outboard and inboard 

engine categories. The national estimates include these engines, so NONROAD does not use 

this category to avoid double counting. PSR estimates that these engines only represent a small 

percentage of recreational marine engines. 

The population of diesel recreation marine engines provided in the default engine 

populations was derived from the PSR estimates and uses SCCs of 22820200xx. The ‘xx’ here 

denotes inboard as ‘05’, outboard as ‘10’, and sailboat auxiliary as ‘25.’ The categories of ‘15’ 

and ‘20’ were not used because sterndrive is no longer a separate category, and the sailboat 

auxiliary diesel engines were of a design providing low horsepower similar to that of outboard 

engines rather than inboard engines. There is little distinction between inboard and outboard for 

sailboat activity, allocations, or any other parameter, so assigning these sailboat auxiliary 

engines to outboard rather than inboard is a moot issue. 

Average Horsepower (Hp) Estimates 

As seen in Appendix A, the base year population estimates in NONROAD are provided 

by equipment type/hp category. In order to calculate an emissions inventory, the average hp 

corresponding to each equipment type/hp category is required. Final NONROAD2008a uses a 

sales-weighted average hp for each equipment type/hp category that was generated using 

information from PSR. For diesel equipment the average hp inputs come from the same 2003 

PSR sales information for 1990-2000 that was used for the engine population calculations. For 

SI equipment the average hp inputs come from the same 1998 PSR Partslink database from 

which most of the SI equipment populations were obtained. The resulting average hp estimates 

are also provided in Appendix A. 

14 
References 

(1) EPA, “Nonroad Engine and Vehicle Emission Study,” EPA-21A-2001, November, 1991. 

(2) E.H. Pechan, “Evaluation of Power Systems Research (PSR) Nonroad Population Data 

Base,” prepared for Office of Mobile Sources, U.S. Environmental Protection Agency, 

September 1997, EPA Contract No. 68-D3-0035, Work Assignment No. III-107, Pechan 

Report No. 97.09.003/1807. 

(3) Power Systems Research, “US Parts Link Edition 6.2,” St. Paul, MN. 1998 

(4) EPA, “Determination of Significance for Nonroad Sources and Emission Standards for 

New Nonroad Compression-Ignition Engines At or Above 37 kW; Final Rule,” 59 FR 

31306, June, 17, 1994. 

(5) Booz, Allen and Hamilton Inc., “Off-Road Mobile Equipment Emission Inventory,” 

January, 1992. 

(6)	 EPA, “Final Regulatory Impact Analysis, Phase 2: Emission Standards for New Nonroad 

Nonhandheld Spark-Ignition Engines At or Below 19 Kilowatts,” EPA420-R-99-003, 

March 1999. 

(7)	 EPA, “Final Regulatory Impact Analysis, Phase 2 Final Rule: Emission Standards for 

New Nonroad Handheld Spark-Ignition Engines At or Below 19 Kilowatts,” EPA420-R00-004, March 2000. 

(8)	 Harvey, Craig A., “U.S. EPA NONROAD Model Technical Report Addenda for Tier 2 

Rulemaking Version,” EPA420-R-99-008, March 24, 1999. 

(9)	 EPA, “Revised NONROAD Populations for Chainsaws Above 3 Horsepower,” Note 

from Phil Carlson to Craig Harvey, November 1, 2001. 

(10)	 California Air Resources Board, “Technical Support Document for California Exhaust 

Emission Standards and Test Procedures for 1994 and Subsequent Model-Year Utility 

and Lawn and Garden Equipment Engines,” Attachment C to CARB Mailout # 92-06, El 

Monte, CA. January 1992. 

(11)	 EPA, “Request for Revisions to the NONROAD Model Affecting Small Spark-Ignition 

Nonroad Handheld Engines,” Memorandum from Phil Carlson to Craig Harvey, 

December 10, 1999. 

(12)	 EPA, “Draft Regulatory Support Document: Control of Emissions from Unregulated 

Nonroad Engines,” EPA420-D-01-004, September 2001. 

(13)	 EPA, “Emission Modeling for Recreational Vehicles,” Memorandum from Linc Wehrly 

to Docket A-98-01, EPA420-F-00-051, November 13, 2000. 

(14)	 Consumer Products Safety Commission, April 1998, Part 1, “Report 1997 ATV Exposure 

Survey”, Bethesda, MD. 

(15)	 Power Systems Research, OELink (Sales) Database, May 2003updated version. 

(16)	 EPA, “Final Regulatory Impact Analysis, Final Rule: Control of Emissions from Marine 

SI and Small SI Engines, Vessels, and Equipment,” EPA420-R-08-014, September 2008. 

(17)	 EPA, “Regulatory Impact Analysis: Control of Air Pollution Emission Standards for 

New Spark-Ignition Marine Engines,” October, 1996. 

(18)	 EPA, “Control of Emissions From Nonroad Spark-Ignition Engines and Equipment; Final 

Rule,” 73 FR 59034, October 8, 2008. 

15 
Appendix A 

Base Year U.S. Population Estimates in Final NONROAD2008a*
 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1999 2260001020 2-Str Snowmobiles 1 3 2.5 6,297 

1999 2260001020 2-Str Snowmobiles 3 6 4 3,715 

1999 2260001020 2-Str Snowmobiles 11 16 15.66 3,989 

1999 2260001020 2-Str Snowmobiles 16 25 20.26 317,887 

1999 2260001020 2-Str Snowmobiles 25 40 32.86 320,869 

1999 2260001020 2-Str Snowmobiles 40 50 45.68 144,018 

1999 2260001020 2-Str Snowmobiles 50 75 58.48 507,374 

1999 2260001020 2-Str Snowmobiles 75 100 85.78 208,526 

1999 2260001020 2-Str Snowmobiles 100 175 112.4 54,325 

1998 2260001010 2-Str Offroad Motorcycles 0 1 1 801,320 

1998 2265001010 4-Str Offroad Motorcycles 0 1 1 394,680 

1998 2260001030 2-Str All Terrain Vehicles 0 1 1 405,000 

1998 2265001030 4-Str All Terrain Vehicles 0 1 1 3,505,000 

1998 2265001050 4-Str Golf Carts 6 11 9.15 175,537 

1998 2260001060 2-Str Specialty Vehicle Carts 6 11 8.046 326,568 

1998 2260001060 2-Str Specialty Vehicle Carts 25 40 37 97 

1998 2260001060 2-Str Specialty Vehicle Carts 50 75 55 55 

1998 2265001060 4-Str Specialty Vehicle Carts 1 3 3 165 

1998 2265001060 4-Str Specialty Vehicle Carts 3 6 4.424 6,706 

1998 2265001060 4-Str Specialty Vehicle Carts 11 16 15.99 12,701 

1998 2265001060 4-Str Specialty Vehicle Carts 16 25 19.62 100,050 

1998 2265001060 4-Str Specialty Vehicle Carts 25 40 30.55 1,023 

1998 2265001060 4-Str Specialty Vehicle Carts 40 50 46 25 

1998 2265001060 4-Str Specialty Vehicle Carts 50 75 61.48 2,469 

1998 2265001060 4-Str Specialty Vehicle Carts 75 100 86.5 20 

1998 2265001060 4-Str Specialty Vehicle Carts 100 175 118.3 935 

1998 2267001060 LPG - Specialty Vehicle Carts 25 40 30.55 1,023 

1998 2267001060 LPG - Specialty Vehicle Carts 40 50 46 25 

1998 2267001060 LPG - Specialty Vehicle Carts 50 75 61.48 2,469 

1998 2267001060 LPG - Specialty Vehicle Carts 75 100 86.5 20 

1998 2267001060 LPG - Specialty Vehicle Carts 100 175 118.3 935 

1998 2265002003 4-Str Pavers 3 6 5.35 746 

1998 2265002003 4-Str Pavers 6 11 9.328 5,198 

1998 2265002003 4-Str Pavers 11 16 12.56 241 

1998 2265002003 4-Str Pavers 16 25 20.85 1,883 

1998 2265002003 4-Str Pavers 25 40 31.75 318 

1998 2265002003 4-Str Pavers 50 75 62.41 351 

1998 2267002003 LPG - Pavers 25 40 31.75 318 

1998 2267002003 LPG - Pavers 50 75 62.41 351 

1998 2260002006 2-Str Tampers/Rammers 3 6 3.75 155,522 

1998 2265002006 4-Str Tampers/Rammers 6 11 7.518 340 

1998 2260002009 2-Str Plate Compactors 1 3 1.649 14,614 

1998 2265002009 4-Str Plate Compactors 3 6 4.409 74,153 

1998 2265002009 4-Str Plate Compactors 6 11 8.225 22,828 

1998 2265002009 4-Str Plate Compactors 11 16 12.67 4,046 

A1 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2265002015 4-Str Rollers 6 11 8.901 5,621 

1998 2265002015 4-Str Rollers 11 16 14.82 1,004 

1998 2265002015 4-Str Rollers 16 25 19.08 2,613 

1998 2265002015 4-Str Rollers 25 40 36.82 309 

1998 2265002015 4-Str Rollers 50 75 60.76 212 

1998 2265002015 4-Str Rollers 75 100 83 146 

1998 2267002015 LPG - Rollers 25 40 36.82 309 

1998 2267002015 LPG - Rollers 50 75 60.76 212 

1998 2267002015 LPG - Rollers 75 100 83 146 

1998 2260002021 2-Str Paving Equipment 1 3 1.823 13,997 

1998 2265002021 4-Str Paving Equipment 3 6 5.136 40,940 

1998 2265002021 4-Str Paving Equipment 6 11 8.535 34,719 

1998 2265002021 4-Str Paving Equipment 11 16 13.26 17,389 

1998 2265002021 4-Str Paving Equipment 16 25 20 12,251 

1998 2265002021 4-Str Paving Equipment 25 40 36.6 498 

1998 2265002021 4-Str Paving Equipment 50 75 66 45 

1998 2267002021 LPG - Paving Equipment 25 40 36.6 498 

1998 2267002021 LPG - Paving Equipment 50 75 66 45 

1998 2265002024 4-Str Surfacing Equipment 3 6 5.16 6,079 

1998 2265002024 4-Str Surfacing Equipment 6 11 8.918 9,362 

1998 2265002024 4-Str Surfacing Equipment 11 16 15.61 2,707 

1998 2265002024 4-Str Surfacing Equipment 16 25 19.05 1,141 

1998 2265002024 4-Str Surfacing Equipment 25 40 30.24 113 

1998 2265002024 4-Str Surfacing Equipment 50 75 66 41 

1998 2267002024 LPG - Surfacing Equipment 25 40 30.24 113 

1998 2267002024 LPG - Surfacing Equipment 50 75 66 41 

1998 2260002027 2-Str Signal Boards/Light Plants 1 3 2.2 38 

1998 2265002027 4-Str Signal Boards/Light Plants 3 6 5.032 687 

1998 2265002027 4-Str Signal Boards/Light Plants 6 11 8.25 684 

1998 2265002027 4-Str Signal Boards/Light Plants 16 25 18 26 

1998 2265002030 4-Str Trenchers 1 3 3 29 

1998 2265002030 4-Str Trenchers 3 6 5.211 10,643 

1998 2265002030 4-Str Trenchers 6 11 8.883 10,419 

1998 2265002030 4-Str Trenchers 11 16 13.44 3,723 

1998 2265002030 4-Str Trenchers 16 25 19.3 4,245 

1998 2265002030 4-Str Trenchers 25 40 30 707 

1998 2265002030 4-Str Trenchers 50 75 61.69 598 

1998 2265002030 4-Str Trenchers 75 100 80 470 

1998 2267002030 LPG - Trenchers 25 40 30 707 

1998 2267002030 LPG - Trenchers 50 75 61.69 598 

1998 2267002030 LPG - Trenchers 75 100 80 470 

1998 2265002033 4-Str Bore/Drill Rigs 0 1 0.9 4,390 

1998 2265002033 4-Str Bore/Drill Rigs 1 3 2.209 89,858 

1998 2265002033 4-Str Bore/Drill Rigs 3 6 4.809 3,634 

1998 2265002033 4-Str Bore/Drill Rigs 6 11 8.754 1,111 

1998 2265002033 4-Str Bore/Drill Rigs 11 16 16 1,410 

1998 2265002033 4-Str Bore/Drill Rigs 16 25 21.31 926 

1998 2265002033 4-Str Bore/Drill Rigs 25 40 31.39 373 

A2 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2265002033 4-Str Bore/Drill Rigs 50 75 61.34 340 

1998 2265002033 4-Str Bore/Drill Rigs 100 175 118.1 563 

1998 2267002033 LPG - Bore/Drill Rigs 25 40 31.39 373 

1998 2267002033 LPG - Bore/Drill Rigs 50 75 61.34 340 

1998 2267002033 LPG - Bore/Drill Rigs 100 175 118.1 563 

1998 2260002039 2-Str Concrete/Industrial Saws 1 3 1.897 11,491 

1998 2260002039 2-Str Concrete/Industrial Saws 3 6 4.532 55,066 

1998 2265002039 4-Str Concrete/Industrial Saws 6 11 8.535 28,313 

1998 2265002039 4-Str Concrete/Industrial Saws 11 16 14.68 5,937 

1998 2265002039 4-Str Concrete/Industrial Saws 16 25 19.41 2,610 

1998 2265002039 4-Str Concrete/Industrial Saws 25 40 34.79 718 

1998 2265002039 4-Str Concrete/Industrial Saws 50 75 65.78 391 

1998 2267002039 LPG - Concrete/Industrial Saws 25 40 34.79 718 

1998 2267002039 LPG - Concrete/Industrial Saws 50 75 65.78 391 

1998 2265002042 4-Str Cement & Mortar Mixers 1 3 2.89 1,558 

1998 2265002042 4-Str Cement & Mortar Mixers 3 6 5.22 87,327 

1998 2265002042 4-Str Cement & Mortar Mixers 6 11 8.373 145,895 

1998 2265002042 4-Str Cement & Mortar Mixers 11 16 13.52 4,950 

1998 2265002042 4-Str Cement & Mortar Mixers 16 25 17.87 3,793 

1998 2265002045 4-Str Cranes 6 11 8 148 

1998 2265002045 4-Str Cranes 11 16 14.02 209 

1998 2265002045 4-Str Cranes 16 25 18.16 74 

1998 2265002045 4-Str Cranes 25 40 37 3 

1998 2265002045 4-Str Cranes 50 75 69.04 520 

1998 2265002045 4-Str Cranes 100 175 115.2 84 

1998 2267002045 LPG - Cranes 25 40 37 3 

1998 2267002045 LPG - Cranes 50 75 69.04 520 

1998 2267002045 LPG - Cranes 100 175 115.2 84 

1998 2260002054 2-Str Crushing/Proc. Equipment 1 3 1.8 1,405 

1998 2265002054 4-Str Crushing/Proc. Equipment 3 6 4.321 1,975 

1998 2265002054 4-Str Crushing/Proc. Equipment 6 11 8.93 3,603 

1998 2265002054 4-Str Crushing/Proc. Equipment 11 16 16 924 

1998 2265002054 4-Str Crushing/Proc. Equipment 50 75 62.53 115 

1998 2267002054 LPG - Crushing/Proc. Equipment 50 75 62.53 115 

1998 2265002057 4-Str Rough Terrain Forklift 16 25 23 33 

1998 2265002057 4-Str Rough Terrain Forklift 25 40 29 112 

1998 2265002057 4-Str Rough Terrain Forklift 40 50 46 1 

1998 2265002057 4-Str Rough Terrain Forklift 50 75 65.9 738 

1998 2265002057 4-Str Rough Terrain Forklift 75 100 80 5 

1998 2265002057 4-Str Rough Terrain Forklift 100 175 113.3 87 

1998 2267002057 LPG - Rough Terrain Forklift 25 40 29 112 

1998 2267002057 LPG - Rough Terrain Forklift 40 50 46 1 

1998 2267002057 LPG - Rough Terrain Forklift 50 75 65.9 738 

1998 2267002057 LPG - Rough Terrain Forklift 75 100 80 5 

1998 2267002057 LPG - Rough Terrain Forklift 100 175 113.3 87 

1998 2265002060 4-Str Rubber Tire Loaders 25 40 37 32 

1998 2265002060 4-Str Rubber Tire Loaders 50 75 70.4 1,474 

1998 2265002060 4-Str Rubber Tire Loaders 100 175 113.0 49 

A3 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2267002060 LPG - Rubber Tire Loaders 25 40 37 32 

1998 2267002060 LPG - Rubber Tire Loaders 50 75 70.4 1,474 

1998 2267002060 LPG - Rubber Tire Loaders 100 175 113 49 

1998 2265002066 4-Str Tractors/Loaders/Backhoes 6 11 10.8 362 

1998 2265002066 4-Str Tractors/Loaders/Backhoes 16 25 19.08 7,534 

1998 2265002066 4-Str Tractors/Loaders/Backhoes 25 40 30 28 

1998 2265002066 4-Str Tractors/Loaders/Backhoes 50 75 61 132 

1998 2265002066 4-Str Tractors/Loaders/Backhoes 75 100 80 16 

1998 2267002066 LPG - Tractors/Loaders/Backhoes 25 40 30 28 

1998 2267002066 LPG - Tractors/Loaders/Backhoes 50 75 61 132 

1998 2267002066 LPG - Tractors/Loaders/Backhoes 75 100 80 16 

1998 2265002072 4-Str Skid Steer Loaders 11 16 15.93 297 

1998 2265002072 4-Str Skid Steer Loaders 16 25 18.41 5,986 

1998 2265002072 4-Str Skid Steer Loaders 25 40 31.93 1,698 

1998 2265002072 4-Str Skid Steer Loaders 50 75 54.44 938 

1998 2265002072 4-Str Skid Steer Loaders 75 100 79 1,003 

1998 2267002072 LPG - Skid Steer Loaders 25 40 31.93 1,698 

1998 2267002072 LPG - Skid Steer Loaders 50 75 54.58 938 

1998 2267002072 LPG - Skid Steer Loaders 75 100 79 1,003 

1998 2265002078 4-Str Dumpers/Tenders 3 6 4.96 5,279 

1998 2265002078 4-Str Dumpers/Tenders 6 11 8.52 17,418 

1998 2265002078 4-Str Dumpers/Tenders 11 16 12.28 2,622 

1998 2265002078 4-Str Dumpers/Tenders 16 25 18.74 3,202 

1998 2265002078 4-Str Dumpers/Tenders 50 75 66 124 

1998 2265002081 4-Str Other Construction Equipment 16 25 18 20 

1998 2265002081 4-Str Other Construction Equipment 100 175 126 625 

1998 2267002081 LPG - Other Construction Equipment 100 175 126 597 

1998 2268002081 CNG - Other Construction Equipment 100 175 105 28 

1998 2265003010 4-Str Aerial Lifts 6 11 8.075 2,188 

1998 2265003010 4-Str Aerial Lifts 11 16 14.39 608 

1998 2265003010 4-Str Aerial Lifts 16 25 21.13 14,037 

1998 2265003010 4-Str Aerial Lifts 25 40 31.22 6,208 

1998 2265003010 4-Str Aerial Lifts 50 75 59.86 12,931 

1998 2265003010 4-Str Aerial Lifts 100 175 111.5 287 

1998 2267003010 LPG - Aerial Lifts 25 40 31.22 6,208 

1998 2267003010 LPG - Aerial Lifts 50 75 59.88 12,931 

1998 2267003010 LPG - Aerial Lifts 100 175 111.5 287 

1996 2265003020 4-Str Forklifts 25 40 36.12 1,645 

1996 2265003020 4-Str Forklifts 40 50 45.16 5,876 

1996 2265003020 4-Str Forklifts 50 75 62.77 9,466 

1996 2265003020 4-Str Forklifts 75 100 89.03 691 

1996 2265003020 4-Str Forklifts 100 175 144.7 4,399 

1996 2265003020 4-Str Forklifts 175 300 215.8 22 

1996 2267003020 LPG - Forklifts 25 40 33.44 31,264 

1996 2267003020 LPG - Forklifts 40 50 45.43 68,337 

1996 2267003020 LPG - Forklifts 50 75 58.18 179,857 

1996 2267003020 LPG - Forklifts 75 100 79.83 13,136 

1996 2267003020 LPG - Forklifts 100 175 131.5 83,590 

A4 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1996 2267003020 LPG - Forklifts 175 300 215.8 409 

1996 2268003020 CNG - Forklifts 40 50 48 43,307 

1998 2260003030 2-Str Sweepers/Scrubbers 1 3 1.276 3,298 

1998 2265003030 4-Str Sweepers/Scrubbers 3 6 4.735 3,777 

1998 2265003030 4-Str Sweepers/Scrubbers 6 11 9.855 5,779 

1998 2265003030 4-Str Sweepers/Scrubbers 11 16 14.85 1,563 

1998 2265003030 4-Str Sweepers/Scrubbers 16 25 18.23 3,348 

1998 2265003030 4-Str Sweepers/Scrubbers 25 40 31.91 2,011 

1998 2265003030 4-Str Sweepers/Scrubbers 40 50 46 2,273 

1998 2265003030 4-Str Sweepers/Scrubbers 50 75 63.35 2,306 

1998 2265003030 4-Str Sweepers/Scrubbers 75 100 90 23 

1998 2265003030 4-Str Sweepers/Scrubbers 100 175 150.0 47 

1998 2265003030 4-Str Sweepers/Scrubbers 300 600 411.0 3 

1998 2267003030 LPG - Sweepers/Scrubbers 25 40 31 2,011 

1998 2267003030 LPG - Sweepers/Scrubbers 40 50 47 2,273 

1998 2267003030 LPG - Sweepers/Scrubbers 50 75 63.35 2,306 

1998 2267003030 LPG - Sweepers/Scrubbers 75 100 90 23 

1998 2267003030 LPG - Sweepers/Scrubbers 100 175 150 47 

1998 2267003030 LPG - Sweepers/Scrubbers 300 600 411 3 

1998 2268003030 CNG - Sweepers/Scrubbers 175 300 190 20 

1998 2260003040 2-Str Other General Industrial Eqp 1 3 2.044 156 

1998 2265003040 4-Str Other General Industrial Eqp 3 6 4.289 63,996 

1998 2265003040 4-Str Other General Industrial Eqp 6 11 9.063 12,092 

1998 2265003040 4-Str Other General Industrial Eqp 11 16 13.53 6,158 

1998 2265003040 4-Str Other General Industrial Eqp 16 25 18.24 5,205 

1998 2265003040 4-Str Other General Industrial Eqp 25 40 30.12 465 

1998 2265003040 4-Str Other General Industrial Eqp 50 75 60.96 646 

1998 2265003040 4-Str Other General Industrial Eqp 75 100 80 104 

1998 2265003040 4-Str Other General Industrial Eqp 100 175 136 246 

1998 2265003040 4-Str Other General Industrial Eqp 175 300 195 9 

1998 2267003040 LPG - Other General Industrial Eqp 25 40 30.12 465 

1998 2267003040 LPG - Other General Industrial Eqp 50 75 60.96 646 

1998 2267003040 LPG - Other General Industrial Eqp 75 100 80 80 

1998 2267003040 LPG - Other General Industrial Eqp 100 175 136 246 

1998 2267003040 LPG - Other General Industrial Eqp 175 300 195 9 

1998 2268003040 CNG - Other General Industrial Eqp 75 100 98.5 24 

1998 2265003050 4-Str Other Material Handling Eqp 1 3 3 33 

1998 2265003050 4-Str Other Material Handling Eqp 16 25 18.12 1,271 

1998 2265003050 4-Str Other Material Handling Eqp 50 75 63.00 773 

1998 2265003050 4-Str Other Material Handling Eqp 75 100 86.00 29 

1998 2267003050 LPG - Other Material Handling Eqp 50 75 53.6 773 

1998 2267003050 LPG - Other Material Handling Eqp 75 100 86.0 29 

1998 2265003060 4-Str AC\Refrigeration 6 11 9.0 22 

1998 2265003060 4-Str AC\Refrigeration 11 16 13.0 35 

1998 2265003060 4-Str AC\Refrigeration 16 25 18.0 1,067 

1998 2268003060 CNG - AC\Refrigeration 40 50 48 120 

1998 2268003060 CNG - AC\Refrigeration 50 75 74 41 

1998 2265003070 4-Str Terminal Tractors 25 40 35 11 

A5 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2265003070 4-Str Terminal Tractors 50 75 58.19 411 

1998 2265003070 4-Str Terminal Tractors 75 100 98.62 188 

1998 2265003070 4-Str Terminal Tractors 100 175 114.2 739 

1998 2265003070 4-Str Terminal Tractors 175 300 250 9 

1998 2267003070 LPG - Terminal Tractors 25 40 35 11 

1998 2267003070 LPG - Terminal Tractors 50 75 57 388 

1998 2267003070 LPG - Terminal Tractors 75 100 97 147 

1998 2267003070 LPG - Terminal Tractors 100 175 104 730 

1998 2267003070 LPG - Terminal Tractors 175 300 190 0 

1998 2268003070 CNG - Terminal Tractors 50 75 62 23 

1998 2268003070 CNG - Terminal Tractors 75 100 94 41 

1998 2268003070 CNG - Terminal Tractors 100 175 125 9 

1998 2268003070 CNG - Terminal Tractors 175 300 250 9 

1996 2265004010 4-Str Lawn mowers (res) 1 3 2.55 636,892 

1996 2265004010 4-Str Lawn mowers (res) 3 6 4.1 31,652,672 

1996 2265004010 4-Str Lawn mowers (res) 6 11 6.24 10,436 

1996 2265004011 4-Str Lawn mowers (Com) 1 3 2.55 29,577 

1996 2265004011 4-Str Lawn mowers (Com) 3 6 4.1 1,469,938 

1996 2265004011 4-Str Lawn mowers (Com) 6 11 6.24 485 

1998 2260004015 2-Str Rotary Tillers < 6 HP (res) 0 1 0.957 59,060 

1998 2260004015 2-Str Rotary Tillers < 6 HP (res) 1 3 2.514 417,521 

1998 2265004015 4-Str Rotary Tillers < 6 HP (res) 3 6 4.712 2,965,010 

1998 2260004016 2-Str Rotary Tillers < 6 HP (com) 0 1 0.957 9,855 

1998 2260004016 2-Str Rotary Tillers < 6 HP (com) 1 3 2.514 69,668 

1998 2265004016 4-Str Rotary Tillers < 6 HP (com) 3 6 4.712 494,745 

1996 2260004020 2-Str Chain Saws < 6 HP (res) 1 3 2.11 5,150,700 

1996 2260004020 2-Str Chain Saws < 6 HP (res) 3 6 3.916 0 

1996 2260004021 2-Str Chain Saws < 6 HP (com) 1 3 2.11 159,300 

1996 2260004021 2-Str Chain Saws < 6 HP (com) 3 6 3.916 560,500 

1996 2260004025 2-Str Trimmers/Edgers/Brush Cutter (res) 0 1 0.81 3,850,000 

1996 2260004025 2-Str Trimmers/Edgers/Brush Cutter (res) 1 3 1.4 9,750,000 

1996 2260004025 2-Str Trimmers/Edgers/Brush Cutter (res) 3 6 3.3 0 

1996 2260004026 2-Str Trimmers/Edgers/Brush Cutter (com) 0 1 0.81 0 

1996 2260004026 2-Str Trimmers/Edgers/Brush Cutter (com) 1 3 1.4 1,680,650 

1996 2260004026 2-Str Trimmers/Edgers/Brush Cutter (com) 3 6 3.30 119,350 

1996 2265004025 4-Str Trimmers/Edgers/Brush Cutter (res) 3 6 3.3 222,344 

1996 2265004025 4-Str Trimmers/Edgers/Brush Cutter (res) 6 11 7.9 0 

1996 2265004025 4-Str Trimmers/Edgers/Brush Cutter (res) 11 16 16 0 

1996 2265004025 4-Str Trimmers/Edgers/Brush Cutter (res) 16 25 18.00 0 

1996 2265004026 4-Str Trimmers/Edgers/Brush Cutter (com) 3 6 3.3 26,363 

1996 2265004026 4-Str Trimmers/Edgers/Brush Cutter (com) 6 11 7.9 7,052 

1996 2265004026 4-Str Trimmers/Edgers/Brush Cutter (com) 11 16 16 373 

1996 2265004026 4-Str Trimmers/Edgers/Brush Cutter (com) 16 25 18 809 

1996 2260004030 2-Str Leafblowers/Vacuums (res) 0 1 0.84 570,000 

1996 2260004030 2-Str Leafblowers/Vacuums (res) 1 3 1.41 6,330,000 

1996 2260004030 2-Str Leafblowers/Vacuums (res) 3 6 3.42 0 

1996 2260004031 2-Str Leafblowers/Vacuums (com) 0 1 0.84 0 

1996 2260004031 2-Str Leafblowers/Vacuums (com) 1 3 1.41 510,000 

A6 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1996 2260004031 2-Str Leafblowers/Vacuums (com) 3 6 3.42 190,000 

1996 2265004030 4-Str Leafblowers/Vacuums (res) 3 6 3.4 358,692 

1996 2265004030 4-Str Leafblowers/Vacuums (res) 6 11 8.3 0 

1996 2265004030 4-Str Leafblowers/Vacuums (res) 11 16 14.23 0 

1996 2265004030 4-Str Leafblowers/Vacuums (res) 16 25 20.96 0 

1996 2265004031 4-Str Leafblowers/Vacuums (com) 3 6 3.4 29,083 

1996 2265004031 4-Str Leafblowers/Vacuums (com) 6 11 8.3 284,431 

1996 2265004031 4-Str Leafblowers/Vacuums (com) 11 16 14.2 8,959 

1996 2265004031 4-Str Leafblowers/Vacuums (com) 16 25 21.0 9,747 

1996 2265004031 4-Str Leafblowers/Vacuums (com) 25 40 31 742 

1996 2265004031 4-Str Leafblowers/Vacuums (com) 50 75 61.21 5,061 

1996 2265004031 4-Str Leafblowers/Vacuums (com) 100 175 120.8 5,020 

1998 2260004035 2-Str Snowblowers (res) 1 3 2.921 966,993 

1998 2260004035 2-Str Snowblowers (res) 3 6 4.686 1,480,768 

1998 2265004035 4-Str Snowblowers (res) 6 11 8.699 2,498,136 

1998 2265004035 4-Str Snowblowers (res) 11 16 12.59 116,759 

1998 2260004036 2-Str Snowblowers (com) 1 3 2.921 107,444 

1998 2260004036 2-Str Snowblowers (com) 3 6 4.686 164,530 

1998 2265004036 4-Str Snowblowers (com) 6 11 8.699 277,571 

1998 2265004036 4-Str Snowblowers (com) 11 16 12.59 12,973 

1998 2265004040 4-Str Rear Engine Riding Mowers (res) 3 6 5.105 6,954 

1998 2265004040 4-Str Rear Engine Riding Mowers (res) 6 11 9.153 1,006,160 

1998 2265004040 4-Str Rear Engine Riding Mowers (res) 11 16 12.61 780,271 

1998 2265004040 4-Str Rear Engine Riding Mowers (res) 16 25 18.26 3,691 

1998 2265004041 4-Str Rear Engine Riding Mowers (com) 3 6 5.105 186 

1998 2265004041 4-Str Rear Engine Riding Mowers (com) 6 11 9.153 26,858 

1998 2265004041 4-Str Rear Engine Riding Mowers (com) 11 16 12.61 20,829 

1998 2265004041 4-Str Rear Engine Riding Mowers (com) 16 25 18.26 99 

1998 2265004046 4-Str Front Mowers (com) 6 11 8 27,794 

1998 2265004046 4-Str Front Mowers (com) 11 16 13.47 94,937 

1998 2265004046 4-Str Front Mowers (com) 16 25 17 41,976 

1998 2265004046 4-Str Front Mowers (com) 25 40 32.27 630 

1998 2265004051 4-Str Shredders < 6 HP (com) 1 3 2.986 101,841 

1998 2265004051 4-Str Shredders < 6 HP (com) 3 6 4.835 199,316 

1998 2265004055 4-Str Lawn & Garden Tractors (res) 3 6 5.002 24,846 

1998 2265004055 4-Str Lawn & Garden Tractors (res) 6 11 9.735 778,998 

1998 2265004055 4-Str Lawn & Garden Tractors (res) 11 16 13.61 8,655,718 

1998 2265004055 4-Str Lawn & Garden Tractors (res) 16 25 18.41 2,821,097 

1998 2265004056 4-Str Lawn & Garden Tractors (com) 3 6 5.002 663 

1998 2265004056 4-Str Lawn & Garden Tractors (com) 6 11 9.735 20,795 

1998 2265004056 4-Str Lawn & Garden Tractors (com) 11 16 13.61 231,056 

1998 2265004056 4-Str Lawn & Garden Tractors (com) 16 25 18.41 75,306 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 3 6 3.5 34 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 6 11 9.791 1,678 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 11 16 15.32 6,916 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 16 25 20.05 13,034 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 25 40 35.1 984 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 50 75 60.77 4,199 

A7 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 75 100 80 39 

1998 2265004066 4-Str Chippers/Stump Grinders (com) 100 175 119 1,005 

1998 2267004066 LPG - Chippers/Stump Grinders (com) 25 40 35.1 984 

1998 2267004066 LPG - Chippers/Stump Grinders (com) 50 75 60.77 4,199 

1998 2267004066 LPG - Chippers/Stump Grinders (com) 75 100 80 39 

1998 2267004066 LPG - Chippers/Stump Grinders (com) 100 175 119 1,005 

1998 2260004071 2-Str Commercial Turf Equipment (com) 1 3 3 119 

1998 2265004071 4-Str Commercial Turf Equipment (com) 3 6 5.217 343,058 

1998 2265004071 4-Str Commercial Turf Equipment (com) 6 11 8.771 91,253 

1998 2265004071 4-Str Commercial Turf Equipment (com) 11 16 13.99 203,640 

1998 2265004071 4-Str Commercial Turf Equipment (com) 16 25 19.33 265,433 

1998 2265004071 4-Str Commercial Turf Equipment (com) 25 40 27.24 52,592 

1998 2265004071 4-Str Commercial Turf Equipment (com) 50 75 59.59 454 

1998 2265004075 4-Str Other Lawn & Garden Eqp. (res) 0 1 0.914 25,378 

1998 2265004075 4-Str Other Lawn & Garden Eqp. (res) 1 3 2.34 109,896 

1998 2265004075 4-Str Other Lawn & Garden Eqp. (res) 3 6 4.867 280,075 

1998 2265004075 4-Str Other Lawn & Garden Eqp. (res) 6 11 8.208 185,063 

1998 2265004075 4-Str Other Lawn & Garden Eqp. (res) 11 16 15.54 2,710 

1998 2265004075 4-Str Other Lawn & Garden Eqp. (res) 16 25 20.04 1,776 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 0 1 0.914 30,154 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 1 3 2.34 130,577 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 3 6 4.867 332,781 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 6 11 8.208 219,889 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 11 16 15.54 3,220 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 16 25 20.04 2,111 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 25 40 36.04 206 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 50 75 66.00 71 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 75 100 86.00 25 

1998 2265004076 4-Str Other Lawn & Garden Eqp. (com) 100 175 113 83 

1998 2265005010 4-Str 2-Wheel Tractors 6 11 8.197 2,595 

1998 2265005010 4-Str 2-Wheel Tractors 11 16 14.19 2,239 

1998 2265005015 4-Str Agricultural Tractors 16 25 20.4 1,075 

1998 2265005015 4-Str Agricultural Tractors 25 40 30.5 111 

1998 2265005015 4-Str Agricultural Tractors 75 100 82.13 1,286 

1998 2265005015 4-Str Agricultural Tractors 100 175 125 145 

1998 2265005020 4-Str Combines 50 75 60 1 

1998 2265005020 4-Str Combines 75 100 90 9 

1998 2265005020 4-Str Combines 100 175 141.2 20 

1998 2265005025 4-Str Balers 25 40 34.57 13,265 

1998 2265005025 4-Str Balers 50 75 65.28 4,246 

1998 2265005025 4-Str Balers 100 175 113 482 

1998 2265005030 4-Str Agricultural Mowers 3 6 6 88 

1998 2265005030 4-Str Agricultural Mowers 6 11 9.206 6,148 

1998 2265005030 4-Str Agricultural Mowers 11 16 16 90 

1998 2265005030 4-Str Agricultural Mowers 16 25 18 1,880 

1998 2260005035 2-Str Sprayers 0 1 0.88 22,521 

1998 2260005035 2-Str Sprayers 1 3 2.567 20,997 

1998 2265005035 4-Str Sprayers 3 6 4.37 81,764 

A8 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2265005035 4-Str Sprayers 6 11 8.204 29,819 

1998 2265005035 4-Str Sprayers 11 16 14.85 10,243 

1998 2265005035 4-Str Sprayers 16 25 20.51 17,354 

1998 2265005035 4-Str Sprayers 25 40 33.28 4,227 

1998 2265005035 4-Str Sprayers 50 75 62 1,586 

1998 2265005035 4-Str Sprayers 75 100 89.87 1,661 

1998 2265005035 4-Str Sprayers 100 175 130.3 1,630 

1998 2265005040 4-Str Tillers > 6 HP 6 11 7.501 719,032 

1998 2265005040 4-Str Tillers > 6 HP 11 16 14.76 1,796 

1998 2265005045 4-Str Swathers 75 100 80 7,168 

1998 2265005045 4-Str Swathers 100 175 121.9 4,061 

1998 2265005055 4-Str Other Agricultural Equipment 3 6 4.84 1,544 

1998 2265005055 4-Str Other Agricultural Equipment 6 11 9.14 7,506 

1998 2265005055 4-Str Other Agricultural Equipment 11 16 14.11 4,462 

1998 2265005055 4-Str Other Agricultural Equipment 16 25 18.64 3,953 

1998 2265005055 4-Str Other Agricultural Equipment 25 40 32.23 314 

1998 2265005055 4-Str Other Agricultural Equipment 50 75 62.38 508 

1998 2265005055 4-Str Other Agricultural Equipment 75 100 88.04 81 

1998 2265005055 4-Str Other Agricultural Equipment 100 175 167.4 2,977 

1998 2265005055 4-Str Other Agricultural Equipment 175 300 230.1 1,244 

1998 2267005055 LPG - Other Agricultural Equipment 100 175 154 80 

1998 2268005055 CNG - Other Agricultural Equipment 100 175 148 134 

1998 2265005060 4-Str Irrigation Sets 3 6 4.692 761 

1998 2265005060 4-Str Irrigation Sets 6 11 8.918 209 

1998 2265005060 4-Str Irrigation Sets 16 25 18 3 

1998 2265005060 4-Str Irrigation Sets 50 75 59.7 477 

1998 2265005060 4-Str Irrigation Sets 75 100 80.25 1,007 

1998 2265005060 4-Str Irrigation Sets 100 175 120.5 467 

1998 2265005060 4-Str Irrigation Sets 175 300 210.2 213 

1998 2267005060 LPG - Irrigation Sets 100 175 113 12 

1998 2268005060 CNG - Irrigation Sets 25 40 32 248 

1998 2268005060 CNG - Irrigation Sets 50 75 72.78 1,314 

1998 2268005060 CNG - Irrigation Sets 75 100 96.19 1,869 

1998 2268005060 CNG - Irrigation Sets 100 175 138.9 184 

1998 2268005060 CNG - Irrigation Sets 175 300 233.3 214 

1998 2268005060 CNG - Irrigation Sets 300 600 384.4 44 

1998 2260006005 2-Str Generator Sets 0 1 0.8 4,052 

1998 2260006005 2-Str Generator Sets 1 3 1.663 100,577 

1998 2265006005 4-Str Generator Sets 3 6 4.567 707,572 

1998 2265006005 4-Str Generator Sets 6 11 8.816 1,699,093 

1998 2265006005 4-Str Generator Sets 11 16 14.34 375,830 

1998 2265006005 4-Str Generator Sets 16 25 20.72 537,782 

1998 2265006005 4-Str Generator Sets 25 40 30.32 0 

1998 2265006005 4-Str Generator Sets 40 50 45.99 0 

1998 2265006005 4-Str Generator Sets 50 75 59.5 0 

1998 2265006005 4-Str Generator Sets 75 100 81.28 0 

1998 2265006005 4-Str Generator Sets 100 175 138.5 0 

1998 2265006005 4-Str Generator Sets 175 300 212.6 0 

A9 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2267006005 LPG - Generator Sets 25 40 30.32 49,803 

1998 2267006005 LPG - Generator Sets 40 50 45.99 374 

1998 2267006005 LPG - Generator Sets 50 75 62.91 23,229 

1998 2267006005 LPG - Generator Sets 75 100 81.28 20,659 

1998 2267006005 LPG - Generator Sets 100 175 138.8 7,750 

1998 2267006005 LPG - Generator Sets 175 300 239.6 179 

1998 2267006005 LPG - Generator Sets 300 600 372 30 

1998 2268006005 CNG - Generator Sets 25 40 31.73 471 

1998 2268006005 CNG - Generator Sets 40 50 47.67 797 

1998 2268006005 CNG - Generator Sets 50 75 60.44 15,915 

1998 2268006005 CNG - Generator Sets 75 100 95.41 5,356 

1998 2268006005 CNG - Generator Sets 100 175 147.8 1,849 

1998 2268006005 CNG - Generator Sets 175 300 239.8 756 

1998 2268006005 CNG - Generator Sets 300 600 392.6 382 

1998 2260006010 2-Str Pumps 0 1 0.991 127,359 

1998 2260006010 2-Str Pumps 1 3 1.998 230,103 

1998 2260006010 2-Str Pumps 25 40 38 140 

1998 2260006010 2-Str Pumps 50 75 55 29 

1998 2265006010 4-Str Pumps 3 6 4.631 329,762 

1998 2265006010 4-Str Pumps 6 11 8.337 206,833 

1998 2265006010 4-Str Pumps 11 16 14.81 20,034 

1998 2265006010 4-Str Pumps 16 25 18.35 11,674 

1998 2265006010 4-Str Pumps 25 40 31.95 10,150 

1998 2265006010 4-Str Pumps 40 50 46 94 

1998 2265006010 4-Str Pumps 50 75 60.6 4,723 

1998 2265006010 4-Str Pumps 75 100 81.25 314 

1998 2265006010 4-Str Pumps 100 175 115.3 728 

1998 2267006010 LPG - Pumps 25 40 31.95 9,817 

1998 2267006010 LPG - Pumps 40 50 46 94 

1998 2267006010 LPG - Pumps 50 75 57 4,719 

1998 2267006010 LPG - Pumps 75 100 81.25 314 

1998 2267006010 LPG - Pumps 100 175 115.3 682 

1998 2268006010 CNG - Pumps 25 40 32 333 

1998 2268006010 CNG - Pumps 50 75 52 4 

1998 2268006010 CNG - Pumps 100 175 175 46 

1998 2268006010 CNG - Pumps 175 300 246 53 

1998 2268006010 CNG - Pumps 300 600 423.3 55 

1998 2260006015 2-Str Air Compressors 1 3 2.209 59 

1998 2265006015 4-Str Air Compressors 3 6 5.188 52,263 

1998 2265006015 4-Str Air Compressors 6 11 9.925 48,785 

1998 2265006015 4-Str Air Compressors 11 16 13.63 5,984 

1998 2265006015 4-Str Air Compressors 16 25 18.67 6,485 

1998 2265006015 4-Str Air Compressors 25 40 31.67 950 

1998 2265006015 4-Str Air Compressors 50 75 60.73 5,253 

1998 2265006015 4-Str Air Compressors 75 100 81.69 1,118 

1998 2265006015 4-Str Air Compressors 100 175 131.9 524 

1998 2267006015 LPG - Air Compressors 25 40 31.67 950 

1998 2267006015 LPG - Air Compressors 50 75 60.73 5,102 

A10 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2267006015 LPG - Air Compressors 75 100 81.69 1,118 

1998 2267006015 LPG - Air Compressors 100 175 131.9 280 

1998 2268006015 CNG - Air Compressors 50 75 52 151 

1998 2268006015 CNG - Air Compressors 100 175 148 244 

1998 2268006020 CNG - Gas Compressors 25 40 27.5 155 

1998 2268006020 CNG - Gas Compressors 40 50 45.24 92 

1998 2268006020 CNG - Gas Compressors 50 75 69 25 

1998 2268006020 CNG - Gas Compressors 75 100 91.2 271 

1998 2268006020 CNG - Gas Compressors 100 175 145.9 45 

1998 2268006020 CNG - Gas Compressors 175 300 242.1 117 

1998 2268006020 CNG - Gas Compressors 300 600 401.9 38 

1998 2265006025 4-Str Welders 3 6 5.974 6,910 

1998 2265006025 4-Str Welders 6 11 9.326 26,796 

1998 2265006025 4-Str Welders 11 16 15.71 98,775 

1998 2265006025 4-Str Welders 16 25 18.20 32,951 

1998 2265006025 4-Str Welders 50 75 63.63 7,778 

1998 2265006025 4-Str Welders 75 100 80.00 691 

1998 2265006025 4-Str Welders 100 175 130.0 156 

1998 2267006025 LPG - Welders 50 75 63.63 7,778 

1998 2267006025 LPG - Welders 75 100 80.00 691 

1998 2267006025 LPG - Welders 100 175 130 156 

1998 2265006030 4-Str Pressure Washers 1 3 3.00 164 

1998 2265006030 4-Str Pressure Washers 3 6 4.827 872,534 

1998 2265006030 4-Str Pressure Washers 6 11 9.104 539,616 

1998 2265006030 4-Str Pressure Washers 11 16 14.13 160,083 

1998 2265006030 4-Str Pressure Washers 16 25 18.8 30,104 

1998 2265006030 4-Str Pressure Washers 25 40 36.55 510 

1998 2265006030 4-Str Pressure Washers 50 75 66 39 

1998 2265006030 4-Str Pressure Washers 75 100 86 1 

1998 2267006030 LPG - Pressure Washers 25 40 36.55 510 

1998 2267006030 LPG - Pressure Washers 50 75 66 39 

1998 2267006030 LPG - Pressure Washers 75 100 86 1 

1998 2260006035 2-Str Hydro Power Units 1 3 1.709 1,273 

1998 2265006035 4-Str Hydro Power Units 3 6 4.834 6,056 

1998 2265006035 4-Str Hydro Power Units 6 11 9.855 5,486 

1998 2265006035 4-Str Hydro Power Units 11 16 13.1 4,322 

1998 2265006035 4-Str Hydro Power Units 16 25 18.35 4,424 

1998 2265006035 4-Str Hydro Power Units 25 40 33.91 67 

1998 2265006035 4-Str Hydro Power Units 40 50 46 28 

1998 2265006035 4-Str Hydro Power Units 50 75 66.79 66 

1998 2265006035 4-Str Hydro Power Units 100 175 113 1 

1998 2267006035 LPG - Hydro Power Units 25 40 33.91 67 

1998 2267006035 LPG - Hydro Power Units 40 50 46 28 

1998 2267006035 LPG - Hydro Power Units 50 75 66.79 66 

1998 2267006035 LPG - Hydro Power Units 100 175 154 1 

1998 2268006035 CNG - Hydro Power Units 100 175 148 1 

1996 2260007005 2-Str Chain Saws > 6 HP 6 11 6.81 29,500 

1998 2265007010 4-Str Shredders > 6 HP 6 11 8.117 187,298 

A11 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

1998 2265007010 4-Str Shredders > 6 HP 11 16 12.62 10,359 

1998 2265007010 4-Str Shredders > 6 HP 16 25 20.56 3,357 

1998 2265007015 4-Str Forest Eqp - Feller/Bunch/Skidder 3 6 5.50 326 

1998 2265007015 4-Str Forest Eqp - Feller/Bunch/Skidder 6 11 9.00 134 

1998 2265008005 4-Str Airport Support Equipment 3 6 4.861 897 

1998 2265008005 4-Str Airport Support Equipment 6 11 8.171 102 

1998 2265008005 4-Str Airport Support Equipment 11 16 16.00 363 

1998 2265008005 4-Str Airport Support Equipment 16 25 18.36 19 

1998 2265008005 4-Str Airport Support Equipment 25 40 37.0 21 

1998 2265008005 4-Str Airport Support Equipment 40 50 46.0 7 

1998 2265008005 4-Str Airport Support Equipment 50 75 59.0 23 

1998 2265008005 4-Str Airport Support Equipment 75 100 86.16 97 

1998 2265008005 4-Str Airport Support Equipment 100 175 113.0 287 

1998 2267008005 LPG - Airport Support Equipment 25 40 37.0 21 

1998 2267008005 LPG - Airport Support Equipment 40 50 46.0 7 

1998 2267008005 LPG - Airport Support Equipment 50 75 59.0 23 

1998 2267008005 LPG - Airport Support Equipment 75 100 86.16 97 

1998 2267008005 LPG - Airport Support Equipment 100 175 113.0 287 

1998 2265010010 4-Str Other Oil Field Equipment 6 11 9.568 4,015 

1998 2265010010 4-Str Other Oil Field Equipment 11 16 12.68 7,361 

1998 2265010010 4-Str Other Oil Field Equipment 16 25 20.31 4,889 

1998 2265010010 4-Str Other Oil Field Equipment 25 40 37 0 

1998 2268010010 CNG - Other Oil Field Equipment 25 40 32.59 4,792 

1998 2268010010 CNG - Other Oil Field Equipment 40 50 43.74 656 

1998 2268010010 CNG - Other Oil Field Equipment 50 75 57.77 2,033 

1998 2268010010 CNG - Other Oil Field Equipment 75 100 81.7 74 

1998 2268010010 CNG - Other Oil Field Equipment 100 175 131.1 201 

1998 2268010010 CNG - Other Oil Field Equipment 600 750 725 14 

2000 2270001060 Dsl - Specialty Vehicle Carts 11 16 15 464 

2000 2270001060 Dsl - Specialty Vehicle Carts 16 25 21.27 16,886 

2000 2270001060 Dsl - Specialty Vehicle Carts 25 40 28.44 11,675 

2000 2270001060 Dsl - Specialty Vehicle Carts 40 50 46.5 39 

2000 2270001060 Dsl - Specialty Vehicle Carts 50 75 62.54 248 

2000 2270001060 Dsl - Specialty Vehicle Carts 75 100 88.43 246 

2000 2270001060 Dsl - Specialty Vehicle Carts 100 175 144.7 2,068 

2000 2270001060 Dsl - Specialty Vehicle Carts 175 300 252.4 1,820 

2000 2270001060 Dsl - Specialty Vehicle Carts 300 600 373.8 804 

2000 2270001060 Dsl - Specialty Vehicle Carts 1000 1200 1200 30 

2000 2270002003 Dsl - Pavers 16 25 21.9 102 

2000 2270002003 Dsl - Pavers 25 40 32.8 2,499 

2000 2270002003 Dsl - Pavers 40 50 45.34 232 

2000 2270002003 Dsl - Pavers 50 75 62.96 4,743 

2000 2270002003 Dsl - Pavers 75 100 86.65 2,953 

2000 2270002003 Dsl - Pavers 100 175 134.6 6,469 

2000 2270002003 Dsl - Pavers 175 300 221.1 4,542 

2000 2270002003 Dsl - Pavers 300 600 386.9 585 

2000 2270002006 Dsl - Tampers/Rammers 3 6 4.2 2,446 

2000 2270002009 Dsl - Plate Compactors 3 6 4.937 12,246 

A12 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270002009 Dsl - Plate Compactors 6 11 8.554 5,471 

2000 2270002009 Dsl - Plate Compactors 11 16 14.22 3,328 

2000 2270002009 Dsl - Plate Compactors 16 25 20.35 307 

2000 2270002015 Dsl - Rollers 3 6 5.438 1,319 

2000 2270002015 Dsl - Rollers 6 11 8.695 2,475 

2000 2270002015 Dsl - Rollers 11 16 13.55 2,963 

2000 2270002015 Dsl - Rollers 16 25 19.68 5,318 

2000 2270002015 Dsl - Rollers 25 40 32.52 7,585 

2000 2270002015 Dsl - Rollers 40 50 45.81 7,030 

2000 2270002015 Dsl - Rollers 50 75 60.74 7,118 

2000 2270002015 Dsl - Rollers 75 100 84.76 19,481 

2000 2270002015 Dsl - Rollers 100 175 132.2 18,063 

2000 2270002015 Dsl - Rollers 175 300 217 6,167 

2000 2270002015 Dsl - Rollers 300 600 420.5 1,829 

2000 2270002018 Dsl - Scrapers 50 75 66 5 

2000 2270002018 Dsl - Scrapers 100 175 160.8 491 

2000 2270002018 Dsl - Scrapers 175 300 246.9 5,648 

2000 2270002018 Dsl - Scrapers 300 600 422.5 7,313 

2000 2270002018 Dsl - Scrapers 600 750 687.6 3,393 

2000 2270002018 Dsl - Scrapers 750 1000 760 4 

2000 2270002021 Dsl - Paving Equipment 3 6 4.62 1,056 

2000 2270002021 Dsl - Paving Equipment 6 11 7.3 1,184 

2000 2270002021 Dsl - Paving Equipment 11 16 14.7 91 

2000 2270002021 Dsl - Paving Equipment 16 25 19.72 610 

2000 2270002021 Dsl - Paving Equipment 25 40 33.82 812 

2000 2270002021 Dsl - Paving Equipment 40 50 41 0 

2000 2270002021 Dsl - Paving Equipment 50 75 61.05 797 

2000 2270002021 Dsl - Paving Equipment 75 100 83.23 940 

2000 2270002021 Dsl - Paving Equipment 100 175 131.3 1,715 

2000 2270002021 Dsl - Paving Equipment 175 300 230.2 532 

2000 2270002021 Dsl - Paving Equipment 300 600 460 24 

2000 2270002024 Dsl - Surfacing Equipment 6 11 6.7 19 

2000 2270002024 Dsl - Surfacing Equipment 11 16 13.3 61 

2000 2270002024 Dsl - Surfacing Equipment 16 25 21.66 912 

2000 2270002024 Dsl - Surfacing Equipment 25 40 31.69 764 

2000 2270002024 Dsl - Surfacing Equipment 40 50 44.9 264 

2000 2270002024 Dsl - Surfacing Equipment 50 75 54.93 14 

2000 2270002024 Dsl - Surfacing Equipment 75 100 80.9 724 

2000 2270002024 Dsl - Surfacing Equipment 100 175 126.5 222 

2000 2270002024 Dsl - Surfacing Equipment 175 300 233 10 

2000 2270002024 Dsl - Surfacing Equipment 300 600 492.6 222 

2000 2270002024 Dsl - Surfacing Equipment 600 750 713.5 98 

2000 2270002024 Dsl - Surfacing Equipment 750 1000 897 20 

2000 2270002024 Dsl - Surfacing Equipment 1000 1200 1050 2 

2000 2270002024 Dsl - Surfacing Equipment 1200 2000 1544 15 

2000 2270002027 Dsl - Signal Boards/Light Plants 3 6 5.4 1,982 

2000 2270002027 Dsl - Signal Boards/Light Plants 6 11 7.775 4,666 

2000 2270002027 Dsl - Signal Boards/Light Plants 11 16 13.73 2,492 

A13 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270002027 Dsl - Signal Boards/Light Plants 16 25 22.18 39,467 

2000 2270002027 Dsl - Signal Boards/Light Plants 25 40 30.32 12,108 

2000 2270002027 Dsl - Signal Boards/Light Plants 40 50 42.2 21 

2000 2270002027 Dsl - Signal Boards/Light Plants 50 75 59.28 865 

2000 2270002027 Dsl - Signal Boards/Light Plants 75 100 89 502 

2000 2270002027 Dsl - Signal Boards/Light Plants 100 175 157.5 399 

2000 2270002027 Dsl - Signal Boards/Light Plants 175 300 216 98 

2000 2270002030 Dsl - Trenchers 3 6 5 0 

2000 2270002030 Dsl - Trenchers 6 11 9.6 6 

2000 2270002030 Dsl - Trenchers 11 16 15.5 72 

2000 2270002030 Dsl - Trenchers 16 25 21.6 100 

2000 2270002030 Dsl - Trenchers 25 40 34.1 5,457 

2000 2270002030 Dsl - Trenchers 40 50 45.05 13,605 

2000 2270002030 Dsl - Trenchers 50 75 61.02 22,633 

2000 2270002030 Dsl - Trenchers 75 100 86.75 9,142 

2000 2270002030 Dsl - Trenchers 100 175 134.3 2,840 

2000 2270002030 Dsl - Trenchers 175 300 250.5 1,897 

2000 2270002030 Dsl - Trenchers 300 600 414.6 964 

2000 2270002030 Dsl - Trenchers 600 750 741.7 84 

2000 2270002030 Dsl - Trenchers 1200 2000 1500 10 

2000 2270002033 Dsl - Bore/Drill Rigs 6 11 8 57 

2000 2270002033 Dsl - Bore/Drill Rigs 11 16 14.5 88 

2000 2270002033 Dsl - Bore/Drill Rigs 16 25 23.48 197 

2000 2270002033 Dsl - Bore/Drill Rigs 25 40 31.48 3,362 

2000 2270002033 Dsl - Bore/Drill Rigs 40 50 44.93 3,420 

2000 2270002033 Dsl - Bore/Drill Rigs 50 75 61.85 5,542 

2000 2270002033 Dsl - Bore/Drill Rigs 75 100 85.12 5,637 

2000 2270002033 Dsl - Bore/Drill Rigs 100 175 131.8 8,286 

2000 2270002033 Dsl - Bore/Drill Rigs 175 300 239.2 7,203 

2000 2270002033 Dsl - Bore/Drill Rigs 300 600 447.1 4,151 

2000 2270002033 Dsl - Bore/Drill Rigs 600 750 690.5 971 

2000 2270002033 Dsl - Bore/Drill Rigs 750 1000 869 531 

2000 2270002033 Dsl - Bore/Drill Rigs 1000 1200 1050 11 

2000 2270002033 Dsl - Bore/Drill Rigs 1200 2000 1500 19 

2000 2270002036 Dsl - Excavators 3 6 6 66 

2000 2270002036 Dsl - Excavators 6 11 7.967 364 

2000 2270002036 Dsl - Excavators 11 16 13.14 749 

2000 2270002036 Dsl - Excavators 16 25 21.54 3,339 

2000 2270002036 Dsl - Excavators 25 40 33.05 6,917 

2000 2270002036 Dsl - Excavators 40 50 45.77 3,688 

2000 2270002036 Dsl - Excavators 50 75 61.3 2,861 

2000 2270002036 Dsl - Excavators 75 100 91.67 12,912 

2000 2270002036 Dsl - Excavators 100 175 137.6 48,245 

2000 2270002036 Dsl - Excavators 175 300 233.3 35,271 

2000 2270002036 Dsl - Excavators 300 600 410.6 9,344 

2000 2270002036 Dsl - Excavators 600 750 719.4 297 

2000 2270002036 Dsl - Excavators 750 1000 884 344 

2000 2270002036 Dsl - Excavators 1000 1200 1200 11 

A14 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270002036 Dsl - Excavators 1200 2000 1768 131 

2000 2270002036 Dsl - Excavators 2000 3000 2350 5 

2000 2270002039 Dsl - Concrete/Industrial Saws 6 11 10 304 

2000 2270002039 Dsl - Concrete/Industrial Saws 16 25 20.12 519 

2000 2270002039 Dsl - Concrete/Industrial Saws 25 40 32.94 2,977 

2000 2270002039 Dsl - Concrete/Industrial Saws 40 50 43.2 107 

2000 2270002039 Dsl - Concrete/Industrial Saws 50 75 57.85 955 

2000 2270002039 Dsl - Concrete/Industrial Saws 75 100 81.47 1,374 

2000 2270002039 Dsl - Concrete/Industrial Saws 100 175 120.9 168 

2000 2270002039 Dsl - Concrete/Industrial Saws 175 300 241.5 4 

2000 2270002042 Dsl - Cement & Mortar Mixers 3 6 5.983 6,051 

2000 2270002042 Dsl - Cement & Mortar Mixers 6 11 8.082 3,607 

2000 2270002042 Dsl - Cement & Mortar Mixers 11 16 13.08 670 

2000 2270002042 Dsl - Cement & Mortar Mixers 16 25 21.08 610 

2000 2270002042 Dsl - Cement & Mortar Mixers 25 40 32.78 444 

2000 2270002042 Dsl - Cement & Mortar Mixers 40 50 45.5 0 

2000 2270002042 Dsl - Cement & Mortar Mixers 50 75 59.56 761 

2000 2270002042 Dsl - Cement & Mortar Mixers 75 100 83.46 1,272 

2000 2270002042 Dsl - Cement & Mortar Mixers 100 175 128.9 403 

2000 2270002042 Dsl - Cement & Mortar Mixers 175 300 253.1 143 

2000 2270002042 Dsl - Cement & Mortar Mixers 300 600 402.3 180 

2000 2270002042 Dsl - Cement & Mortar Mixers 600 750 704.7 36 

2000 2270002045 Dsl - Cranes 16 25 23 0 

2000 2270002045 Dsl - Cranes 25 40 39.4 551 

2000 2270002045 Dsl - Cranes 40 50 41.7 8 

2000 2270002045 Dsl - Cranes 50 75 64 293 

2000 2270002045 Dsl - Cranes 75 100 88.14 2,839 

2000 2270002045 Dsl - Cranes 100 175 145.2 10,690 

2000 2270002045 Dsl - Cranes 175 300 237.7 10,934 

2000 2270002045 Dsl - Cranes 300 600 412 6,734 

2000 2270002045 Dsl - Cranes 600 750 669 290 

2000 2270002045 Dsl - Cranes 750 1000 882.8 82 

2000 2270002045 Dsl - Cranes 1000 1200 1071 3 

2000 2270002048 Dsl - Graders 25 40 35 0 

2000 2270002048 Dsl - Graders 40 50 48.3 16 

2000 2270002048 Dsl - Graders 50 75 59.54 126 

2000 2270002048 Dsl - Graders 75 100 84.21 972 

2000 2270002048 Dsl - Graders 100 175 140.8 9,932 

2000 2270002048 Dsl - Graders 175 300 231.2 16,634 

2000 2270002048 Dsl - Graders 300 600 341.8 1,902 

2000 2270002048 Dsl - Graders 600 750 750 115 

2000 2270002051 Dsl - Off-highway Trucks 100 175 160.5 26 

2000 2270002051 Dsl - Off-highway Trucks 175 300 244.3 2,497 

2000 2270002051 Dsl - Off-highway Trucks 300 600 419.9 5,299 

2000 2270002051 Dsl - Off-highway Trucks 600 750 688.1 3,000 

2000 2270002051 Dsl - Off-highway Trucks 750 1000 868 1,457 

2000 2270002051 Dsl - Off-highway Trucks 1000 1200 1153 461 

2000 2270002051 Dsl - Off-highway Trucks 1200 2000 1787 2,333 

A15 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270002051 Dsl - Off-highway Trucks 2000 3000 2424 568 

2000 2270002054 Dsl - Crushing/Proc. Equipment 16 25 20.42 65 

2000 2270002054 Dsl - Crushing/Proc. Equipment 25 40 32.1 89 

2000 2270002054 Dsl - Crushing/Proc. Equipment 40 50 45.6 336 

2000 2270002054 Dsl - Crushing/Proc. Equipment 50 75 60.74 3,830 

2000 2270002054 Dsl - Crushing/Proc. Equipment 75 100 88.98 926 

2000 2270002054 Dsl - Crushing/Proc. Equipment 100 175 132.3 1,451 

2000 2270002054 Dsl - Crushing/Proc. Equipment 175 300 241.3 547 

2000 2270002054 Dsl - Crushing/Proc. Equipment 300 600 423.2 1,424 

2000 2270002054 Dsl - Crushing/Proc. Equipment 600 750 666.3 108 

2000 2270002054 Dsl - Crushing/Proc. Equipment 750 1000 920 8 

2000 2270002057 Dsl - Rough Terrain Forklifts 11 16 13.5 15 

2000 2270002057 Dsl - Rough Terrain Forklifts 16 25 22.45 195 

2000 2270002057 Dsl - Rough Terrain Forklifts 25 40 33.36 4,563 

2000 2270002057 Dsl - Rough Terrain Forklifts 40 50 45.06 5,079 

2000 2270002057 Dsl - Rough Terrain Forklifts 50 75 61.42 10,068 

2000 2270002057 Dsl - Rough Terrain Forklifts 75 100 85.6 57,611 

2000 2270002057 Dsl - Rough Terrain Forklifts 100 175 126 29,594 

2000 2270002057 Dsl - Rough Terrain Forklifts 175 300 229.1 1,534 

2000 2270002057 Dsl - Rough Terrain Forklifts 300 600 346.1 2,019 

2000 2270002060 Dsl - Rubber Tire Loaders 6 11 8.336 0 

2000 2270002060 Dsl - Rubber Tire Loaders 11 16 15.4 0 

2000 2270002060 Dsl - Rubber Tire Loaders 16 25 22.83 45 

2000 2270002060 Dsl - Rubber Tire Loaders 25 40 34.38 2,308 

2000 2270002060 Dsl - Rubber Tire Loaders 40 50 45.44 2,650 

2000 2270002060 Dsl - Rubber Tire Loaders 50 75 61.7 3,748 

2000 2270002060 Dsl - Rubber Tire Loaders 75 100 85.48 16,113 

2000 2270002060 Dsl - Rubber Tire Loaders 100 175 136.3 40,747 

2000 2270002060 Dsl - Rubber Tire Loaders 175 300 230 38,900 

2000 2270002060 Dsl - Rubber Tire Loaders 300 600 419.4 28,540 

2000 2270002060 Dsl - Rubber Tire Loaders 600 750 692.2 2,157 

2000 2270002060 Dsl - Rubber Tire Loaders 750 1000 866.3 1,051 

2000 2270002060 Dsl - Rubber Tire Loaders 1000 1200 1082 219 

2000 2270002060 Dsl - Rubber Tire Loaders 1200 2000 1867 1,287 

2000 2270002060 Dsl - Rubber Tire Loaders 2000 3000 2243 46 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 11 16 15.5 5 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 16 25 22.78 2,346 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 25 40 32.49 4,689 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 40 50 46.23 2,505 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 50 75 62.46 46,795 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 75 100 87.17 165,326 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 100 175 120.7 110,004 

2000 2270002066 Dsl - Tractors/Loaders/Backhoes 175 300 200 599 

2000 2270002069 Dsl - Crawler Tractor/Dozers 25 40 25.75 0 

2000 2270002069 Dsl - Crawler Tractor/Dozers 40 50 42.5 0 

2000 2270002069 Dsl - Crawler Tractor/Dozers 50 75 57.98 485 

2000 2270002069 Dsl - Crawler Tractor/Dozers 75 100 87.86 13,961 

2000 2270002069 Dsl - Crawler Tractor/Dozers 100 175 136.1 31,552 

A16 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270002069 Dsl - Crawler Tractor/Dozers 175 300 235.5 27,323 

2000 2270002069 Dsl - Crawler Tractor/Dozers 300 600 425.3 13,835 

2000 2270002069 Dsl - Crawler Tractor/Dozers 600 750 707 5,458 

2000 2270002069 Dsl - Crawler Tractor/Dozers 750 1000 923 1,129 

2000 2270002069 Dsl - Crawler Tractor/Dozers 1000 1200 1065 1,964 

2000 2270002069 Dsl - Crawler Tractor/Dozers 1200 2000 1473 9 

2000 2270002072 Dsl - Skid Steer Loaders 6 11 9.5 125 

2000 2270002072 Dsl - Skid Steer Loaders 11 16 15.47 20,644 

2000 2270002072 Dsl - Skid Steer Loaders 16 25 20.3 45,772 

2000 2270002072 Dsl - Skid Steer Loaders 25 40 34.97 89,565 

2000 2270002072 Dsl - Skid Steer Loaders 40 50 44.94 35,417 

2000 2270002072 Dsl - Skid Steer Loaders 50 75 57.67 194,482 

2000 2270002072 Dsl - Skid Steer Loaders 75 100 84.35 127,851 

2000 2270002072 Dsl - Skid Steer Loaders 100 175 115.3 3,220 

2000 2270002075 Dsl - Off-Highway Tractors 100 175 144.5 1 

2000 2270002075 Dsl - Off-Highway Tractors 175 300 290 435 

2000 2270002075 Dsl - Off-Highway Tractors 300 600 410.3 743 

2000 2270002075 Dsl - Off-Highway Tractors 600 750 676 1,777 

2000 2270002075 Dsl - Off-Highway Tractors 750 1000 907.8 582 

2000 2270002075 Dsl - Off-Highway Tractors 1000 1200 1139 56 

2000 2270002075 Dsl - Off-Highway Tractors 1200 2000 1516 460 

2000 2270002075 Dsl - Off-Highway Tractors 2000 3000 2283 11 

2000 2270002078 Dsl - Dumpers/Tenders 6 11 10 876 

2000 2270002078 Dsl - Dumpers/Tenders 11 16 14.31 838 

2000 2270002078 Dsl - Dumpers/Tenders 16 25 23.75 599 

2000 2270002078 Dsl - Dumpers/Tenders 25 40 32.15 694 

2000 2270002078 Dsl - Dumpers/Tenders 40 50 48.5 152 

2000 2270002078 Dsl - Dumpers/Tenders 50 75 57.8 72 

2000 2270002078 Dsl - Dumpers/Tenders 75 100 85.4 473 

2000 2270002078 Dsl - Dumpers/Tenders 100 175 109.7 171 

2000 2270002081 Dsl - Other Construction Equipment 6 11 7.9 28 

2000 2270002081 Dsl - Other Construction Equipment 11 16 15 12 

2000 2270002081 Dsl - Other Construction Equipment 16 25 21.1 127 

2000 2270002081 Dsl - Other Construction Equipment 25 40 34.14 364 

2000 2270002081 Dsl - Other Construction Equipment 40 50 44.43 33 

2000 2270002081 Dsl - Other Construction Equipment 50 75 59.85 354 

2000 2270002081 Dsl - Other Construction Equipment 75 100 84.28 349 

2000 2270002081 Dsl - Other Construction Equipment 100 175 137.7 2,424 

2000 2270002081 Dsl - Other Construction Equipment 175 300 233.7 2,164 

2000 2270002081 Dsl - Other Construction Equipment 300 600 442.6 5,226 

2000 2270002081 Dsl - Other Construction Equipment 600 750 710.2 953 

2000 2270002081 Dsl - Other Construction Equipment 750 1000 827.5 4 

2000 2270002081 Dsl - Other Construction Equipment 1000 1200 1200 63 

2000 2270003010 Dsl - Aerial Lifts 6 11 8 123 

2000 2270003010 Dsl - Aerial Lifts 11 16 13.18 813 

2000 2270003010 Dsl - Aerial Lifts 16 25 21.63 11,404 

2000 2270003010 Dsl - Aerial Lifts 25 40 33.05 14,165 

2000 2270003010 Dsl - Aerial Lifts 40 50 45.46 3,350 

A17 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270003010 Dsl - Aerial Lifts 50 75 60.46 23,806 

2000 2270003010 Dsl - Aerial Lifts 75 100 83.86 8,461 

2000 2270003010 Dsl - Aerial Lifts 100 175 113 103 

2000 2270003020 Dsl - Forklifts 11 16 15 16 

2000 2270003020 Dsl - Forklifts 16 25 25 4 

2000 2270003020 Dsl - Forklifts 25 40 34.68 41 

2000 2270003020 Dsl - Forklifts 40 50 47.02 485 

2000 2270003020 Dsl - Forklifts 50 75 61.74 17,974 

2000 2270003020 Dsl - Forklifts 75 100 85.48 18,108 

2000 2270003020 Dsl - Forklifts 100 175 135.6 6,503 

2000 2270003020 Dsl - Forklifts 175 300 220.3 1,058 

2000 2270003020 Dsl - Forklifts 300 600 353.9 1,351 

2000 2270003030 Dsl - Sweepers/Scrubbers 3 6 5 302 

2000 2270003030 Dsl - Sweepers/Scrubbers 6 11 11 14 

2000 2270003030 Dsl - Sweepers/Scrubbers 11 16 13.65 1 

2000 2270003030 Dsl - Sweepers/Scrubbers 16 25 21.69 1,845 

2000 2270003030 Dsl - Sweepers/Scrubbers 25 40 34.83 4,436 

2000 2270003030 Dsl - Sweepers/Scrubbers 40 50 43.64 2,993 

2000 2270003030 Dsl - Sweepers/Scrubbers 50 75 60.81 2,898 

2000 2270003030 Dsl - Sweepers/Scrubbers 75 100 81.86 10,672 

2000 2270003030 Dsl - Sweepers/Scrubbers 100 175 134.3 11,984 

2000 2270003030 Dsl - Sweepers/Scrubbers 175 300 216.7 3,222 

2000 2270003030 Dsl - Sweepers/Scrubbers 300 600 363.8 55 

2000 2270003040 Dsl - Other General Industrial Eqp 3 6 4.367 2,108 

2000 2270003040 Dsl - Other General Industrial Eqp 6 11 9.58 398 

2000 2270003040 Dsl - Other General Industrial Eqp 11 16 13.72 257 

2000 2270003040 Dsl - Other General Industrial Eqp 16 25 22.62 447 

2000 2270003040 Dsl - Other General Industrial Eqp 25 40 32.48 1,414 

2000 2270003040 Dsl - Other General Industrial Eqp 40 50 44.31 515 

2000 2270003040 Dsl - Other General Industrial Eqp 50 75 61.31 3,989 

2000 2270003040 Dsl - Other General Industrial Eqp 75 100 86.11 12,419 

2000 2270003040 Dsl - Other General Industrial Eqp 100 175 130.4 17,667 

2000 2270003040 Dsl - Other General Industrial Eqp 175 300 234.2 5,512 

2000 2270003040 Dsl - Other General Industrial Eqp 300 600 389.4 564 

2000 2270003040 Dsl - Other General Industrial Eqp 600 750 650 93 

2000 2270003040 Dsl - Other General Industrial Eqp 1200 2000 1350 0 

2000 2270003050 Dsl - Other Material Handling Eqp 6 11 8.5 0 

2000 2270003050 Dsl - Other Material Handling Eqp 16 25 19 0 

2000 2270003050 Dsl - Other Material Handling Eqp 25 40 37.2 336 

2000 2270003050 Dsl - Other Material Handling Eqp 50 75 64.73 1,691 

2000 2270003050 Dsl - Other Material Handling Eqp 75 100 86.43 510 

2000 2270003050 Dsl - Other Material Handling Eqp 100 175 128.9 2,345 

2000 2270003050 Dsl - Other Material Handling Eqp 175 300 245.2 892 

2000 2270003050 Dsl - Other Material Handling Eqp 300 600 428.3 123 

2000 2270003050 Dsl - Other Material Handling Eqp 1000 1200 1071 2 

2000 2270003060 Dsl - AC\Refrigeration 6 11 9.6 6,320 

2000 2270003060 Dsl - AC\Refrigeration 11 16 13.24 19,428 

2000 2270003060 Dsl - AC\Refrigeration 16 25 19.45 18,216 

A18 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270003060 Dsl - AC\Refrigeration 25 40 31.83 4,671 

2000 2270003060 Dsl - AC\Refrigeration 40 50 44.9 34,240 

2000 2270003060 Dsl - AC\Refrigeration 50 75 57 131,695 

2000 2270003060 Dsl - AC\Refrigeration 75 100 76 0 

2000 2270003070 Dsl - Terminal Tractors 6 11 8.3 0 

2000 2270003070 Dsl - Terminal Tractors 11 16 11.7 0 

2000 2270003070 Dsl - Terminal Tractors 16 25 21.2 11 

2000 2270003070 Dsl - Terminal Tractors 25 40 38.5 4 

2000 2270003070 Dsl - Terminal Tractors 40 50 41 0 

2000 2270003070 Dsl - Terminal Tractors 50 75 62.82 2,275 

2000 2270003070 Dsl - Terminal Tractors 75 100 84.18 3,947 

2000 2270003070 Dsl - Terminal Tractors 100 175 141.1 6,340 

2000 2270003070 Dsl - Terminal Tractors 175 300 221.4 10,556 

2000 2270003070 Dsl - Terminal Tractors 300 600 419 322 

2000 2270003070 Dsl - Terminal Tractors 600 750 655 0 

2000 2270004031 Dsl - Leafblowers/Vacuums (com) 3 6 5.667 277 

2000 2270004031 Dsl - Leafblowers/Vacuums (com) 25 40 28 67 

2000 2270004031 Dsl - Leafblowers/Vacuums (com) 40 50 49 0 

2000 2270004031 Dsl - Leafblowers/Vacuums (com) 50 75 61 0 

2000 2270004031 Dsl - Leafblowers/Vacuums (com) 75 100 95 0 

2000 2270004031 Dsl - Leafblowers/Vacuums (com) 100 175 118.5 0 

2000 2270004036 Dsl - Snowblowers (com) 100 175 165 22 

2000 2270004036 Dsl - Snowblowers (com) 175 300 251.8 189 

2000 2270004036 Dsl - Snowblowers (com) 300 600 384.4 235 

2000 2270004046 Dsl - Commercial Mowers (com) 3 6 5 280 

2000 2270004046 Dsl - Commercial Mowers (com) 6 11 7.35 0 

2000 2270004046 Dsl - Commercial Mowers (com) 11 16 14.12 7,869 

2000 2270004046 Dsl - Commercial Mowers (com) 16 25 20.87 109,208 

2000 2270004046 Dsl - Commercial Mowers (com) 25 40 31.28 52,933 

2000 2270004046 Dsl - Commercial Mowers (com) 40 50 44.66 11,824 

2000 2270004046 Dsl - Commercial Mowers (com) 50 75 55.08 19,417 

2000 2270004046 Dsl - Commercial Mowers (com) 75 100 82.63 4,151 

2000 2270004056 Dsl - Lawn & Garden Tractors (com) 6 11 10.5 32 

2000 2270004056 Dsl - Lawn & Garden Tractors (com) 11 16 14.62 1,921 

2000 2270004056 Dsl - Lawn & Garden Tractors (com) 16 25 20.03 47,948 

2000 2270004056 Dsl - Lawn & Garden Tractors (com) 25 40 26.33 832 

2000 2270004056 Dsl - Lawn & Garden Tractors (com) 40 50 44.5 480 

2000 2270004056 Dsl - Lawn & Garden Tractors (com) 75 100 80 731 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 16 25 25 11 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 25 40 37.2 178 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 40 50 47.12 1,891 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 50 75 61.07 7,053 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 75 100 84.47 31,166 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 100 175 121.3 9,868 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 175 300 241.7 5,958 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 300 600 434.4 5,053 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 600 750 702.9 1,144 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 750 1000 947.8 187 

A19 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270004066 Dsl - Chippers/Stump Grinders (com) 1000 1200 1095 23 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 6 11 7.75 0 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 11 16 13.56 1,121 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 16 25 21.15 1,458 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 25 40 34.57 2,687 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 40 50 45.47 1,306 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 50 75 62.87 24 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 75 100 83.82 1,374 

2000 2270004071 Dsl - Commercial Turf Equipment (com) 100 175 113 1,149 

2000 2270004076 Dsl - Other Lawn & Garden Eqp. (com) 11 16 15 32 

2000 2270004076 Dsl - Other Lawn & Garden Eqp. (com) 16 25 22.9 277 

2000 2270004076 Dsl - Other Lawn & Garden Eqp. (com) 25 40 32 1 

2000 2270004076 Dsl - Other Lawn & Garden Eqp. (com) 40 50 47 6 

2000 2270004076 Dsl - Other Lawn & Garden Eqp. (com) 50 75 51 231 

2000 2270004076 Dsl - Other Lawn & Garden Eqp. (com) 75 100 80 62 

2000 2270004076 Dsl - Other Lawn & Garden Eqp. (com) 100 175 131 11 

2000 2270005010 Dsl - 2-Wheel Tractors 3 6 6 86 

2000 2270005010 Dsl - 2-Wheel Tractors 6 11 8.333 349 

2000 2270005015 Dsl - Agricultural Tractors 11 16 16 8 

2000 2270005015 Dsl - Agricultural Tractors 16 25 20.97 79,153 

2000 2270005015 Dsl - Agricultural Tractors 25 40 32.48 212,890 

2000 2270005015 Dsl - Agricultural Tractors 40 50 46.39 121,645 

2000 2270005015 Dsl - Agricultural Tractors 50 75 62.18 192,612 

2000 2270005015 Dsl - Agricultural Tractors 75 100 86.14 169,760 

2000 2270005015 Dsl - Agricultural Tractors 100 175 133.6 282,860 

2000 2270005015 Dsl - Agricultural Tractors 175 300 236.5 243,857 

2000 2270005015 Dsl - Agricultural Tractors 300 600 415.2 126,182 

2000 2270005015 Dsl - Agricultural Tractors 600 750 635 13 

2000 2270005020 Dsl - Combines 75 100 91 13,300 

2000 2270005020 Dsl - Combines 100 175 141.8 121,999 

2000 2270005020 Dsl - Combines 175 300 231.5 145,476 

2000 2270005020 Dsl - Combines 300 600 345.8 7,515 

2000 2270005025 Dsl - Balers 40 50 50 146 

2000 2270005025 Dsl - Balers 50 75 61.8 3,172 

2000 2270005025 Dsl - Balers 75 100 85.83 1,169 

2000 2270005025 Dsl - Balers 100 175 140 993 

2000 2270005025 Dsl - Balers 175 300 177 49 

2000 2270005030 Dsl - Agricultural Mowers 75 100 76 300 

2000 2270005035 Dsl - Sprayers 16 25 22.6 1,586 

2000 2270005035 Dsl - Sprayers 25 40 32.06 721 

2000 2270005035 Dsl - Sprayers 40 50 47.97 451 

2000 2270005035 Dsl - Sprayers 50 75 63.66 1,212 

2000 2270005035 Dsl - Sprayers 75 100 86.24 7,429 

2000 2270005035 Dsl - Sprayers 100 175 128.4 14,340 

2000 2270005035 Dsl - Sprayers 175 300 226.6 15,583 

2000 2270005035 Dsl - Sprayers 300 600 358.5 4,222 

2000 2270005040 Dsl - Tillers > 6 HP 3 6 6 31 

2000 2270005040 Dsl - Tillers > 6 HP 175 300 245 3 

A20 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270005040 Dsl - Tillers > 6 HP 300 600 424.5 12 

2000 2270005045 Dsl - Swathers 50 75 70 8,980 

2000 2270005045 Dsl - Swathers 75 100 85 42,439 

2000 2270005045 Dsl - Swathers 100 175 131.3 8,383 

2000 2270005045 Dsl - Swathers 175 300 200 375 

2000 2270005055 Dsl - Other Agricultural Equipment 6 11 10.5 24 

2000 2270005055 Dsl - Other Agricultural Equipment 11 16 14.38 279 

2000 2270005055 Dsl - Other Agricultural Equipment 16 25 20.87 1,013 

2000 2270005055 Dsl - Other Agricultural Equipment 25 40 32.08 536 

2000 2270005055 Dsl - Other Agricultural Equipment 40 50 45.02 326 

2000 2270005055 Dsl - Other Agricultural Equipment 50 75 62.64 2,537 

2000 2270005055 Dsl - Other Agricultural Equipment 75 100 84.95 3,171 

2000 2270005055 Dsl - Other Agricultural Equipment 100 175 135.5 7,901 

2000 2270005055 Dsl - Other Agricultural Equipment 175 300 230.4 7,993 

2000 2270005055 Dsl - Other Agricultural Equipment 300 600 375.1 3,349 

2000 2270005055 Dsl - Other Agricultural Equipment 750 1000 965 2 

2000 2270005060 Dsl - Irrigation Sets 6 11 8 0 

2000 2270005060 Dsl - Irrigation Sets 11 16 15.6 4 

2000 2270005060 Dsl - Irrigation Sets 16 25 21.88 638 

2000 2270005060 Dsl - Irrigation Sets 25 40 33 1,457 

2000 2270005060 Dsl - Irrigation Sets 40 50 45.08 578 

2000 2270005060 Dsl - Irrigation Sets 50 75 60.24 2,267 

2000 2270005060 Dsl - Irrigation Sets 75 100 85.87 10,702 

2000 2270005060 Dsl - Irrigation Sets 100 175 136.3 5,615 

2000 2270005060 Dsl - Irrigation Sets 175 300 224.5 1,597 

2000 2270005060 Dsl - Irrigation Sets 300 600 390 114 

2000 2270005060 Dsl - Irrigation Sets 600 750 704.7 0 

2000 2270006005 Dsl - Generator Sets 3 6 5.35 60,349 

2000 2270006005 Dsl - Generator Sets 6 11 8.418 60,257 

2000 2270006005 Dsl - Generator Sets 11 16 13.56 46,445 

2000 2270006005 Dsl - Generator Sets 16 25 21.29 73,131 

2000 2270006005 Dsl - Generator Sets 25 40 33.44 121,047 

2000 2270006005 Dsl - Generator Sets 40 50 45.19 16,533 

2000 2270006005 Dsl - Generator Sets 50 75 59.96 61,002 

2000 2270006005 Dsl - Generator Sets 75 100 86.42 74,241 

2000 2270006005 Dsl - Generator Sets 100 175 135.7 25,340 

2000 2270006005 Dsl - Generator Sets 175 300 238 14,089 

2000 2270006005 Dsl - Generator Sets 300 600 419.3 7,317 

2000 2270006005 Dsl - Generator Sets 600 750 682.1 0 

2000 2270006005 Dsl - Generator Sets 750 1000 887.1 0 

2000 2270006005 Dsl - Generator Sets 1000 1200 1112 0 

2000 2270006005 Dsl - Generator Sets 1200 2000 1655 0 

2000 2270006005 Dsl - Generator Sets 2000 3000 2401 0 

2000 2270006010 Dsl - Pumps 1 3 3 27 

2000 2270006010 Dsl - Pumps 3 6 5.225 10,390 

2000 2270006010 Dsl - Pumps 6 11 8.464 24,977 

2000 2270006010 Dsl - Pumps 11 16 13.73 6,266 

2000 2270006010 Dsl - Pumps 16 25 21.72 4,984 

A21 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270006010 Dsl - Pumps 25 40 34.32 8,669 

2000 2270006010 Dsl - Pumps 40 50 44.78 2,457 

2000 2270006010 Dsl - Pumps 50 75 62.38 16,632 

2000 2270006010 Dsl - Pumps 75 100 86.31 18,512 

2000 2270006010 Dsl - Pumps 100 175 132.4 8,163 

2000 2270006010 Dsl - Pumps 175 300 243.2 2,045 

2000 2270006010 Dsl - Pumps 300 600 397.6 1,036 

2000 2270006010 Dsl - Pumps 600 750 687.2 0 

2000 2270006010 Dsl - Pumps 750 1000 860 0 

2000 2270006010 Dsl - Pumps 1000 1200 1200 0 

2000 2270006010 Dsl - Pumps 1200 2000 1633 0 

2000 2270006010 Dsl - Pumps 2000 3000 2373 0 

2000 2270006015 Dsl - Air Compressors 3 6 5.567 354 

2000 2270006015 Dsl - Air Compressors 6 11 9.47 864 

2000 2270006015 Dsl - Air Compressors 11 16 13.34 117 

2000 2270006015 Dsl - Air Compressors 16 25 22.68 179 

2000 2270006015 Dsl - Air Compressors 25 40 33.5 6,636 

2000 2270006015 Dsl - Air Compressors 40 50 44.26 4,593 

2000 2270006015 Dsl - Air Compressors 50 75 60.76 29,440 

2000 2270006015 Dsl - Air Compressors 75 100 83.86 38,346 

2000 2270006015 Dsl - Air Compressors 100 175 129.2 4,397 

2000 2270006015 Dsl - Air Compressors 175 300 243.3 3,947 

2000 2270006015 Dsl - Air Compressors 300 600 427.4 1,128 

2000 2270006015 Dsl - Air Compressors 600 750 700 0 

2000 2270006020 Dsl - Gas Compressors 25 40 38 0 

2000 2270006020 Dsl - Gas Compressors 40 50 40.1 0 

2000 2270006020 Dsl - Gas Compressors 50 75 54.65 0 

2000 2270006020 Dsl - Gas Compressors 75 100 90 1 

2000 2270006020 Dsl - Gas Compressors 300 600 400.3 0 

2000 2270006025 Dsl - Welders 6 11 8.843 3,836 

2000 2270006025 Dsl - Welders 11 16 14.68 21,254 

2000 2270006025 Dsl - Welders 16 25 21.29 30,940 

2000 2270006025 Dsl - Welders 25 40 32.98 19,188 

2000 2270006025 Dsl - Welders 40 50 46.24 53,190 

2000 2270006025 Dsl - Welders 50 75 64.27 38,634 

2000 2270006025 Dsl - Welders 75 100 84.6 16,963 

2000 2270006025 Dsl - Welders 100 175 151.8 883 

2000 2270006025 Dsl - Welders 300 600 380 20 

2000 2270006025 Dsl - Welders 750 1000 800 0 

2000 2270006030 Dsl - Pressure Washers 3 6 5.18 671 

2000 2270006030 Dsl - Pressure Washers 6 11 9.041 5,716 

2000 2270006030 Dsl - Pressure Washers 11 16 13.97 6,562 

2000 2270006030 Dsl - Pressure Washers 16 25 20.42 8,194 

2000 2270006030 Dsl - Pressure Washers 25 40 31.23 7,831 

2000 2270006030 Dsl - Pressure Washers 40 50 45.31 981 

2000 2270006030 Dsl - Pressure Washers 50 75 61.34 3,294 

2000 2270006030 Dsl - Pressure Washers 75 100 88.53 921 

2000 2270006030 Dsl - Pressure Washers 100 175 128.3 3,060 

A22 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270006030 Dsl - Pressure Washers 175 300 226.2 2,476 

2000 2270006030 Dsl - Pressure Washers 300 600 415.5 379 

2000 2270006030 Dsl - Pressure Washers 600 750 688.9 177 

2000 2270006035 Dsl - Hydro Power Units 3 6 5.1 90 

2000 2270006035 Dsl - Hydro Power Units 6 11 8.575 201 

2000 2270006035 Dsl - Hydro Power Units 11 16 13.97 63 

2000 2270006035 Dsl - Hydro Power Units 16 25 20.54 589 

2000 2270006035 Dsl - Hydro Power Units 25 40 33.26 854 

2000 2270006035 Dsl - Hydro Power Units 40 50 42.73 269 

2000 2270006035 Dsl - Hydro Power Units 50 75 58.03 1,309 

2000 2270006035 Dsl - Hydro Power Units 75 100 83.95 1,512 

2000 2270006035 Dsl - Hydro Power Units 100 175 137.7 408 

2000 2270006035 Dsl - Hydro Power Units 175 300 226.8 53 

2000 2270006035 Dsl - Hydro Power Units 300 600 439 13 

2000 2270006035 Dsl - Hydro Power Units 600 750 700 0 

2000 2270007010 Dsl - Shredders > 6 HP 40 50 0 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 25 40 35.47 12 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 40 50 44.93 17 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 50 75 65.09 24 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 75 100 88.96 1,192 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 100 175 137 8,269 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 175 300 225.2 11,850 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 300 600 421.3 1,024 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 600 750 689.3 419 

2000 2270007015 Dsl - Forest Eqp - Feller/Bunch/Skidder 1000 1200 1050 11 

2000 2270008005 Dsl - Airport Support Equipment 6 11 7.65 1,124 

2000 2270008005 Dsl - Airport Support Equipment 11 16 15.5 3 

2000 2270008005 Dsl - Airport Support Equipment 16 25 25 14 

2000 2270008005 Dsl - Airport Support Equipment 25 40 32.46 41 

2000 2270008005 Dsl - Airport Support Equipment 40 50 42.82 57 

2000 2270008005 Dsl - Airport Support Equipment 50 75 61.23 1,176 

2000 2270008005 Dsl - Airport Support Equipment 75 100 85.4 2,142 

2000 2270008005 Dsl - Airport Support Equipment 100 175 135.6 6,327 

2000 2270008005 Dsl - Airport Support Equipment 175 300 228.8 2,124 

2000 2270008005 Dsl - Airport Support Equipment 300 600 443.4 2,481 

2000 2270008005 Dsl - Airport Support Equipment 600 750 667 263 

2000 2270008005 Dsl - Airport Support Equipment 1000 1200 1071 16 

2000 2270009010 Dsl - Other Underground Mining Equip 16 25 22.76 10 

2000 2270009010 Dsl - Other Underground Mining Equip 25 40 31.89 252 

2000 2270009010 Dsl - Other Underground Mining Equip 40 50 44.42 497 

2000 2270009010 Dsl - Other Underground Mining Equip 50 75 60 1,285 

2000 2270009010 Dsl - Other Underground Mining Equip 75 100 92.49 2,271 

2000 2270009010 Dsl - Other Underground Mining Equip 100 175 145 2,419 

2000 2270009010 Dsl - Other Underground Mining Equip 175 300 251.1 758 

2000 2270009010 Dsl - Other Underground Mining Equip 300 600 339.6 376 

2000 2270010010 Dsl - Other Oil Field Equipment 6 11 9 0 

2000 2270010010 Dsl - Other Oil Field Equipment 16 25 20.1 0 

2000 2270010010 Dsl - Other Oil Field Equipment 25 40 36.79 232 

A23 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2270010010 Dsl - Other Oil Field Equipment 40 50 44.36 113 

2000 2270010010 Dsl - Other Oil Field Equipment 50 75 62.68 1,055 

2000 2270010010 Dsl - Other Oil Field Equipment 75 100 87.93 155 

2000 2270010010 Dsl - Other Oil Field Equipment 100 175 136.7 2,195 

2000 2270010010 Dsl - Other Oil Field Equipment 175 300 255.3 1,117 

2000 2270010010 Dsl - Other Oil Field Equipment 300 600 401.9 1,617 

2000 2270010010 Dsl - Other Oil Field Equipment 600 750 681.7 1,024 

2000 2270010010 Dsl - Other Oil Field Equipment 750 1000 887.3 425 

2000 2270010010 Dsl - Other Oil Field Equipment 1000 1200 1110 189 

2000 2270010010 Dsl - Other Oil Field Equipment 1200 2000 1492 231 

2000 2270010010 Dsl - Other Oil Field Equipment 2000 3000 2268 6 

1998 2282005010 2-Str Outboard 1 3 2.41 177,107 

1998 2282005010 2-Str Outboard 3 6 5.34 660,643 

1998 2282005010 2-Str Outboard 6 11 8.76 995,028 

1998 2282005010 2-Str Outboard 11 16 14.99 221,228 

1998 2282005010 2-Str Outboard 16 25 21.54 435,716 

1998 2282005010 2-Str Outboard 25 40 36.00 841,662 

1998 2282005010 2-Str Outboard 40 50 49.34 647,452 

1998 2282005010 2-Str Outboard 50 75 63.50 1,082,796 

1998 2282005010 2-Str Outboard 75 100 85.00 735,549 

1998 2282005010 2-Str Outboard 100 175 139.4 1,645,496 

1998 2282005010 2-Str Outboard 175 300 217.9 1,477,105 

1998 2282005015 2-Str Personal Water Craft 1 3 704 

1998 2282005015 2-Str Personal Water Craft 3 6 680 

1998 2282005015 2-Str Personal Water Craft 6 11 6,488 

1998 2282005015 2-Str Personal Water Craft 16 25 18.41 12 

1998 2282005015 2-Str Personal Water Craft 25 40 36.75 6,889 

1998 2282005015 2-Str Personal Water Craft 40 50 43.95 2,777 

1998 2282005015 2-Str Personal Water Craft 50 75 73.10 61,559 

1998 2282005015 2-Str Personal Water Craft 75 100 88.90 227,683 

1998 2282005015 2-Str Personal Water Craft 100 175 116.3 843,496 

1998 2282005015 2-Str Personal Water Craft 175 300 55,495 

1998 2282010005 4-Str Inboard/Sterndrive 3 6 5.00 774 

1998 2282010005 4-Str Inboard/Sterndrive 6 11 10.00 554 

1998 2282010005 4-Str Inboard/Sterndrive 11 16 15.00 328 

1998 2282010005 4-Str Inboard/Sterndrive 25 40 30.47 1,415 

1998 2282010005 4-Str Inboard/Sterndrive 50 75 59.55 12,439 

1998 2282010005 4-Str Inboard/Sterndrive 75 100 0 

1998 2282010005 4-Str Inboard/Sterndrive 100 175 149.7 298,229 

1998 2282010005 4-Str Inboard/Sterndrive 175 300 211.1 1,106,937 

1998 2282010005 4-Str Inboard/Sterndrive 300 600 380.8 444,547 

1998 2282010005 4-Str Inboard/Sterndrive 600 750 630.0 7,500 

2000 2282020005 Dsl - Inboard 6 11 9.736 9,126 

2000 2282020005 Dsl - Inboard 11 16 14.92 4,478 

2000 2282020005 Dsl - Inboard 16 25 21.41 9,908 

2000 2282020005 Dsl - Inboard 25 40 31.2 5,421 

2000 2282020005 Dsl - Inboard 40 50 42.4 1,002 

2000 2282020005 Dsl - Inboard 50 75 56.19 8,784 

A24 
Base Year U.S. Population Estimates in Final NONROAD2008a* 

Year SCC Equipment Description HPmin HPmax HPavg Population 

2000 2282020005 Dsl - Inboard 75 100 94.22 7,397 

2000 2282020005 Dsl - Inboard 100 175 144.9 60,632 

2000 2282020005 Dsl - Inboard 175 300 223.1 99,703 

2000 2282020005 Dsl - Inboard 300 600 387.1 73,546 

2000 2282020005 Dsl - Inboard 600 750 677 2,902 

2000 2282020005 Dsl - Inboard 750 1000 876.5 5,502 

2000 2282020005 Dsl - Inboard 1000 1200 1154 448 

2000 2282020005 Dsl - Inboard 1200 2000 1369 1,573 

2000 2282020005 Dsl - Inboard 2000 3000 2294 964 

2000 2282020010 Dsl - Outboard 25 40 32.25 9,819 

2000 2285002015 Dsl - Railway Maintenance 3 6 4.2 13 

2000 2285002015 Dsl - Railway Maintenance 6 11 8.32 71 

2000 2285002015 Dsl - Railway Maintenance 11 16 14.13 78 

2000 2285002015 Dsl - Railway Maintenance 16 25 17.5 110 

2000 2285002015 Dsl - Railway Maintenance 25 40 33.34 408 

2000 2285002015 Dsl - Railway Maintenance 40 50 44.12 641 

2000 2285002015 Dsl - Railway Maintenance 50 75 59.61 1,169 

2000 2285002015 Dsl - Railway Maintenance 75 100 87.84 1,088 

2000 2285002015 Dsl - Railway Maintenance 100 175 134 4,595 

2000 2285002015 Dsl - Railway Maintenance 175 300 234 1,693 

2000 2285002015 Dsl - Railway Maintenance 300 600 453.2 286 

2000 2285002015 Dsl - Railway Maintenance 600 750 689.2 72 

2000 2285002015 Dsl - Railway Maintenance 750 1000 850 17 

2000 2285002015 Dsl - Railway Maintenance 1000 1200 1200 26 

2000 2285002015 Dsl - Railway Maintenance 1200 2000 1633 9 

1998 2285004015 4-Str Railway Maintenance 1 3 3.00 70 

1998 2285004015 4-Str Railway Maintenance 3 6 3.52 2,238 

1998 2285004015 4-Str Railway Maintenance 6 11 6.59 9,202 

1998 2285004015 4-Str Railway Maintenance 11 16 12.07 165 

1998 2285004015 4-Str Railway Maintenance 16 25 18.19 421 

1998 2285004015 4-Str Railway Maintenance 25 40 33.15 131 

1998 2285004015 4-Str Railway Maintenance 100 175 113.0 1 

1998 2285006015 LPG - Railway Maintenance 25 40 33.15 131 

1998 2285006015 LPG - Railway Maintenance 100 175 113.0 1 

* Inputs for ATV's and offroad motorcycles are set to allow calculations based on g/mile emission factors 

instead of g/bhp-hr. Thus the hp values shown here do not represent the actual in-use hp of these engines. 

A25 
 

 

Appendix B 

Engine Source Classification Code (SCC) Changes in NONROAD from NEVES 

SCC SCC Description in NONROAD Changes from NEVES 

22xx003060* Industrial Equipment AC\Refrigeration New Category 

22xx005060 Farm Equipment Irrigation Sets New Category 

22xx009010 Other Underground Mining Equipment New Category 

22xx010010 Other Oil Field Equipment New Category 

2285002015 Diesel Railway Maintenance New Category 

2285003015 2-Stroke Gasoline Railway Maintenance New Category 

2285004015 4-Stroke Gasoline Railway Maintenance New Category 

2285006015 LPG Railway Maintenance New Category 

2285008015 CNG Railway Maintenance New Category 

22xx006005 Light Commercial Generator Sets Engines Greater than 50 hp are 

included 

22xx006010 Light Commercial Pumps Engines Greater than 50 hp are 

included 

22xx006015 Light Commercial Air Compressors Engines Greater than 50 hp are 

included 

22xx006020 Light Commercial Gas Compressors Engines Greater than 50 hp are 

included 

22xx006025 Light Commercial Welders Engines Greater than 50 hp are 

included 

22xx002012 Construction Equipment Concrete Pavers Unused; population included in 

22xx002003 

22xx002003 Construction Equipment, Pavers New Description (Asphalt + 

Concrete) Pavers 

22xx007020 Logging Equipment Fellers/Bunchers Unused; population included in 

22xx007015 

22xx008005 Airport Service Equipment Changed SCC to 22xx003070 

because terminal tractors are not 

Airport Service Equipment 

22xx007015 Logging Equipment Forest Equipment New Description (Skidders + 

Fellers\Bunchers) 

22xx004010 Lawn & Garden Equipment Lawn mowers 

(Residential) 

New Description 

22xx004011 Lawn & Garden Equipment Lawn mowers 

(Commercial) 

New SCC 

22xx004015 Lawn & Garden Equipment Rotary Tillers < 6 HP 

(Residential) 

New Power Level, Description 

B1 
SCC SCC Description in NONROAD Changes from NEVES 

22xx004016 Lawn & Garden Equipment Rotary Tillers < 6 HP 

(Commercial) 

New SCC 

22xx004020 Lawn & Garden Equipment Chain Saws < 6 HP 

(Residential) 

New Power Level, Description 

22xx004021 Lawn & Garden Equipment Chain Saws < 6 HP 

(Commercial) 

New SCC 

22xx004025 Lawn & Garden Equipment 

Trimmers/Edgers/Brush Cutters (Residential) 

New Description 

22xx004026 Lawn & Garden Equipment 

Trimmers/Edgers/Brush Cutters (Commercial) 

New SCC 

22xx004030 Lawn & Garden Equipment Leafblowers/Vacuums 

(Residential) 

New Description 

22xx004031 Lawn & Garden Equipment Leafblowers/Vacuums 

(Commercial) 

New SCC 

22xx004035 Lawn & Garden Equipment Snowblowers 

(Residential) 

New Description 

22xx004036 Lawn & Garden Equipment Snowblowers 

(Commercial) 

New SCC 

22xx004040 Lawn & Garden Equipment Rear Engine Riding 

Mowers (Residential) 

New Description 

22xx004041 Lawn & Garden Equipment Rear Engine Riding 

Mowers (Commercial) 

New SCC 

22xx004045 Lawn & Garden Equipment Front Mowers 

(Residential) 

New Description 

22xx004046 Lawn & Garden Equipment Front Mowers 

(Commercial) 

New SCC 

22xx004050 Lawn & Garden Equipment Shredders < 6 HP 

(Residential) 

New Power Level, Description 

22xx004051 Lawn & Garden Equipment Shredders < 6 HP 

(Commercial) 

New SCC 

22xx004055 Lawn & Garden Equipment Lawn & Garden 

Tractors (Residential) 

New Description 

22xx004056 Lawn & Garden Equipment Lawn & Garden 

Tractors (Commercial) 

New SCC 

22xx004060 Lawn & Garden Equipment Wood Splitters 

(Residential) 

New Description 

22xx004061 Lawn & Garden Equipment Wood Splitters 

(Commercial) 

New SCC 

22xx004065 Lawn & Garden Equipment Chippers/Stump 

Grinders (Residential) 

New Description 

22xx004066 Lawn & Garden Equipment Chippers/Stump 

Grinders (Commercial) 

New SCC 

22xx004070 Lawn & Garden Equipment Commercial Turf 

Equipment (Residential) 

Unused; no >residential= commercial 

turf equipment 

22xx004071 Lawn & Garden Equipment Commercial Turf New SCC 

B2 
SCC SCC Description in NONROAD Changes from NEVES 

Equipment (Commercial) 

22xx004075 Lawn & Garden Equipment Other Lawn & Garden 

Equipment (Residential) 

New Description 

22xx004076 Lawn & Garden Equipment Other Lawn & Garden 

 Equipment (Commercial) 

New SCC 

22xx002069 Construction Equipment Crawler Dozer New Description (Changed from 

Tractor to Dozer) 

22xx004015 Lawn & Garden Equipment Rotary Tillers < 6 HP New Power Level 

22xx007005 Logging Equipment Chain Saws > 6 HP New Power Level 

22xx007010 Logging Equipment Shredders > 6 HP New Power Level 

2282005010 Recreational Pleasure Craft, Gasoline 2-Stroke 

Outboards 

Includes 2 and 4-stroke engines 

2282005015 Recreational Pleasure Craft, Gasoline 2-stroke 

Personal Water Craft 

New Description (Changed from 

Sterndrive to Personal Water Craft) 

Primarily 2-stroke 

2282010005 Recreational Pleasure Craft, Gasoline 4-Stroke 

Inboards 

Includes 2 and 4-stroke engines 

2282010015 Recreational Pleasure Craft, Gasoline 4-Stroke 

Sterndrive 

Unused 

2282010010 Recreational Pleasure Craft, Gasoline 4-Stroke 

Outboard 

Unused (included in 2282005010 

as a technical type) 

2282005020 Recreational Pleasure Craft, Gasoline 2-Stroke 

Sailboat Aux. Inboard 

Unused (included in 4-stroke 

Inboard) 

2282005025 Mobile Sources Marine Vessels, Recreational 

Pleasure Craft, Gasoline 2-Stroke Sailboat Aux. 

Outboard 

Unused (included in 4-stroke 

Outboard) 

2282010020 Recreational Pleasure Craft, Gasoline 4-Stroke 

Sailboat Aux. Inboard 

Unused (included in 4-stroke 

Inboard) 

2282010025 Recreational Pleasure Craft, Gasoline 4-Stroke 

Sailboat Aux. Outboard 

Unused (included in 4-stroke 

Outboard) 

2282005005 Recreational Pleasure Craft, Gasoline 2-Stroke 

Inboards 

Unused (included in 228201005 as 

a technical type) 

2282020015 Recreational Pleasure Craft, Diesel Sterndrive Unused (included in 2282020005) 

2282020020 Recreational Pleasure Craft, Diesel Sailboat Aux. 

Inboard 

Unused (included in 2282020025) 

* The “xx” denotes that all fuel types (diesel (“70"), 2-stroke gasoline (“60"), 4-stroke gasoline 

(“65"), LPG (“67"), and CNG (“68") engines) are included with the new or altered application 

categories. 

B3 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix C 

The conversion from PSR applications to SCC categories. 

SCC SCC Description PSR 

Code 

PSR Description 

22xx001010 Recreational Vehicles Motorcycles: Off-Road Included in 22xx001030 

22xx001020 Recreational Vehicles Snowmobiles 71 Snowmobile 

22xx001030 Recreational Vehicles All Terrain Vehicles 91 All-Terrain Vehicles 

22xx001040 Recreational Vehicles Minibikes 93 Mini-Bikes 

22xx001050 Recreational Vehicles Golf Carts 94 Golf Carts 

22xx001060 Recreational Vehicles Specialty Vehicle Carts 

[diesel now also includes PSR "Utility Vehicle" sales category] 

62 

+32 

Specialty Veh./Carts 

22xx002003 Construction Equipment Asphalt Pavers 41 Pavers 

22xx002006 Construction Equipment Tampers/Rammers 95 Tampers/Rammer 

22xx002009 Construction Equipment Plate Compactors 61 Plate Compactors 

22xx002012 Construction Equipment Concrete Pavers Unused (included in 

22xx002003) 

22xx002015 Construction Equipment Rollers 39 Rollers 

22xx002018 Construction Equipment Scrapers 29 Scrapers 

22xx002021 Construction Equipment Paving Equipment 35 Paving Equipment 

22xx002024 Construction Equipment Surfacing Equipment 23 Surfacing Equipment 

22xx002027 Construction Equipment Signal Boards 73 Light Plants 

22xx002030 Construction Equipment Trenchers 42 Trenchers 

22xx002033 Construction Equipment Bore/Drill Rigs 37 Bore/Drill Rigs 

22xx002036 Construction Equipment Excavators 28 Excavators 

22xx002039 Construction Equipment Concrete/Industrial Saws 77 Concrete/lnd Saws 

22xx002042 Construction Equipment Cement & Mortar Mixers 57 Cem/Mtr Mixers 

22xx002045 Construction Equipment Cranes 27 Cranes 

22xx002048 Construction Equipment Graders 30 Graders 

22xx002051 Construction Equipment Off-highway Trucks 40 Off-Highway Truck 

22xx002054 Construction Equipment Crushing/Proc. Equipment 34 Crush/Proc Equipment 

22xx002057 Construction Equipment Rough Terrain Forklifts 84 Rough Terrain Forklifts 

22xx002060 Construction Equipment Rubber Tire Loaders 33 R/T Loader 

22xx001060 [was Rubber Tire Dozers 22xx002063. EPA now combines #32 with 

#62 Specialty Vehicle Carts above] 

32 Utility Vehicles 

22xx002066 Construction Equipment Tractors/Loaders/Backhoes 43 Tractor\Loader\ 

Backhoe 

22xx002069 Construction Equipment Crawler Dozer 31 Crawler Dozers 

22xx002072 Construction Equipment Skid Steer Loaders 38 S/S Loader 

22xx002075 Construction Equipment Off-Highway Tractors 68 Off-Hwy Tractors 

22xx002078 Construction Equipment Dumpers/Tenders 60 Dumpers/Tenders 

22xx002081 Construction Equipment Other Construction Equipment 36 Other Construction 

22xx003010 Industrial Equipment Aerial Lifts 64 Aerial Lifts 

C1 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCC SCC Description PSR 

Code 

PSR Description 

22xx003020 Industrial Equipment Forklifts 18 Forklifts 

22xx003030 Industrial Equipment Sweepers/Scrubbers 21 Scrubbers/ Sweepers 

22xx003040 Industrial Equipment Other General Industrial Equipment 74 Other General Industrial 

22xx003050 Industrial Equipment Other Material Handling Equipment 19 Other Material Handling 

22xx003060 Industrial Equipment AC\Refrigeration 14 Refrigeration/AC 

22xx003070 Industrial Equipment Terminal Tractors 16 Terminal Tractors 

22xx004010 Lawn & Garden Equipment Lawn mowers (Residential) 65 Lawn Mowers 

22xx004011 Lawn & Garden Equipment Lawn mowers (Commercial) 65 Lawn Mowers 

22xx004015 Lawn & Garden Equipment Rotary Tillers < 6 HP (Residential) 59 Tillers 

22xx004016 as above except (Commercial) 59 Tillers 

22xx004020 Lawn & Garden Equipment Chain Saws < 6 HP (Residential) 70 Chainsaws 

22xx004021 as above except (Commercial) 70 Chainsaws 

22xx004025 Lawn & Garden Equipment Trimmers/Edgers/Brush Cutters 

(Residential) 

53 Trimmer/Edger/ Cutter 

22xx004026 as above except (Commercial) 53 Trimmer/Edger/ Cutter 

22xx004030 Lawn & Garden Equipment Leafblowers/Vacuums (Residential) 66 Leaf Blower/Vac 

22xx004031 as above except (Commercial) 66 Leaf Blower/Vac 

22xx004035 Lawn & Garden Equipment Snowblowers (Residential) 56 Snowblower 

22xx004036 as above except (Commercial) 56 Snowblower 

22xx004040 Lawn & Garden Equipment Rear Engine Riding Mowers 

(Residential) 

82 Rear Engine Rider 

22xx004041 as above except (Commercial) 82 Rear Engine Rider 

22xx004045 Lawn & Garden Equipment Front Mowers (Residential) 88 Front Mowers 

22xx004046 as above except (Commercial) [diesel versions are now referred to 

as "Commercial Mowers"] 

88 Front Mowers 

22xx004050 Lawn & Garden Equipment Shredders < 6 HP (Residential) 96 Shredders 

22xx004051 as above except (Commercial) 96 Shredders 

22xx004055 Lawn & Garden Equipment Lawn & Garden Tractors (Residential) 63 Lawn & Garden Tractor 

22xx004056 as above except (Commercial) 63 Lawn & Garden Tractor 

22xx004060 Lawn & Garden Equipment Wood Splitters (Residential) 75 Wood Splitter 

22xx004061 as above except (Commercial) 75 Wood Splitter 

22xx004065 Lawn & Garden Equipment Chippers/Stump Grinders (Residential) 26 Chippers/ Grinders 

22xx004066 as above except (Commercial) 26 Chippers/ Grinders 

22xx004070 Lawn & Garden Equipment Commercial Turf Equipment 

(Residential) 

Unused 

22xx004071 as above except (Commercial) 67 Commercial Turf 

22xx004075 Lawn & Garden Equipment Other Lawn & Garden Equipment 

(Residential) 

76 Other Lawn Garden 

22xx004076 as above except (Commercial) 76 Other Lawn Garden 

22xx005010 Farm Equipment 2-Wheel Tractors 98 2-Wheel Tractors 

22xx005015 Farm Equipment Agricultural Tractors 45 Agricultural Tractor 

C2 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCC SCC Description PSR 

Code 

PSR Description 

22xx005020 Farm Equipment Combines 47 Combines 

22xx005025 Farm Equipment Balers 49 Balers 

22xx005030 Farm Equipment Agricultural Mowers 55 Agricultural Mowers 

22xx005035 Farm Equipment Sprayers 69 Sprayers 

22xx005040 Farm Equipment Tillers > 6 HP 59 Tillers 

22xx005045 Farm Equipment Swathers 48 Swathers 

22xx005050 Farm Equipment Hydro Power Units 85 Hydro Power Unit 

22xx005055 Farm Equipment Other Agricultural Equipment 46 Other Ag Equipment 

22xx005060 Farm Equipment Irrigation Sets 44 Irrigation Sets 

22xx006005 Light Commercial Generator Sets 9 Generator Sets 

22xx006010 Light Commercial Pumps 11 Pumps 

22xx006015 Light Commercial Air Compressors 10 Air Compressors 

22xx006020 Light Commercial Gas Compressors 89 Gas Compressors 

22xx006025 Light Commercial Welders 17 Welders 

22xx006030 Light Commercial Pressure Washers 58 Pressure Washer 

22xx007005 Logging Equipment Chain Saws > 6 HP 70 Chainsaws 

22xx007010 Logging Equipment Shredders > 6 HP 96 Shredders 

22xx007015 Logging Equipment Skidders 24 Forest Equipment 

22xx007020 Logging Equipment Fellers/Bunchers Unused (included in 

22xx007015) 

22xx008005 Airport Service Equipment Airport Support Equipment 81 Aircraft Support 

22xx008010 Airport Service Equipment Terminal Tractors Unused 

22xx009010 Other Underground Mining Equipment 13 Underground Mine 

Equipment 

22xx010010 Other Oil Field Equipment 12 Oil Field Equipment 

22820xx005 Recreational Pleasure Craft, Inboards 50 Powerboats 

22820xx010 Recreational Pleasure Craft, Outboards 99 Outboard Motors 

2282005015 Pleasure Craft, Gasoline Personal Water Craft 92 New SCC Description 

22820xx020 

22820xx025 

Pleasure Craft, Sailboat Aux. Outboard 79 Sailboat Aux. 

Unused 

228500x015 Railway Maintenance 80 Railway Maintenance 

C3