Characterization of the Off-road Equipment Population
This page updated January 27, 2009
Chair’s Air Pollution Seminar
Thursday, January 29, 2009
Characterization of the
equipment is a major contributor to pollution levels in California,
generating ozone precursors, particulate matter, toxics, and carbon
dioxide. These equipment are found in a wide variety of
applications, including lawnmowers, bulldozers, aircraft support
equipment, and portable generators, among other categories.
Off-road equipment is used in essentially all types of businesses, as
well as in residential applications. Given the large number
of engines involved, and the highly diverse set of operators, off-road
engines have proven more difficult to characterize and control than
many other emission categories.
In order to develop a more comprehensive and consistent data set of engine characteristics and activity, the Air Resources Board contracted with Eastern Research Group (ERG) to conduct a study of off-road engines less than 175 horsepower operating in the state. The study was conducted in two phases, with equipment operator surveys and equipment instrumentation techniques developed and tested under Phase I, and full scale data collection and analysis taking place under Phase II. The study results include detailed information on equipment characteristics and activity, including application type, horsepower, and hours per year of use. Surrogates were developed to extrapolate the survey data to statewide totals, as well as to allocate equipment populations to the county level. Instrumentation of data loggers was also performed to collect engine-on time, in-use RPM and exhaust gas temperature data for different types of construction equipment. Based on the study findings, recommendations are provided for updating the current OFFROAD emission factor model, as well as the list of federally preempted off-road equipment in California.
Rick Baker, is a senior project manager with
Eastern Research Group's Mobile Sources Group in Austin
Texas. Mr. Baker works closely with the US Environmental
Protection Agency OTAQ as well as state, and local agencies in Texas,
California and other areas, assisting with the development of State
Implementation Plans (SIPs), Early Action Compacts, US EPA reporting
requirements (e.g., National Emission Inventory and National Toxics
Inventory submittals), among others.
more information on this seminar please contact: