John VanBruggen’s scientific contributions

The purpose of this project was to develop data specific to Midwest region states to improve upon EPA's default 2002 nonroad construction and agricultural engine emission estimates. In EPA's NONROAD emissions model, state-level populations and activity for construction and agricultural categories are derived from national sources of data, and county-level activity is estimated using surrogate indicators that may not always correlate well with local equipment use. Information was collected via survey methods, and from publically available sources of data, to develop local model inputs for equipment populations, engine characteristics, and spatial and temporal activity. These revised inputs will be used to support future Lake Michigan Air Directors Consortium (LADCO) regional emissions modeling efforts. owners and operators was performed, targeting businesses which are most likely to use these types of equipment. The survey results were used to develop more representative estimates of the types and number of equipment used, as well as information on the use of the equipment (i.e., during the day/week or throughout the year). For the agricultural equipment category, county-level diesel fuel consumption estimates were developed to improve upon the NONROAD model's methods for spatially allocating agricultural equipment activity. Weekly and monthly diesel fuel consumption were also estimated for each state to improve upon the monthly activity profile defaults in the NONROAD model. This study provides improvements to the NONROAD model inputs for Indiana, Illinois, Michigan, Ohio, and Wisconsin for construction equipment, and for these five states plus Iowa, Minnesota, and Missouri for agricultural equipment. Comparisons are provided between the data developed in this study and NONROAD model defaults. The data developed in this study will support LADCO in future regional emissions modeling efforts.