Two grid cell resolutions were analyzed (4 km and 1.33 km horizontal resolution). For each grid cell resolution, six scenarios were examined. Two emission rates (100 kg/hr and 1000 kg/hr) were initially modeled in each of three different locations. The locations for the emission events were chosen to represent different magnitudes of routine emissions in the vicinity of the emission events and will be referred to as locations with low (~10 kg/hr/km 2 ), medium (~50 kg/hr/km 2 ) and high routine emission rates (~300 kg/hr/km 2 ). The six scenarios with two magnitudes at each of the three locations were performed at two different grid resolutions, creating the 12 initial scenarios. In addition, simulations with emission events near the primary emission events were performed as sensitivity analyses at both 4 km and 1.33 km grid resolution. At each location of a primary emission event (low, medium, and high routine emission locations), four nearby emission events were added to the background routine emissions to assess the extent to which nearby emission events might confound event detection.