For each site, the DLQ algorithm is applied to the raw concentration measurements from each CMS solution. It is run on subsequent, non-overlapping 30-minute intervals, producing a localization estimate every 30 minutes for each solution. We slightly modify the DLQ algorithm as presented in Daniels et al. by omitting localization estimates for the 30-minute intervals that have no concentration enhancements, as these intervals likely correspond to periods of no emissions. The length of the 30-minute window was selected to balance the information content of each interval and the validity of the DLQ assumption that emission rate is constant within each interval. The 30-minute interval was found to work well on a number of different sites. Additionally, the 30-minute inversion interval used by the DLQ algorithm is comparable to what the CMS solution vendors use in practice, making it a natural choice for use in this study.