From Will Hobbs (Ecology, Environmental Assessment Program, EAP)
Below is a memo which summarizes Will Hobb’s recent analysis of the stormwater PCB data collected by the City of Spokane (2012-2014). The origin of this analysis was from discussions at a Task Force meeting this past summer, where EAP volunteered to look at the PCB contributions of stormwater to the Spokane River using the City’s recent data. Will also compared this data to previous sample events by Ecology. However, it should be noted that both grab samples (Ecology) and composite samples (City of Spokane) had to be used in the analysis in order to have enough data; this obviously introduces some bias. This memo is informal and aimed at encouraging discussion prior to planning any “wet weather” sampling on the Spokane River and City of Spokane drainage basins.