Keith…

Thanks for providing the maps and spreadsheet.  One thing I noticed– there are several watercourses in the Clintonville neighborhoods covered by the map, but these areas do not seem to be called out for special avoidance.

As I’m sure you’re aware, the label for Biomist 4+4 (which is the permethrin-based product that I believe Dale said your folks would be applying) says that it should only be applied over bodies of water when weather conditions would “facilitate movement of applied material away from the water” (http://www.clarkemosquito.com/PDFs/2Label68742808.pdf).  Indeed, the EPA’s RED for permethrin-based or malathion-based pesticides used as wide area mosquito adulticides
(at http://www.epa.gov/oppsrrd1/REDs/permethrin_amended_red.pdf and 

http://www.epa.gov/pesticides/reregistration/REDs/malathion_red.pdf, respectively) seem to be the source of this restriction.

As the only weather condition that I can think of that would “facilitate movement of applied material away from the water” in our ravines would be an amazingly laminar and sustained updraft, doesn’t the labeling essentially prohibit the fogging of Bill Moose, Glen Echo, Overbrook [Adena Brook], Rush Run, and Walhalla Ravines?  All of these ravines contain permanent streams that run within inches of the nearby roadways–streams that are at the bottom of ravines and that are enclosed by solid tree canopies, creating microclimates that inhibit dispersal of any aerosols applied in their vicinity.

Thanks,
Jeff Fronz