I am only about 10 miles south of kenmore. I have not heard a peep on their new P25 system at all.
Do you drive? If so, go 10 miles North and see if you pick them up. Also, do you have any of the filters on in the SDS?
Currently doing a custom 3 at 465.500 and custom 4 at 460.500. This should pick up any broadcast on these 2 frequencies and still not hearing anything
For 465.500, pretty sure you would need to be close to the tx'ing radio.