I'm off for spring break this week (thank goodness), so I got my mom to take me to Mt.Vernon. I thought that this siren would go off for a minute then I would would get a two minute ambiance of the Sentry's and Model 5 in the town. To my surprise, this siren did a full 3 minute alert blast for the test.
This siren is located on the north end of Mt.Vernon, at Industrial Rd./Main St. and Seibert Ln.
Other sirens heard include 2 Sentry 10V2T's and 1 Sentry 10V in Attack. The Model 5 was not heard.