To find out where in Story County the applicators test is offered, I'd suggest reaching out to the county's agricultural department. They should have the most accurate and up-to-date information on test locations.
I don't have the exact place in Story County for the applicators test off the top of my head. You could try looking on the county's official website or calling the relevant authorities for details.
I'm not sure exactly where in Story County you can take the applicators test. You might want to check with the local government offices or agricultural extension service for specific locations.