Sorry for submitting this as an answer, but I am new around and cannot comment, still.
Something I can think of is to do the following - I assume you want those logs to go to a Syslog server and when you receive a custom notification for that drop/deny of a specific ACL, to trigger some event - alarm, notification, email, etc.
My proposal is to add this to the end of your ACl - "deny ip X Y log", as this will generate a log record showing what has been denied by your ACL.
This should do the trick, you should be able to see logs with the name of the ACL, followed by protocol and source -> destination. Make sure you have logging enabled to level 6 - Informational, in order to see the messages generated.
Hope this helps.