@JamesJenkins I went ahead and answered (as you've noticed) after doing some reasearch. Looks like Quinclorac is going to be the biggest problem. Good luck talking to your neighbor!
Actually I was making a mistake - fixed now. I have 104/500, so less than 1/4.
Random fact: User Luiz Borges has asked 4 questions, only three of those have an accepted answer. Those three answers also happen to be posted by user OrganicLawnDIY.