Hypothetically, let's say that some local guys bag their clippings and I wanted some for my compost pile. I intend to only use it for applications on lawns. Unfortunately, the reason they bag all the time is due to a local fert and squirt company over-applying N from synthetic sources causing barely controllable surge growth. They also apply blanket applications of a three-way broadleaf herbicide. My questions: Does the leaf tissue carry any residual from synthetic fertilizer or is it of no consequence to the compost? While clopyralid or picloram are not used by any of the local companies (they are all residential applications), if they did would it matter if the compost is only to be used on lawns? Realistically, how detrimental is a selective herbicide to compost? I understand that synthetic chemicals have no place in composting so I'm researching indirect involvement and am figuring out how to best plan and test for inappropriate materials in my compost.