accidentally posted this in MR4 - "this is my first time inputting into LeedOnline - as I cannot find interactive help on that site - I have no idea what to put in the columns where the extraction distance cannot be determined - do I leave it blank? do I put >500 ? Thanks for the help. BTW, the LEED AP I'm working with says the subcontractors MUST provide the extraction distance - but quite a few cannot and I've also determined many cannot. ??