When trying to obtain the REGIONAL MATERIALS credit we are all used to thinking in the terms of 500 Miles. However, LEED allows for a "weighted average" to be used if alterative methods of shipping are utilized. The formula is as follows:
Transport by Rail : Divide the total distance by 3
Transport by Inland Waterway : Divide the total distanceby 2
Transport by Sea : Divide the total distance by 15
So... if you have product that you would love to use, but it is outside the 500 mile radius; see if you can coordinate deliery via rail by communicating with the vendor. Depending on the product, this might be their standard method anyway.
Altro, a major resilient flooring manufacturer in the healthcare and education markets has just announced that it is removing biocides and antimcrobials from its products.