Gordon, Some good highlights and ongoing questions Gordon. Our upcoming conference speaker has some comments in this pdf.
John Martyn, Consulting Arborist
JPM Tree Service
Interesting discussion about using crumb rubber in soils. First, are there potential negatives? - possible I can think of: They have been discussed as possibly a cancer agent for youth playing on the play fields
Jason, I wonder about the addition of crumb rubber into the soil, as a possible pollutant (any data on potential leaching etc..?). I think I would rather compare the cost of annual de-compaction into the CRZ via vertimulching using Airspade(r) ...