I'm in southeast PA, close to Reading. There may be users or researchers interested, but I don't know them. I'm going to try a couple of local nurseries. Other than that I'm at a loss.
My ideal solution would be a buyer that brings a container, I load it and they haul it away.
I did put a couple of buckets in my garden. It's winter but the soil looks great
The history of charcoal in this area is that it was widely used for fuel in iron furnaces and forges. Most of them closed by 1850. The furnace I'm dealing with was successful and continued operation at a higher pace into the 1890's
Most of the furnaces used water power to drive air pumps. They were usually built into a hill. Charcoal used in a furnace had to be high grade and only larger chunks were used, or the furnace would not achieve proper heat (2500 degrees). Charcoal was generally stored in a barn. Usually built into a hill. Charcoal was loaded into the upper door and pulled from the bottom (downhill) door. That process would break up some of the charcoal. Pieces smaller than an inch and dust were discarded.
In the pile I'm dealing with, nothing larger than 1/4 inch remains. I imagine that freeze/thaw reduced the one inch pieces. There has been some intrusion of the local soil (very fine sand). Other than that it remains where it was placed over 100 years ago.
Chris