Where do you obtain your topsoil from?

We have a 70,000 yard stockpile that is a deposit from wind erosion on a farm that has grown wheat for the past several decades. We do not use any synthetic herbicides, pesticides, or fungicides on or near our stockpile of topsoil. The farm that the topsoil deposit was removed from is currently still one of the highest producing wheat farms in the Mead Colorado area. We do not accept dirt at random from contractors or construction sites as is the practice of many other topsoil suppliers. Our topsoil is not registered as an organic topsoil with any regulatory agency, although we do practice the standards set forth by several of them. We value and are proud of the topsoil that we utilize in our soil blends.