My contractor is ready to fill my loop and I have requested that he use Environol (Water Furnace product) , but he cannot find it anywhere. I am in Delaware. I am very cautious because I use well water for my house just a few hundred feet away from the loop and I cannot take any chance of a leak. He typically uses methanol. Any recommendations on where to buy Environol, or perhaps comments on my cautiousness? He can get ethanol, but I have read that generic denatured ethanol is not recommended.