Biodiesel at T&T Auto in Richfield

I have been filling up at Richfield all this summer with the B99.  Does anyone know what the plans are with the biodiesel supply as we head into the colder weather?  I'm hoping the station will keep selling B20 through the winter.  I should be over there in the next few days or so to fill up again, so I will try to ask the attendant if they know what the deal is when I am there.Dan.