There is a local food processor down the way from our office and we bought them to get rid of some contaminated dirt. Turns out the oil that was contaminating the dirt was biodegradeable and did not have to be removed.
The barrel has apple juice labels on it.
I dont think the barrel has to be food grade, you just got to make sure there was nothing hazardous to your health put in it. Therefore, it is safer to go with barrels that stored food products.
Wannabe BBQ Illuminati