I am looking at purchasing part of an old dairy farm in Northern VA. There are several buildings, including the dairy barn, a silo, an old pole barn, an equipment shed, etc. The equipment shed has a closed room on the end that has a sign on the door that indicates that there are farm chemicals stored inside. There are a number of 50 gallon drums in there. I have not gone in to read the labels on the drums. I will do that soon. Does anyone with dairy farm experience have any idea whether there are or were hazardous chemicals in use on dairy farms for weed control, pest control, etc.? Also, should I be concerned about the possiblity of the need for costly chemical cleanup work? THanks in advance for your advice.