I wouldn't think it will drift very far if only 2 ft off the ground. What style tips you use can make a big difference. Flat fans will drift more than some others that have a bigger droplet size. You could always add a drift control agent if you were worried about it.2 foot high and 10 gallon is what the guy spraying said? Not my expertise
I wouldnt worry at all at that distance.It sounds like 15 or 20 foot should be no problem then...thanks!