That would match up pretty good with what I saw with my lag, 64x~104(one alchemical bag) stacks ~ 4000 items on the floor, Is this with BC pipes?
one server we have a 3 huge quarries, which take a while to give any ores but when they do oh boy. I also put in a system where the three quarries feed a condenser right next to the quarries these make wood or if you have a lot then you could put something like redstone, that way it reduces the amount of items flying around - this depends on how much EMCing you want to do. these then feed into another condenser that makes something more valuable normally diamonds.because ore doesn't get EMCed you dont lose that and can send it straight to a processing plant, if you want to keep a specific item, eg uranium or diamonds then you can just run a by pass with a filter pipe, also these can fill up the pipe with excess blocks the oposite that you are trying to achieve.