No, they aren't. Quite the opposite.
Plus.........if it isn't a chemical weapons plant of some type, why was it A) heavily camouflaged to blend in with the surrounding desert, B) surrounded by heavy barbed wire, C) guarded by over 30 Iraqi troops, D) ringed by aging barracks........barracks, as in the places where soldiers bunk, and D) run by a general officer?
Oh yes.....and do chemical workers routinely "surrender"?
Think Dow Chemical, Iraqi branch just got a wild hair one day?
Well, could it perhaps be some place that manufactures military explosives or fuels? You might hide and guard such a place as well. I dunno. I'm just reluctant to conclude that it truly is chemical weapons facility until we've got solid confirmation, and I suspect its going to be awhile before we get that.