No problem. If the process required, say, 10 chemicals that are otherwise not violations; how long would it take the US military (if they had such a program) to bring 10 chemicals from separate sites to various specific sites that also had delivery systems for wmds?
If you have 100 delivery sites, you'd need 1000 vehicles, a coordination plan, and a recipe for mixing on site, and perhaps, machinery/technology for mixing on site.