HPA plants are put together with off the shelf equipment,  in the grans scheme of things, look at how long this has taken to go from a commercial pilot plant to what is just about to be put into production. If they want 2 more HPA plants in 2013, they have already alerted the suppliers and will be giving the go ahead after the  first few runs of material throught the acid recycler and new calcination furnace.........IMO