Ah! Now looking at http://image-store.slidesharecdn.com/9b958f34-f0a1-4f1e-8cfb-94bdc987d98f-large.jpeg shows the floor in much more detail, the earlier pictures I had seen seemed to make the floor area look almost like pristine brand new even after supposedly having had all that equipment moved into place !

Thanks for the links mohamedtarmohamed