Experience also shows that many operations rely on trades from different core businesses than that of the ‘remediator’. In particular, sites often rely on experts for asbestos removal, demolition of buildings, work on hydrol­ogy, management of conventional toxic waste, management of radon in buildings, the maintenance of building structure, etc. ANDRA’s agents have a duty to draw on the external expertise needed to better adress the risks that are poorly controlled or not controlled at all inside ANDRA. Again, any initial savings on these aspects can cost dearly later.