The British Standards Institute and SAFENANO have published a guide to the safe handling of manufactured nanomaterials. 

"PD 6699-2:2007 Nanotechnologies - Part 2: Guide to safe handling and disposal of manufactured nanomaterials provides step-by-step guidance through the general approach to management of risks, information needs, hazard assessment, measurement of exposure, methods of control and disposal. It is intended to help manufacturers and users work with nanomaterials in a safe and responsible way." -- SAFENANO announcement

"This Published Document gives guidance on assessing risks and
recognizing uncertainties in the development, manufacture and use of
nanomaterials, and on developing and implementing an effective
strategy to address and control the risks.
It is applicable to a wide range of nanomaterials and nanostructured
materials as defined in PAS 136, including nanoparticles, nanofibres,
nanopowders, nanotubes and nanowires, generically referred to as
nano-objects, as well as aggregates and agglomerates of these materials.
It also covers any material or preparation in which such nanomaterials
comprise a significant proportion. This guide is not applicable to
incidentally" --  PD6699-2:2007, pg 1

Read Andrew Maynard's comments.

Read the SafeNano announcement. 

Download the guide.