© 2013, Workplace Safety & Prevention Services (WSPS)
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No part of this publication may be reproduced, or stored in a retrieval system or transmitted in any
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The information contained in this reference material is distributed as a guide only. It is generally
current to the best of our knowledge as at the revision date, having been compiled from sources
believed to be reliable and to represent the best current opinion on the subject. No warranty,
guarantee, or representation is made by WSPS as to the absolute correctness or sufficiency of any
representation contained in this reference material. WSPS assumes no responsibility in connection
therewith; nor can it be assumed that all acceptable safety measures are contained in this reference
material, or that other or additional measures may not be required in particular or exceptional
conditions or circumstances.
While WSPS does not undertake to provide a revision service or guarantee accuracy, we shall be
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