A while back there was a query about conducting sampling for conservation
audits.  I forwarded the query to CoOL and got an e-mail message back from
Robert Waller, Chief of Collections/ Head of Conservation at the Canadian
Museum of Nature.  Rob has been developing methodologies for risk assessments
and suggests that you take a look at the following reference:

Waller, R., 1996. Preventive conservation planning for large and diverse
collections.  Preservation of Collections Assessment, Evaluation, and
Mitigation Strategies.  Preprints of the June 10 -11, 1996 workshop.
 American Institute for Conserevation, Washington, pp. 1-9.

I also think that the following paper (also by Rob) may be helpful:Waller,
R., 1994.  Conservation risk assessment: a strategy for managing resources
for preventive conservation.  In Preventive Conservation Practice, Theory and
Research.  Preprints of the Contributions to the Ottawa Congress, 12 - 16
September 1994. International Institute for Conservation.  London. pp. 12 -
16.

Good luck!

Wendy Claire Jessup
President and Conservator
Wendy Jessup and Associates, Inc.
210 Little Falls St., Suite 203
Falls Church, VA  22046
(703) 532-0788
(703) 532-1661 (fax)