Ralph,
NIOSH's page is still active, but dated. You should refer to: "ACGIH's
Industrial Ventilation: A Manual of Recommended Practice for Design, 29th
Edition" (received my copy ~1 month ago), see Tables 1-1, on page 1-4, which
gives a good example of OELs expressed in particle diameters with allowable
dust levels and a comparison to clean room standards; also see Table 13-67.1
for Nanoparticle Control Recommendations Corresponding to Potency Bands. I
am actively trying to apply the same concepts - adapting to the OSHA GHS
classifications to ensure the most hazardous compounds are used with the
appropriate engineering controls. Does the group think it appropriate to
apply the concepts to particle size, based upon aerosol deposition or can it
be expanded to the classification of exposures based upon GHS
classifications?
I would be very curious if the members have reviewed and compared control
banding with the processes identified as generating aerosols from the CDC's
http://www.cdc.gov/mmwr/pdf/other/su6101.pdf. If you are not familiar with
this resource, please review pages 4 through 14.
I have seen nothing published on the particle size distribution from the
processes generating aerosols, or infectivity rate at what level of
generation is a specific control recommended or required which sounds like a
PhD dissertation thesis to me, and one worthy of citation. I realize
individual immunity status varies, but I find it hard to believe it would
significantly alter the standard deviation from the norm of exposed
populations. Am I wrong?
We need to focus on the availability of controls, based upon exposure
potential. In my opinion, the significant increase in infectivity rate of
unreported exposure incidents, using existing controls needs to be evaluated
and compared to the potential exposure groups of other potential exposures,
e.g., standard analytical labs, biochemistry, radio-synthesis. Currently, I
am working with all of these exposure groups, up to pilot plant scale
production.
Thanks,
BruceV

-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**med.cornell.edu] On Behalf Of
Stuart, Ralph
Sent: Monday, May 2, 2016 2:53 PM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Examples of Control banding and Chemical Safety Levels

A couple of colleagues have asked for examples of how control banding and
chemical safety levels can be applied to the laboratory environment. I know
that a variety of campuses have developed such systems to address one or
more lab safety programs, so I'd like to volunteer to collect a list of
examples that I can collate into a DCHAS web page.

So if you campus has develop a control banding system that manages lab
safety issues, could you please let me know:
1. What safety aspect(s) are covered by the system?
2. How long it has been in effect?
3. A web page that describes the system?

Thanks for any help with this.

- Ralph

Ralph Stuart, CIH, CCHO
Chemical Hygiene Officer
Keene State College

ralph.stuart**At_Symbol_Here**keene.edu

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