Thanks Scott.  I'll copy your response back to the list that has been
discussing the issue.

I'm not sure which of our muctual colleagues put you in touch with me, but
thank him/her.

LaSalle Bank is one of those famous Chicago buildings, isn't it?  While I
suspect the image I'm retrieving from the recesses is of a financial exhange
building of some sort, I'm reasonably sure I know and appreciate your
building.

-jc

[log in to unmask] wrote:

> John,
>
> A colleague forwarded your question to me because we recently had a storage
> facility built.  We store a large photo collection in two climate
> controlled vaults.  One vault is 60 degrees and 40 percent humidity while
> the interior vault is 40 degrees and 40 percent.  The coldest vault is
> basicly a pre fab metal-clad panel walk-in style industrial
> refrigerator/meat locker unit within the larger warmer vault which is
> simply a heavily insulated room( all walls, ceiling and floor have extra
> insulation installed) .  I would suggest using the pre fab material
> whenever possible to maintain a seal on the humidity level.  Temp. is not
> really a problem but himidity is very hard to control.  We used a local
> contractor that has done work for a local museum.  I would suggest
> contacting a local museum or maybe the Northeast Document Conservation
> Center www.nedcc.org.  They might be able to give you more specifics.  The
> best published source I know of is Henry Wilhelm's book The Permanence and
> Care of Color Photographs Preservation Publishing Company, Iowa. Chapter 20
> is dedicated to storage vaults for photography collections.  If you have
> any other questions please feel free to contact me.
>
> Scott Dietrich
> LaSalle Bank
> Chicago, IL