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<div class="moz-cite-prefix">Dear Ann,<br>
<br>
our collection is completely subsurface, too. During construction,
groundwater issues became evident as Lex described, thus the
complete building sits in a big concrete trough that shelters
collections against groundwater and groundwater pressure.<br>
<br>
The other thing is that the deepest point is inside the building.
It is constructed in a way that all surface water (mainly rain)
runs together inside the building in a big pump sump. All window
or door openings are either well above ground level or protected
with canals to avoid flooding during heavy rain events (Munich is
notorious for such incidents - but luckily so far no problems).<br>
<br>
Other issues with malfunctioning climate control systems can be
condensation issues on cold floors in the 2nd ground level storage
area when too moist air is delivered into the storage area.
Shutting air supplies off in this case is a proper emergency
measure.<br>
<br>
Apart from this, the advantages dominate (slow fluctuations, lower
costs for climate control systems, etc.).<br>
<br>
Hope this helps<br>
Dirk<br>
<br>
Am 23.10.2017 um 17:30 schrieb Alexandra Snyder:<br>
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<p>Ann,</p>
<p><br>
</p>
<p>Although my own experience has been with facilities that are
partially or fully underground, used for collections of
fishes conserved in jars and tanks, there are some conditions
that I have noted over the years. </p>
<p><br>
</p>
<p>First, over the past years, there have been improvements in
construction methods for such facilities and if the
construction company is doing their job, they will be using
moisture barriers and materials that keep walls and floors
dry. Secondly, such facilities are great for controlling
temperature and UV exposure. Controlling humidity depends on
where you live and the facility system in place to control RH
and other environmental factors.</p>
<p><br>
</p>
<p>However, these subterranean rooms are closer to groundwater
tables and the building's external water pipes that may be
buried nearby for landscaping. Both can add to problems with
seeping water at floor and wall levels. If the upper floors
of the museum experience a catastrophic water or fluid spill,
the lower levels will also experience the effects. At three
different facilities, where I have managed collections of
fishes in jars, I have maintained those collections in
subterranean rooms of the museum, i.e., below the DRY
collections, for the specific purpose of avoiding damage to
dry collection in the event of major spill from fluid
preserved collections. </p>
<p><br>
</p>
<p>Lex</p>
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<div style="font-family:Tahoma"><font size="3"
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<div><font face="Times New Roman"><span
style="font-size:medium"><font color="#808080">Alexandra
M Snyder,
</font></span><span
style="color:rgb(128,128,128); font-size:medium">Collections
Manager-Fishes</span></font></div>
<div><font size="3" face="Times New Roman"
color="#808080">Museum of Southwestern Biology
MSC03-2020</font></div>
<div><font size="3" face="Times New Roman"
color="#808080">University of New Mexico
Albuquerque NM 87131</font></div>
<div><font color="#808080"><font size="3" face="Times
New Roman">PH./FAX 505.277.6005
<a class="moz-txt-link-abbreviated" href="mailto:amsnyder@unm.edu">amsnyder@unm.edu</a></font></font></div>
<div><font color="#808080"><font size="3" face="Times
New Roman"><br>
</font></font></div>
<div><font color="#808080"><font size="3" face="Times
New Roman">PHYSICAL ADDRESS FOR FEDEX/UPS</font></font></div>
<div><font color="#808080"><font size="3" face="Times
New Roman">Bldg.83 Room 204</font></font></div>
<div><span style="font-family:'Times New Roman';
font-size:medium; color:rgb(128,128,128)">302 Yale
Blvd NE</span><br>
</div>
<div><span style="font-family:'Times New Roman';
font-size:medium; color:rgb(128,128,128)"><br>
</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:nhcoll-l-bounces@mailman.yale.edu">nhcoll-l-bounces@mailman.yale.edu</a>
<a class="moz-txt-link-rfc2396E" href="mailto:nhcoll-l-bounces@mailman.yale.edu"><nhcoll-l-bounces@mailman.yale.edu></a> on behalf of Ann
Bogaerts <a class="moz-txt-link-rfc2396E" href="mailto:ann.bogaerts@plantentuinmeise.be"><ann.bogaerts@plantentuinmeise.be></a><br>
<b>Sent:</b> Monday, October 23, 2017 7:26 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:nhcoll-l@mailman.yale.edu">nhcoll-l@mailman.yale.edu</a><br>
<b>Subject:</b> [Nhcoll-l] conservation collections</font>
<div> </div>
</div>
<div>
<div dir="ltr">Dear all,
<div><br>
</div>
<div>We wonder if there are institutes who preserve there
collections underground? If so what are the difficulties
and what should we bear in mind when building
underground floors to keep herbarium collections.</div>
<div><br>
</div>
<div>We are a bit hesitating because of humidity problems
and problems of climate control. </div>
<div><br>
</div>
<div>Do you have any recommendations?</div>
<div><br>
</div>
<div>Have a nice day,</div>
<div><br>
</div>
<div>Ann</div>
<div><br>
</div>
<div><br>
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-- <br>
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<div dir="ltr"><font
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e-mailadres te gebruiken: </b><font
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<pre class="moz-signature" cols="72">--
Dirk Neumann
Tel: 089 / 8107-111
Fax: 089 / 8107-300
email: Dirk.Neumann(a)zsm.mwn.de
Postanschrift:
Staatliche Naturwissenschaftliche Sammlungen Bayerns
Zoologische Staatssammlung München
Dirk Neumann, Sektion Ichthyologie / DNA-Storage
Münchhausenstr. 21
81247 München
Besuchen Sie unsere Sammlung:
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---------
Dirk Neumann
Tel: +49-89-8107-111
Fax: +49-89-8107-300
email: Dirk.Neumann(a)zsm.mwn.de
postal address:
Bavarian Natural History Collections
The Bavarian State Collection of Zoology
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81247 Munich (Germany)
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