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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"
                      face="Times New Roman">*************************************</font></div>
                  <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>
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                      font-size:medium; color:rgb(128,128,128)"><br>
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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">&lt;nhcoll-l-bounces@mailman.yale.edu&gt;</a> on behalf of Ann
              Bogaerts <a class="moz-txt-link-rfc2396E" href="mailto:ann.bogaerts@plantentuinmeise.be">&lt;ann.bogaerts@plantentuinmeise.be&gt;</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>
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            <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
                                          face="verdana, sans-serif"
                                          color="#3d85c6">Ann Bogaerts</font>
                                        <div><span
                                            style="background-color:rgb(255,255,255)"><font
                                              face="verdana, sans-serif"
                                              color="#3d85c6"><br>
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                                        <div><span
                                            style="background-color:rgb(255,255,255)"><font
                                              face="verdana, sans-serif"
                                              color="#3d85c6">Scientific
                                              manager Herbarium BR</font></span></div>
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                                              face="verdana, sans-serif"
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                                        <div><span
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                                              face="verdana, sans-serif"
                                              color="#3d85c6">Botanic
                                              Garden Meise</font></span></div>
                                        <div><span
                                            style="background-color:rgb(255,255,255)"><font
                                              face="verdana, sans-serif"
                                              color="#3d85c6">Nieuwelaan
                                              38</font></span></div>
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                                              face="verdana, sans-serif"
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                                              Meise</font></span></div>
                                        <div><span
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                                              color="#3d85c6">++32 2 260
                                              09 57</font></span></div>
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                                        <div><font face="verdana,
                                            sans-serif"><b
                                              style="font-size:large">Gelieve
                                              voortaan mijn nieuw
                                              e-mailadres te gebruiken: </b><font
                                              size="4" color="#000000"><a href="mailto:ann.bogaerts@plantentuinmeise.be" target="_blank" moz-do-not-send="true">ann.bogaerts@plantentuinmeise.be</a></font></font></div>
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      <pre wrap="">_______________________________________________
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    <p><br>
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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
Dirk Neumann, Section Ichthyology / DNA-Storage
Muenchhausenstr. 21
81247 Munich (Germany)

Visit our section at:
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