<br><font size=2 face="sans-serif">Mark, Dave and All,</font>
<br>
<br><font size=2 face="sans-serif">Hi Dave! Hope all is well!.</font>
<br>
<br><font size=2 face="sans-serif">The epoxy is a 3M structural plastic
adhesive called "DP-8005". There is another version called DP-8010
which has a different setting time but all else being almost the same.
It has good strength and is specifically designed for polypropylene, polyethylene
and even Teflon amazingly. As far as I know there is <u>no other option</u>
when gluing these types of plastics. </font>
<br>
<br><font size=2 face="sans-serif">As Mark was saying this new style vault
and the so called "McMillan" vault were designed for different
situations. The "McMillan" style is the ANSS backbone network
vault. Accessibility is a requirement at these sites, and the smaller vault
that Mark and I have conspired on which uses the smaller barrel with the
glass bottom, would be better suited for remote applications where
materials have to be backpacked in. Ideally it should be used at locations
where the geology is good. In poor soils the "McMillan" style
has noticeably better long period response.</font>
<br>
<br><font size=2 face="sans-serif">Regards,</font>
<br>
<br><font size=2 face="sans-serif">John</font>
<br>
<br><font size=2 face="sans-serif">John R. McMillan<br>
U.S. Geological Survey<br>
Advanced National Seismic System<br>
Golden, Colorado<br>
303-273-8470 (office)<br>
303-570-7403 (mobile)<br>
303-273-8450 (fax )<br>
mcmillan@usgs.gov</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">Mark E Meremonte/GD/USGS/DOI</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">"David S. Croker" <croker@usgs.gov></font>
<tr>
<td valign=top><font size=1 color=#5f5f5f face="sans-serif">Cc:</font>
<td><font size=1 face="sans-serif">John R McMillan/GD/USGS/DOI@USGS, Nathan
L Edwards <nedwards@unr.edu>, ANSS NetOps <anss-netops@geohazards.usgs.gov></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">04/14/2010 05:51 PM</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">Re: [ANSS-netops] Vaults and ARRA upgrade
stations</font></table>
<br>
<hr noshade>
<br>
<br><font size=2 face="sans-serif">Hi Dave & Nathan,</font>
<br>
<br><font size=2 face="sans-serif">John McMillan, Can you give them
the type of epoxy we used?</font>
<br>
<br><font size=2 face="sans-serif">The pressure gauge was used to verify
the 2 psi the o-ring on the lid was rated for and to test a seal John is
working on for the cable entry. John has a cool cable entry seal
he is designing that has two plates which sandwiches a sealant material
(duct seal in our case for testing purposes; hope to find a better
material) and forces it around the cables and up against the inside of
the conduit to form a water/air tight seal. In our test we did it
without the cables, vault full of water, and pumping 2 psi into the system.
Have not seen one leak yet, but I have not been back
to check since none of these 3 installations have indicated problems to
warrant a return. All have been in since mid-august 2009 and have
over-wintered well thus far. Maybe the melting season of Spring
may tell differently but not yet. Keep track of the PDFs at IRIS
DMC. They will tell us if troubles crop up.</font>
<br>
<br><font size=2 face="sans-serif">The glass base protrudes out beyond
the base of the barrel and that protrusion is utilized to help anchor/couple
the vault to the concrete. So, yes, I pour 2-4 inches above the
lip on outside of the vault. Below the vault the amount of concrete
used depends o the hole. However, we used 6 80-lbs bags
of concrete: 4 in the hole, place the vault, 2 above the lip &
around the whole edge. I did not use re-bar, if a larger diameter
hole then I use re-bar.</font>
<br>
<br><font size=2 face="sans-serif">Both this vault "remote style"
(or other name which I have not thought of yet) and the McMillan
have their place. We did use the remote style at our site at TPNV
on top of the mountain at NTS where difficult to get concrete truck up
to for McMillan style.</font>
<br>
<br><font size=2 face="sans-serif">Finally, you asked about weight of saturated
soil and plus snow on top. The Idaho sites averages 12-15 of snow
according to forest service. Because this salvage drum is smaller
then the big ones for McMillan, the sides are thinner and lid less strong
even though it is ribbed as you can see in photos. I am not worried
at all about the sides because I use sand to backfill around the vault.
The sand acts as a nice buffer between the vault and angular rocks
that may be present around the edge which may break off and eventually
(or possibly) dig into the side over time; and the sand distributes the
forces around the vault evenly giving the sides more strength; and the
sand helps couple whole system to Mother earth. Now the lid, it can
depress with enough force. So, I worried about that as well.
So, I placed a strong 1 inch thick, computer room false floor tile over
it. I am still looking for something other to replace the tile that
will be strong, lightweight, and will not deteriorate (or rot) over time.
I have not found that yet and we had lots of these unused floor
tiles. </font>
<br>
<br><font size=2 face="sans-serif">Maybe I am too honest here but there
you go. Welcome comments and ideas for strengthening the lid. The
salvage barrel worked out well because it is lightweight and it comes with
the o-ring. This is what I was after in the prototype I showed at
the last netops meeting. I was against the salvage drum at first
because of the thinner sidewall but the sand has remedied that problem.</font>
<br>
<br><font size=2 face="sans-serif">Hope this helps in deciding what to
do on vaults. I know Memphis has their design which I should take
another look at as well. They have all that saturated, thick Miss.
muds. I think this system would work well there too but I should
would like to test it. However, the Idaho site may do the testing
for me as the snow melts and the water has no where to go but stay on top
because it does not absorb into the granodiorite there this vault is embedded
in.</font>
<br>
<br><font size=2 face="sans-serif">Enough, good night!</font>
<br>
<br><font size=2 face="sans-serif">Mark</font>
<br>
<br><font size=2 face="sans-serif">******************************************************************************<br>
Mark E. Meremonte Geophysicist
USGS/ANSS/NEIC<br>
<br>
U.S. Geological Survey Work: 303-273-8670 Cell:
303-478-5766<br>
MS 966, Box 25046 Email:
meremonte@usgs.gov<br>
Denver, CO 80225
Web: </font><a href=http://geohazards.cr.usgs.gov/><font size=2 face="sans-serif">http://geohazards.cr.usgs.gov</font></a><font size=2 face="sans-serif"><br>
<br>
Ship: U.S. Geological Survey, 1711 Illinois St., Golden, CO 80401<br>
******************************************************************************</font>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">"David S. Croker" <croker@usgs.gov></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">Mark E Meremonte <meremonte@usgs.gov></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">04/14/2010 00:03</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">Re: [ANSS-netops] Vaults and ARRA upgrade
stations</font></table>
<br>
<hr noshade>
<br>
<br>
<br><font size=3>Hey Mark,<br>
<br>
I'm glad you responded. You and John seem to be ahead of the curve
on vault design. I like the smaller overpack barrel size of that
version. Do you mind answering a couple of questions?<br>
<br>
1) what kind of epoxy do you use between the barrel and the glass?<br>
2) you have a picture of the pressure gauge...what sort of pressures does
it hold? Have you seen one leak yet? I would be worried about
what static pressures it could hold in the real world, like that Idaho
site. What happens when you get the weight of saturated soil and
8 feet of snow on top?<br>
3) from the one install picture, it looks like you submerge the outside
rim of the glass plate in concrete by a few inches. True? How
much concrete do you have below the glass plate?<br>
4) are you guys moving to that style only and away from the so-called McMillan
vault?<br>
<br>
Glad to hear you are on the warpath to cellular service. Let me know
if I can help further. Say hi to John for me if you see him.<br>
<br>
Cheers!<br>
Dave<br>
<br>
At 04:27 PM 4/13/2010, you wrote:<br>
</font>
<br><font size=2>Nathan,</font><font size=3> <br>
</font><font size=2><br>
I cannot recall exactly what that *.ppt file showed but I think it showed
various vaults tested at ASL including a smaller style vault for, what
I called, "remote style". In any case, since then John
McMillan and I have designed a vault system with a glass base using an
off-the-shelf salvage drum that has a lid with an o-ring and using a PVC
bulkhead fitting for cable entry. This vault is similar to one I
showed at last NETOPS meeting where it was used as a table and/or chair.
See photos of our mockup at </font><a href="ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum"><font size=2 color=blue><u>ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum</u></font></a><font size=2>
and see an installation for the station PLID (Pearl Lake, ID) at </font><a href="ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum/Installed_PLID_Photos"><font size=2 color=blue><u>ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum/Installed_PLID_Photos</u></font></a><font size=2>
.</font><font size=3> </font><font size=2><br>
<br>
As for response of the system see IRIS PDF plots for PLID at </font><a href="http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=PLID&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW"><font size=2 color=blue><u>http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=PLID&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW</u></font></a><font size=2>
. This vault is installed in the Idaho Batholith using a CMG3-ESP
and a MEMS.</font><font size=3> <br>
</font><font size=2><br>
Also, we installed the same vault and seismometers at stations FXWY and
REDW in IW network. FXWY is in an old limestone quarry and REDW is
on a couple meters of fine-grained clay soil mixed with boulders on a limestone
ridge. The PDF plots plotted for same period of time as for PLID
above are at:</font><font size=3> <br>
</font><font size=2><br>
FXWY: </font><a href="http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=FXWY&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW"><font size=2 color=blue><u>http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=FXWY&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW</u></font></a><font size=2>
<br>
REDW: </font><a href="http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=REDW&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW"><font size=2 color=blue><u>http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=REDW&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW</u></font></a><font size=2>
</font><font size=3><br>
</font><font size=2><br>
Mark</font><font size=3> </font><font size=2><br>
******************************************************************************<br>
Mark E. Meremonte Geophysicist
USGS/ANSS/NEIC<br>
<br>
U.S. Geological Survey Work: 303-273-8670 Cell:
303-478-5766<br>
MS 966, Box 25046 Email:
meremonte@usgs.gov<br>
Denver, CO 80225
Web: </font><a href=http://geohazards.cr.usgs.gov/><font size=2 color=blue><u>http://geohazards.cr.usgs.gov</u></font></a><font size=2>
<br>
<br>
Ship: U.S. Geological Survey, 1711 Illinois St., Golden, CO 80401<br>
******************************************************************************</font><font size=3>
<br>
<br>
</font><font size=1 color=#5f5f5f><br>
From:</font><font size=3> </font><font size=1>Nathan L Edwards <nedwards@unr.edu></font><font size=3>
</font><font size=1 color=#5f5f5f><br>
To:</font><font size=3> </font><font size=1>"anss-netops@geohazards.usgs.gov"
<anss-netops@geohazards.usgs.gov></font><font size=3> </font><font size=1 color=#5f5f5f><br>
Date:</font><font size=3> </font><font size=1>04/13/2010 16:09</font><font size=3>
</font><font size=1 color=#5f5f5f><br>
Subject:</font><font size=3> </font><font size=1>[ANSS-netops] Vaults and
ARRA upgrade stations</font><font size=3> </font><font size=1 color=#5f5f5f><br>
Sent by:</font><font size=3> </font><font size=1>anss-netops-bounces@geohazards.usgs.gov</font><font size=3>
<br>
<br>
<br>
<br>
</font><font size=2 face="Courier New"><br>
We were wondering what other networks are doing in regards to the construction
of new vaults, broadband in particular. Maybe something along the
lines of one that Mark Meremonte covered in this presentation?<br>
</font><font size=2 color=blue face="Courier New"><u><br>
</u></font><a href=http://earthquake.usgs.gov/research/monitoring/anss/internal/ppt/vaultDesigns02.ppt><font size=2 color=blue face="Courier New"><u>http://earthquake.usgs.gov/research/monitoring/anss/internal/ppt/vaultDesigns02.ppt</u></font></a><font size=2 face="Courier New">
<br>
<br>
<br>
<br>
Nathan Edwards<br>
Development Technician<br>
Nevada Seismological Laboratory<br>
University of Nevada Reno<br>
Reno, NV 89557-0174<br>
o: 775-784-1106<br>
m: 775-303-5899<br>
f: 775-784-4165<br>
_______________________________________________<br>
ANSS-netops mailing list<br>
ANSS-netops@geohazards.usgs.gov</font><font size=2 color=blue face="Courier New"><u><br>
</u></font><a href="https://geohazards.usgs.gov/mailman/listinfo/anss-netops"><font size=2 color=blue face="Courier New"><u>https://geohazards.usgs.gov/mailman/listinfo/anss-netops</u></font></a><font size=3><br>
<br>
<br>
_______________________________________________<br>
ANSS-netops mailing list<br>
ANSS-netops@geohazards.usgs.gov</font><font size=3 color=blue><u><br>
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<br>
<br>
<br>