After you have slected a particular location for a TC string installation on the streambed, begin by driving the McNamara drive bar and sleeve into place using the fence post driver.
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After you have reached a sufficient depth (by measuring the penetration depth and subtracting from the bar length), remove the drive bar from the sleeve using a large pipe wrench.
After the bar has been removed, carefully snake the TC string down into the sleeve. Check to be sure that the "reference mark" on your TC string wire is exposed and is in the proper place with respect to the end of the sleeve.
This is the most delicate part of the installation, and it requires 2 or 3 people to be accomplished well. You will now need to use the large pipe wrench to twist and pull the steel sleeve out of the streambed. Someone should hold the TC string in place while another (or 2) coax the sleeve out. We have found that slow progress is made at first, then it seems to speed up the further out the bar is. REMEMBER you will have to pull all of the TC wire through the sleeve, so be very careful guiding the rest through.
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You will want to measure the distance from the streambed where the TC string is inserted up the TC string to your "reference mark". The installation depth of the deepest TC is the length from that TC to the reference mark minus the length you measure above the streambed. All other TC locations can be computed similarly. Record all of these distances. Now you can connect the TC leads to the multiplexer.
Fianlly, you need to secure the TC strings as the wire has to get back to the streambank. Carefully place the wire under rocks to secure it, and use duckbill anchors if necessary.