Tuesday, June 12, 2012

Le field.


A show-and-tell yesterday left me out in the field to sample without Katie's supervision - a test to defy steep learning curves under the scorching heat? Perhaps.

So George and I went to site numero 5 to sample both the borehole (called Baby Deep?) and trench.

Machete was left out of this, for a very good reason only known by the team. Even though by the end of the sampling, both of us mutually agreed on its uselessness anyway. For now, at least.

So the bubbles that witheld the team yesterday was long bygone, the solution in which Fiona will be happy to hear. (but to Katie's slight dismay)

Sampling the trench was easy - lower dipmeter attached to pipes leading to flowthrough cell with three probes stuck on it and to a pump at the other. I am thinking of building a Y-shaped wood to allow low flow pumping out of the middle of the trench instead of its side, to minimize organic debris into the flowthrough cell, lest it'd mingle with the Conductivity, pH and DO probes.


Then, comes sampling the Baby Deep borehole. That went very well the first 5 minutes, until (what I thought) it went chaotic. The conductivity went 'crazy', going up 1 microS/cm per second to well over 100microS/cm!

It could be a conduit flow, where the recharge of the groundwater at depth came from a isolated saline source?


ERRATIC BEHAVIOUR! ARGHHH!!!
[Yes I have the tendency of treating my fieldbooks (since Year 1) as my diary]


Anyway, we are going to pick some chemicals up (12M of acid of 37% concentration =s) from Daquin, a Bahamian local so we can do proper geochemical work tonight.

Wee :)


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