4-20-2017

Charcoal in scrubber was changed.  This was done to help prevent readings at the scrubber outlet when using PH3.

5-5-2017

A finer grade of charcoal was added to the charcoal in the scrubber.

5-10-2017

TGM pump stopped working during the night.  A fastener screw was sheared off and I was unable to adjust the flow at any of the points.  All points were reading low flow.  The pump was replaced with a new one, which is working fine. - NS