(Travis S., Jordan V., Gerardo M.)
We connected the leak detector, Inficon UL5000, to the back the SS-500 aux cart, the leak detector was turned on and left to reach nominal operation.
We started leak checking the viewport on the -Y door, no response from the helium leak detector, but then the leak detector showed a signal when Travis sprayed the +Y door port, signal reached ~ 2.7X10^-09 Torr*L/Sec, but the signal was not fast, it moved slow but with a steady upward trend, we do have a couple of D1100999 viewports, O-ring type.  Travis stopped and we decided to bag the individual ports to leak check, after bagging the ports they were sprayed with helium and no change was noted at the leak detector helium signal.
No leak was detected above the leak detector's background of 2.0X10^-10 Torr*L/Sec.

Attached photo is the initial background.