We have 2 GE Frame 6B dual fuel DLN1 combustion turbines with MARK V controls. Question I have, can some one explain what takes place during the "bottle" test of the SRV and the GCV? We have a vent valve between the two valves and it operates correctly. We do not get an alarm at this time. We did previously and this was because of leaking on the SRV. It was repaired, alarm gone. Our SRV and GCV are two separate valves. Main concern is the GCV getting tested for this test or is the concern leakage by the SRV?