All radio transmitters turned off ?
Radioroom locked and key held by Drilling Supervisor ?
All hand held transmitters off and locked away ?
All vehicle radios off and doors locked ?
Are there any large commercial transmitters nearby ?
Are all electric welding machines electric isolated ?
Are all personnel aware of ‘no welding’ ?
Is logging unit grounded to wellhead ?
Has potential difference between rig and logging unit been checked ?
Have road signs been installed 500ft from location warning of radio silence in progress ?
Have signs been installed around the work area warning of hazardous operation?
Are all non essential personnel instructed to keep clear of explosives ?
Is weather suitable ie., no electric / dust storms ?
Has a safety meeting been held ?
Have other locations been advised of impending radio silence and its duration ?
If perforating under drawdown, is all production equipment tested and operational ?
If H2S is expected, have all precautions been taken ?
If kill fluid available and ready for pumping ?
Is firefighitng equipment ready ?
Is the arming key held by the Logging Engineer ?
Has a hot work permit been completed and are all precautions adhered to ?
Is fork lift truck out of use ?