Vents location according to drawing / legal req. (reference site hazardous zones)
Verticality of vent stack and height per specification
Proper vent caps installed - MOGAS where stage 1b vapour recovery is required (use PV valves) and rain caps for where stage 1b vapour recovery not required. AGO - use rain caps
Earthing installed
Vents located closer than 1 m from roadway adequately protected by bollards
For where PV vents are installed - ensure easy riser systems are adopted