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Safety and environmental standards for fuel storage sites
Final report
189
Critical elements of the risk control system:
water draw-off;
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effective tank repairs;
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tank inspection as per expected frequency;
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microbial growth management;
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record retention/management;
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coated tanks – damage and necessary repair.
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Potential leading indicators:
number of water draw-offs carried out to schedule;
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number of tanks exceeding the scheduled tank inspection interval.
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9 High pressure in terminal pipework during pipeline delivery
System outcomes:
terminal pipework not exceeding ~5 to ~10 bar during pipeline delivery. (High pressure alarm
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on SCADA at 12.5 bar – recorded in computerised event log. Can set analogue alarm/
indication on terminal control system.)
Potential lagging indicators:
number of deliveries where terminal pipework pressure exceeded (5 bar) during pipework
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deliveries.
Critical elements of the risk control system:
alignment of valves – logic interlock;
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control valves;
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competence of staff;
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maintenance of safety critical instrumentation – surge protection/interlock logic/control valves;
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‘Station Not Ready’ interlock.
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Potential leading indicators:
number of job observations undertaken of terminal staff carrying out management of pipeline
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delivery/terminal distribution activities (tell me/show me) undertaken on time (more frequent
for newly recruited staff);
inspection and maintenance of ‘Low MV signal direct’ control loop carried out to schedule.
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10 Static discharge
System outcomes:
no static discharges in tanks or road tankers.
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Potential lagging indicators:
number of static discharges – not detectable.
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Critical elements of the risk control system:
earth permissive system;
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loading procedures – no splash loading;
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incorrect filters installed;
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incorrect design of equipment – tank nozzles/pipework;
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