Typical Hazardous Environments: Automotive refuelling stations or petrol stations – Oil refineries, rigs and processing plants – Chemical processing plants – Printing industries, paper and textiles – Hospital operating theatres – Aircraft refuelling and hangars – Surface coating industries – Underground coal mines – Sewerage treatment plants – Gas pipelines and distribution centres – Grain handling and storage – Woodworking areas – Sugar refineries – Metal surface grinding, especially aluminium dusts and particles
What about sewage network?

How would you classify it? What about Zone 1?
Answer: correct!!!
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