Underground Petroleum Storage Tanks and Related Wastes - Code ...

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22 Transport and Disposal of Petroleum Storage Tanks Separation distance required for tanks in storage prior to gas-freeing 10 metres 10 metres Storage area for tanks awaiting disposal to maximum of 500,000 litres Storage area for sludge in drums 10 metres 10 metres 15 metres 15 metres U/G water run-down tank (50,000 litres) A/G water tanks 2 x 50,000 litres Disposal pad Sludge trap 15 metres 15 metres Separation distance required while a tank on the disposal pad is being gas freed Pump house changing room and shower for tank cleaners Security fence all round 2.4 metres high Security fence all round 2.4 metres high Storage area for non-dangerous and non-toxic materials, etc. e.g. - used tanks following gas freeing and cleaning, - scrap materials following cleaning, - new tanks, - equipment. Roof over walkway Wet weather clothes 8000 security gate Boundary line Locker room Toilet/washroom Lunch room Office Services: Sewer Stormwater Water Electric Phones, etc Fig. 1 Typical Tank Disposal Site Layout
In addition, any person entering a confined space must wear safety harness and safety rope, and be attended by a second person watching over him/her from outside the tank, with breathing apparatus at hand. At least one other person must be available, within call, to assist should it be necessary. A Confined Space Entry Permit is shown in appendix 10. 11.13 Tank Cleaning Once entry has been gained, the tank should be cleaned internally of any remaining waxes and sludge. The external surfaces should also be cleaned in preparation for cutting into manageable sections. Continue to cut the tank steel into appropriately sized sections for subsequent removal to an approved furnace operation for melting down. The internal surfaces of the tank should only be handled when wearing gloves. Additional protection such as a barrier cream applied to the hands may also be used. 11.14 Scrap Tank Materials Scrap steel cut from the tank must be flame cleaned or grit/shot blasted as set out in Octel Instruction Publication No. 5-01/92, before being released from the site. Any scale generated by cleaning operations and any other scrap materials from the tank must be collected and treated as hazardous waste. All storage, movement and disposal of scrap materials must be documented, as for hazardous wastes. See section 12: Treatment and Disposal of Hazardous Waste. 12. TREATMENT AND DISPOSAL OF HAZARDOUS WASTES 12.1 Responsibility and Legal Requirements It is mandatory for all parties involved in the cleaning of petroleum tanks to ensure that the disposal of the residual hazardous wastes, e.g. leaded sludge and scale, or scrap tank materials, is not in breach of local or central government regulations applicable in the area where the operation is taking place. Compliance with these requirements is the responsibility of the contractor. 12.2 Description of Leaded Petroleum Sludge The residue remaining in leaded petrol storage tanks after all recoverable petrol has been removed consists of liquid and solid matter. It is poisonous. Any tank that has been used to store leaded product at any time must be considered a lead hazard. All lead compounds are toxic, and organic lead compounds are particularly poisonous. They can be absorbed by breathing the vapour or dust, by swallowing dust or dirt from face or hands, or by direct absorption through the skin. The liquid consists of two phases: • Water containing dissolved lead salts and some organic matter; and • Hydrocarbons floating on the water. The solids, formed mainly by the rusting of the steel tank, consist of a mixture of iron oxides, water, petrol and, inorganic and organic lead compounds. The following is a typical analysis: Transport and Disposal of Petroleum Storage Tanks 23
Page 1 and 2: Code of Practice for the TRANSPORT
Page 3 and 4: CONTENTS 1 Objective 4 2 Summary 4
Page 5 and 6: 5. SCOPE 6. DEFINITIONS To ensure t
Page 7 and 8: Inspector, Inspectors of Dangerous
Page 9 and 10: 7.2 Permits, Regulations and Standa
Page 11 and 12: - Current Dangerous Goods Licence c
Page 13 and 14: contained in the Code of Practice f
Page 15 and 16: Refer to appendix 1. The principal
Page 17 and 18: not fitted with a dropper pipe unle
Page 19 and 20: 11.7.3 Personal Protection Workers
Page 21: 11.5 above). This in turn determine
Page 25 and 26: Since the principal toxic hazard of
Page 27 and 28: - Transit insurance — the load (i
Page 29 and 30: 15.13 Fire Fighting Equipment At le
Page 31 and 32: 17. SAFE HABITS provide backup assi
Page 33 and 34: Transport and Disposal of Petroleum
Page 35 and 36: 2. Tank approved gas tight Contract
Page 37 and 38: APPENDIX 3B WASTE DISPOSAL REGISTER
Page 39 and 40: APPENDIX 5 TANK DISPOSAL NOTICE AND
Page 41 and 42: APPENDIX 6 SAFE HANDLING OF PETROLE
Page 43 and 44: Petroleum Fire • Use dry powder,
Page 45 and 46: APPENDIX 8 CONFINED SPACE ENTRY PER
Page 47 and 48: • Not cleaning PVC suits immediat
Page 49: 5. Experience in Underground Petrol

Underground Petroleum Storage Tanks and Related Wastes - Code ...

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