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Diesel Tank survey work

1. Permit to work system- Confined space is identified as a tank previously contains diesel and height is 20

meters.

2. A proper evaluation of risks and hazards need to be done on site.3. All personnel who involved the work must have experience and training (entrant,

attendant, supervisor, confined space assessor, rescue personnel.

Confined Space Assessor to certify fit for entry.

4. Remaining residual oil must be drain out.5. Gas check must be performed before enter the tank.

- Oxygen deficiency and enrichment.- According to diesel SDS, diesel vapour, naphthalene, xylene, nonane, benzene,

hydrogen sulphide could be presence.

- Carbon monoxide could be presence (near generator, drive way, exhaust outlet,etc.)

6. 4 in 1 multi gas detector and Toxic gas detector tube have to be used with extensionhose, probe and pump.

7. If Gas meter extension hose or probe cannot be reached sample area, wear fullbreathing apparatus and enter into awkward places to gas check.

8. Always test the air at various level to be sure that the entire space is safe.9. Oxygen (O2) 19.5% to 23.5%

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21.Personal Protective Equipment must be used.- Safety glasses, Safety shoes, helmet, safety harness, Chemical resistance clothing

and glove, etc.

22.Communication devices must be used ( such as walkie talkie )23.Maintain adequate ventilation at all times.24.After leaving the tank, ensure all personnel left the place.