4. H2S
Properties
• Colourless gas
• Heavier than air
• Flammable (4% - 46%)
• Highly toxic
• Highly corrosive
• Soluble in water & oil
• Rotten egg smell at low concentrations
Natural sources
• Decomposition of organic materials
• Low oxygen environments
• Volcanic gases
• Natural gas
• Sulphur deposits
(PPM).
100% H2S = 1,000,000 PPM
0.001% H2S = 10 PPM
0.1% H2S = 1,000 PPM
5. Individual Factors
• DURATION : The length of time an individual is exposed
• FREQUENCY : The number of times an individual is exposed
• INTENSITY : The concentration of gas (PPM)
• SUSCEPTIBILITY : The physical state of the individual
6. <1 ppm : ROTTEN EGGS’ SMELL.
ABOVE 10 ppm: EYE IRRITATION
50 – 100 ppm
LOSS OF SENSE OF SMELL.
100-300 ppm
Headache, coughing.
Effects of H2S
7. 300 – 600 ppm :
• DIFFICULTY IN BREATHING
• LOSS OF CONSCIOUSNESS
1,000 PPM+
IMMEDIATE LOSS OF CONSCIOUSNESS
FOLLOWED BY DEATH IN A VERY
SHORT TIME.
8. Do NOT attempt rescue without full duration
Breathing Apparatus.
Immediately remove the victim to fresh air
Check for breathing – commence E.A.R. if
necessary
Check for pulse – commence C.P.R. if necessary
9. Cylinder – 15-minutes duration with 200bar
pressure (must be at least 80% full)
Sealing Problems: (Scars, Hollow temples)
Editor's Notes
This cup has a 50% chance of falling off the table & another 50% of staying there. The same way happens with the concept of safety, everyday you’ve got the chance of either falling into danger or staying safe & sound but it depends on your attitude and precaution you take.
SAFETY SHOES ARE MANDATORY.
CELL PHONES TO BE SWITCHED OFF
