The incident in Ludhiana where at present 11 people ae dead and many more are hospitalized due to Hydrogen Sulphide (H2S) poisoning which came out of the indutrial sewer drain should be an eye openers for us, especially for our sector of 21 and 25 in Jal Vayu Vihar, Noida. The industrial drain runs right next to our boudary wall of both sectors, which is being covered now.
Hydrogen Sulphde is a colorless, heavier than air, smells of rotten eggs, extemely toxic and flamable gas. As per report all the persons in Ludhiana within 50 meters of gas leak just coolapsed and died meaning the ppm level (parts per million) in the air of that area upto at least 50 meters from leak point was aboove 1000 ppm. 1% of the gas will amount to 10,000 ppm. If the concentration is 1 ppm then one can detect with smell , at 10 eye irritation starts, at 27 strong unpleasenrt odor. at 100 coughing, eye irritation start and loss of smell within 2 to 15 minutes, at 500 loss of consciouness , above 700 death may occur within 3 to 5 minutes and above 1500 ppm immediate death.
This gas effects one's olfactory nerves, lungs, eyes and brain. The immediate response in the affected area should be to put on the escape mask as normal mask will be of little help. Hold your breath and move upwind if release is downwind or move crosswind if release is upwind. and try to get away from the area. As it is heavier than air then climbing to a higher height in a high rise building may help. Do not try to help other but instead get away from the affected area and call emergency response. Exposure of 100 ppm are to be considerd as immediately dangerous to life and death. 100 pppm if converted to percentage will amount to0.0001% by volume.
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