A news item mentions about suicidal death of a young lady software engineer by jumping from the 4th floor of a multilevel car parking building. What is stunning is the injury to a contract labourer as the lady fell on him during the jump.
This reminds me of an incident heard from my colleague in which a snake held by a bird flying in the sky slipped and fell on a person on the road and the person died due to snake bite.
The reasons for accidents are generally attributed to as 88% from unsafe acts, 10% from unsafe conditions and 2% from others. This type of accidents i.e injury to contractor worker or death of person on the road due to snake bite come under this 2% category.
Though we say all accidents can be prevented, it is difficult to imagine what can be done in these situations to avoid accidents. In the first case, may be, if the sidewalls of the terrace or road inside the parking building are raised to a height of - say 5 ft or more, could have prevented the person from scaling the height and protected the persons down below. But, in the second case, I do not know what can be done.
Such situations, even if brought out by any safety person, would have been laughed off as 'nonsense' and the person will be snubbed for thinking too wild. May be the risk level is very low, but not ZERO. As long as any opportunity is available to save the persons, the investment is worth as nobody can get back the life. The person's life may be valued at some amount and is compensated but he is more valuable to his family members than the compensation and this should be kept in mind. Else, surely there can be chaos and society has to bear it.
Feb 27, 2011
Feb 24, 2011
Hydrofluoric acid hazard potential
There is an article on HF hazard potential which I could not believe about its extent. What I know is that, if HF comes in contact with skin, it can cause burns, nasal rupture if inhaled, punctures and penetrates through the bone. But, the article mentions about its distance of impact of 2 miles from the source when travels as a cloud.
HF is used a catalyst in refineries to make high octane gasoline, as mentioned in the article. The IDLH is 30 ppm and it was found at 2 miles distance when 1000 gal was released from tanker containing 5000 gal at a pressure and temperature as used in refineries. The HF travelled as vapour and mist and needed 40 parts of water for every part of HF to dilute it, though the officials doing the experiment thought that it will remain as a liquid and can be contained. The article also mentioned about use of an additive to make HF less dangerous by way reducing its ability to form vapour cloud.
Few years ago, I read an article in the internet, in which a college girl died because of HF. When she was doing experiment, few HF drops splashed on her lab coat. She washed it with water for sometime and continued her lab work. She was found dead by her neighbours, the next day. The reason mentioned is that the vapour from lab coat was inhaled by the girl and this lead to oedema.
In a book on Bhopal accident, I read that few years before, in the same plant a similar death occurred from phosgene splash on the body. Here, the lesson is that we should not be complacent and assume that by washing for a minutes, the chemical can be cleaned. Once some chemical splashes, we should takeout the clothing. This should be followed with water wash.
Normally, as a safety precaution, one should wash for at least 15 minutes once any chemical splashes/falls on the body. Even then, studies show that only about 95% of the chemical on the skin can be washed off. During my safety lectures, I tell my audience that during the beginning of every shift, atleast once, they should check for availability of water in emergency shower/eye wash fountain and allow the water to run for few minutes so that any dirt/rust collected can run off. Else, the damage from this dirty water may be more than that from the chemical splash.
HF is used a catalyst in refineries to make high octane gasoline, as mentioned in the article. The IDLH is 30 ppm and it was found at 2 miles distance when 1000 gal was released from tanker containing 5000 gal at a pressure and temperature as used in refineries. The HF travelled as vapour and mist and needed 40 parts of water for every part of HF to dilute it, though the officials doing the experiment thought that it will remain as a liquid and can be contained. The article also mentioned about use of an additive to make HF less dangerous by way reducing its ability to form vapour cloud.
Few years ago, I read an article in the internet, in which a college girl died because of HF. When she was doing experiment, few HF drops splashed on her lab coat. She washed it with water for sometime and continued her lab work. She was found dead by her neighbours, the next day. The reason mentioned is that the vapour from lab coat was inhaled by the girl and this lead to oedema.
In a book on Bhopal accident, I read that few years before, in the same plant a similar death occurred from phosgene splash on the body. Here, the lesson is that we should not be complacent and assume that by washing for a minutes, the chemical can be cleaned. Once some chemical splashes, we should takeout the clothing. This should be followed with water wash.
Normally, as a safety precaution, one should wash for at least 15 minutes once any chemical splashes/falls on the body. Even then, studies show that only about 95% of the chemical on the skin can be washed off. During my safety lectures, I tell my audience that during the beginning of every shift, atleast once, they should check for availability of water in emergency shower/eye wash fountain and allow the water to run for few minutes so that any dirt/rust collected can run off. Else, the damage from this dirty water may be more than that from the chemical splash.
Feb 23, 2011
OSHA 40 Years Old and Aging Fast
The link below is about OSHA and the views of a safety professional about its efforts in the field of safety. It also describes, how OSHA is losing its influence due to various factors.
http://www.thesafetybloke.com/osha-40-years-old-and-aging-fast/
http://www.thesafetybloke.com/osha-40-years-old-and-aging-fast/
Feb 22, 2011
Side stand for two wheelers - their hazards
It is reported yesterday that a person fell from his two wheeler on the road divider and died on the way to hospital. The person fell because he parked his two wheeler on side stand and while taking the vehicle, he forgot to lift the side stand back to its position. When he was driving the vehicle, he drove over a speed breaker which hit the side stand that was in downward position and caused imbalance leading to fall of the driver. This side stand for two-wheelers appears to be very dangerous. On few occasions, I myself forgot to lift the stand and only when it hit something on the road, I realized my mistake and put it back to its rest position. And I watched many vehicle drivers, driving the two wheelers with side stand in downward position and passersby tried to point out the hazard to drivers.
Though parking a two wheeler on side stand is common, easy and may be a style statement, vehicle manufacturers should review this because of the danger it creates. At least some audio alarm should be provided when the side stand is in downward position when the ignition is switched ON. Best is to remove the side stand so that it will be safe and will not add to hazard potential of two wheeler driving.
Though parking a two wheeler on side stand is common, easy and may be a style statement, vehicle manufacturers should review this because of the danger it creates. At least some audio alarm should be provided when the side stand is in downward position when the ignition is switched ON. Best is to remove the side stand so that it will be safe and will not add to hazard potential of two wheeler driving.
Emergency escape routes - not available during emergency
Recently, a fire incident was reported in the basement of an office building in which three persons lost their lives. The reason for the death is not due to burns but because of asphyxiation. It is also reported that the fire fighters were unable to carryout rescue operations due to blocking of access and ventilation systems. About 10 years ago, a restaurant in Delhi airport also caught fire which started from the kitchen and people were unable to switchoff the exhaust (that spread the fire) as the switch was located at height and was not accessible.
Emergency accessories like manual call point, fire extinguishers, outward opening doors (emergency doors), stairs are those which we do not use day-to-day and it is seen in most of the establishments particularly in office buildings that these are blocked with junk items. The space under stairs is normally used as junkyard to keep mostly discarded chairs, tables, files, etc which are combustible. In basement areas, any fire involving these materials spreads fast due to natural draft and the same stairs which are required for fire fighting can't be used due to smoke coming up and due to poor visibility.
If fire fighters are equipped with fire resistant suits, self contained breathing apparatus and infra red cameras, only then they can approach the source to extinguish the fire. Else, they can become mute spectators. But, the building owners and others find it easy to blame the fire fighters for not doing anything, though the reason is because of greediness and shortsightedness of the building owners to ensure free access, maintain the areas free from combustibles and keeping constant vigil in these areas.
Some establishments provide fire extinguishers only to satisfy municipal authorities but they can be found behind some tables, or they are used to hold personal belongings like shirts, bags, etc and make them invisible. Sand buckets are generally used by employees as spittoons. If any construction or minor civil works are to be done, then these sand buckets are used for taking water, concrete, etc. The valve of the fire hydrant in the building (if provided) will be normally blocked with chairs. Or, the hydrant may not be in charged condition. Or, there is no water in the sump meant for this fire hydrant system.
In some buildings, the doors to emergency stairs are locked and this defeats the basic purpose of providing alternate stairs for use during emergency.
Many times the reason for fire is attributed to short circuit. A factory inspector in Tamilnadu based on his personal experience said that actually this is not at all the reason and if people can't find the reason, then they say short circuit as the reason. If short circuit is the reason, then all electrical wiring should be checked every year for their healthiness as we check earth pit resistance and electrical continuity between the switch and the earth pit. It should be made mandatory and checking should be done by only by approved third parties. Insurance companies should insist on these checks before providing the insurance cover. All basement areas and important rooms should be provided with CCTV cameras for surveillance. All corridors should have fluorescent (radiant) markings in the direction of nearest exit so that even in case of power failure one can see the glowing signs and escape. Emergency lights should be provided in the corridors and along the escape routes to provide minimum illumination. These lights should be capable of functioning atleast 30 minutes so that rescue operations also can be conducted. For high rise buildings, these lights should function for more duration as assessed by the fire services or similar agency.
Some pictures are shown below where fire fighting accessories are blocked/misused.Such conditions can be avoided and fire safety awareness can be increased among all employees including those in administration and similar services to ensure availability and misuse. These photos were collected from various online safety resources and their effort to create safety awareness and ensure safe workplace is acknowledged.
Emergency accessories like manual call point, fire extinguishers, outward opening doors (emergency doors), stairs are those which we do not use day-to-day and it is seen in most of the establishments particularly in office buildings that these are blocked with junk items. The space under stairs is normally used as junkyard to keep mostly discarded chairs, tables, files, etc which are combustible. In basement areas, any fire involving these materials spreads fast due to natural draft and the same stairs which are required for fire fighting can't be used due to smoke coming up and due to poor visibility.
If fire fighters are equipped with fire resistant suits, self contained breathing apparatus and infra red cameras, only then they can approach the source to extinguish the fire. Else, they can become mute spectators. But, the building owners and others find it easy to blame the fire fighters for not doing anything, though the reason is because of greediness and shortsightedness of the building owners to ensure free access, maintain the areas free from combustibles and keeping constant vigil in these areas.
Some establishments provide fire extinguishers only to satisfy municipal authorities but they can be found behind some tables, or they are used to hold personal belongings like shirts, bags, etc and make them invisible. Sand buckets are generally used by employees as spittoons. If any construction or minor civil works are to be done, then these sand buckets are used for taking water, concrete, etc. The valve of the fire hydrant in the building (if provided) will be normally blocked with chairs. Or, the hydrant may not be in charged condition. Or, there is no water in the sump meant for this fire hydrant system.
In some buildings, the doors to emergency stairs are locked and this defeats the basic purpose of providing alternate stairs for use during emergency.
Many times the reason for fire is attributed to short circuit. A factory inspector in Tamilnadu based on his personal experience said that actually this is not at all the reason and if people can't find the reason, then they say short circuit as the reason. If short circuit is the reason, then all electrical wiring should be checked every year for their healthiness as we check earth pit resistance and electrical continuity between the switch and the earth pit. It should be made mandatory and checking should be done by only by approved third parties. Insurance companies should insist on these checks before providing the insurance cover. All basement areas and important rooms should be provided with CCTV cameras for surveillance. All corridors should have fluorescent (radiant) markings in the direction of nearest exit so that even in case of power failure one can see the glowing signs and escape. Emergency lights should be provided in the corridors and along the escape routes to provide minimum illumination. These lights should be capable of functioning atleast 30 minutes so that rescue operations also can be conducted. For high rise buildings, these lights should function for more duration as assessed by the fire services or similar agency.
Some pictures are shown below where fire fighting accessories are blocked/misused.Such conditions can be avoided and fire safety awareness can be increased among all employees including those in administration and similar services to ensure availability and misuse. These photos were collected from various online safety resources and their effort to create safety awareness and ensure safe workplace is acknowledged.
 |
| Fire extinguishers as door stopper |
 |
| FE in safe custody? |
 |
| Unsafe storage of chemicals |
 |
| Bocked emegency door |
 |
| Emergency exit? |
Feb 18, 2011
Safety implementation - We are as good (and bad) as those in developed countries
I read a blog post today where it is mentioned that i) many managers consider safety implementation as a nuisance, reduces productivity ii) enforcement agencies are short of man power, iii) long battles in courts to penalize, iv) penalties are considered as added cost to the product rather than a warning for not following safety, and so on. The situation is not different here also.
Let it be any country, whatever be the rules and penalties or punishments are, it is the commitment of the management and its support that ensures safety at the workplace and this in the long run reduces the cost of production. Very few understand this as bypassing safety shows immediate increase in output, but in the long run leads to accidents as a result of fall in safety standards and reduces the productivity. One must remember that what we see today is the result of efforts (constructive or destructive) made in the past. One must not be elated and relax when going is smooth (safe) and should be on constant vigil and be committed to improve safety.
The blog post and comments under suggested that penalties should be on the persons rather than on the organization to warn the erring persons to implement safety. Though, we say occupier (the one who got ultimate control over the day-to-day affairs of the organization) is responsible, long delays in punishing the culprits are allowing them to run the organization as per their wishes. In this regard, the blog post suggested need for having industrial courts to handle such cases and give verdict quickly. Along with person based penalties, awarding of punishments also will act as a deterrent for the people to run organizations only for profit and drive them to implement good safety practices.
Let it be any country, whatever be the rules and penalties or punishments are, it is the commitment of the management and its support that ensures safety at the workplace and this in the long run reduces the cost of production. Very few understand this as bypassing safety shows immediate increase in output, but in the long run leads to accidents as a result of fall in safety standards and reduces the productivity. One must remember that what we see today is the result of efforts (constructive or destructive) made in the past. One must not be elated and relax when going is smooth (safe) and should be on constant vigil and be committed to improve safety.
The blog post and comments under suggested that penalties should be on the persons rather than on the organization to warn the erring persons to implement safety. Though, we say occupier (the one who got ultimate control over the day-to-day affairs of the organization) is responsible, long delays in punishing the culprits are allowing them to run the organization as per their wishes. In this regard, the blog post suggested need for having industrial courts to handle such cases and give verdict quickly. Along with person based penalties, awarding of punishments also will act as a deterrent for the people to run organizations only for profit and drive them to implement good safety practices.
Feb 17, 2011
NDTV Video of LPG Tanker explosion
There is a video of an LPG road tanker explosion occurred in Turkey. The video was captured in a cell phone camera. It shows the impact of pressure wave generated by the explosion in the form of fall of persons, light emitted during explosion, widespread damage to property and a crater in the road.
This reminds me of an incident where an LPG tanker toppled and fell on the road. Without understanding the hazard of explosion any time, passersby gathered around. Even the company officials took more than a day to put it on the road and tow away.
In another incident an ammonia tanker fell on the road. However, in this case, the road was blocked, the company officials promptly transferred the content to another vessel and cleared the area in a few hours.
Though everyone should be careful, it is the responsibility of the transporter and the manufacturer of the chemicals to ensure that transport containers are fit for road journey, the drivers know what to do in an emergency and are trained to handle the situation. Normally, the behavior of the public at large is to gather and watch. So, the driver of the vehicle, in an emergency, should caution and drive away the public to safe distance so that they are safe in case of any eventuality.
This reminds me of an incident where an LPG tanker toppled and fell on the road. Without understanding the hazard of explosion any time, passersby gathered around. Even the company officials took more than a day to put it on the road and tow away.
In another incident an ammonia tanker fell on the road. However, in this case, the road was blocked, the company officials promptly transferred the content to another vessel and cleared the area in a few hours.
Though everyone should be careful, it is the responsibility of the transporter and the manufacturer of the chemicals to ensure that transport containers are fit for road journey, the drivers know what to do in an emergency and are trained to handle the situation. Normally, the behavior of the public at large is to gather and watch. So, the driver of the vehicle, in an emergency, should caution and drive away the public to safe distance so that they are safe in case of any eventuality.
Feb 16, 2011
Cell tower radiation and its impact on health
There is an article in Times of India in which it is stated that apart from the heat generated during the use of mobile causing ill health, the electro magnetic effect on the body cells is more harmful. The symptoms of cell radiation is in the form of burning and tingling sensation in the skin of the head, fatigue, sleep disturbances, dizziness, lack of concentration, ringing in the ears, reaction time, loss of memory, headache, disturbances in digestive system and heart palpitation, etc.The recommended SAR of 1.6 watt/kg will help in reducing these effects, the report says.
Though many these symptoms are known to appear even because of pollution, lack of good diet, workload at office, stress due to boss/peers, etc, the disappearing of doves and even pigeons, as reported in a news paper recently, adds strength to these findings. But, the above report is based on one professor's research report. The report also says to use speakers, restrict cell phone use to 6 min/day. I am not sure whether the study includes observations and measurements are result of studies conducted in less polluted areas like villages where though roads and transport is not available but cell towers and use of mobiles exists. As I said above, due to overlapping nature of symptoms from different sources (pollution, stress, etc), to understand the real reason i.e impact of cell towers and mobile use, the study should be conducted in an environment where pollution, work stress, etc are not present.
The first news paper article states that Indian cell phone users are more at risk for adverse affect of radiation due to hot tropical climate, low BMI and low fat content. On lighter side, we may conclude that, obese people are less prone to cellphone radiation effects. So, if you can't avoid cell phone use, increase your BMI, but face all problems due to high BMI.
Another report says Wi-Fi radiation is killing trees based on a study by exposing the trees to this radiation.
One thought that is in my mind for last few years is, though we say EMF due to cell towers poses health hazards to persons in the vicinity, we are not bothered about the radio waves that our body is constantly exposed whether we use cell phone or not. I feel that like cosmic radiation, the waves in the air also pose health hazards to entire humankind. When someone makes a call from his phone, as I understand, the signal from the cell tower hunts the destination mobile number and in the process like sun light falling on every person on the earth, in a similar fashion, all of us are exposed to these signals (or waves?).
Though many these symptoms are known to appear even because of pollution, lack of good diet, workload at office, stress due to boss/peers, etc, the disappearing of doves and even pigeons, as reported in a news paper recently, adds strength to these findings. But, the above report is based on one professor's research report. The report also says to use speakers, restrict cell phone use to 6 min/day. I am not sure whether the study includes observations and measurements are result of studies conducted in less polluted areas like villages where though roads and transport is not available but cell towers and use of mobiles exists. As I said above, due to overlapping nature of symptoms from different sources (pollution, stress, etc), to understand the real reason i.e impact of cell towers and mobile use, the study should be conducted in an environment where pollution, work stress, etc are not present.
The first news paper article states that Indian cell phone users are more at risk for adverse affect of radiation due to hot tropical climate, low BMI and low fat content. On lighter side, we may conclude that, obese people are less prone to cellphone radiation effects. So, if you can't avoid cell phone use, increase your BMI, but face all problems due to high BMI.
Another report says Wi-Fi radiation is killing trees based on a study by exposing the trees to this radiation.
One thought that is in my mind for last few years is, though we say EMF due to cell towers poses health hazards to persons in the vicinity, we are not bothered about the radio waves that our body is constantly exposed whether we use cell phone or not. I feel that like cosmic radiation, the waves in the air also pose health hazards to entire humankind. When someone makes a call from his phone, as I understand, the signal from the cell tower hunts the destination mobile number and in the process like sun light falling on every person on the earth, in a similar fashion, all of us are exposed to these signals (or waves?).
Feb 14, 2011
Gas leaks, crude method of testing, gas poisoning/fire
There is a news item which mentions about the death of 2 persons and hospitalization of 2 more due to inhalation of poisonous gas from a manhole. One of the deceased went inside the manhole to check gas leak. As it appears, no PPE was used by the victims. Few years back, I read a similar incident wherein one auto driver opened the petrol tank lid and tried to check the petrol with the help of a lit match stick which resulted in burn injuries on the face. Similarly in another incident, a person died when he tried to see the water level in an underground water reservoir. The person died though he was sitting on the top of the tank and lowered his head without actually entering into it.
The safe practice is to lower the gas monitoring instrument / gas drawing tube to the place of work and check for levels rather than allowing the person to enter in to it. If it is not possible for any measurement due to complexity of the approach for the instrument, then a person should enter only after wearing self contained breathing apparatus and safety belt and communication system under the watchful eye of another person at the entrance of the opening.
Few years back, I saw in NGC in a "Seconds from Disaster" episode, where flammable gas leaked from the line (which was deep inside a river), diffused into a weak sewage water line adjacent to it, passed through sewage line network, leaked outside through open manholes of the city and caused widespread explosions after it found an ignition source in the form of a spark generated by lifting and dropping of manhole by one of the municipal employee. This type of fire and explosion is beyond imagination of persons. But, there was an accident reported where sparks from gas cutting work ignited a gas leak. Rules insist upon maintaining minimum 15 m radial distance around hot works, to be free from any flammable materials/storages. There is nothing wrong in covering flammable material containers with asbestos cloth / wet cloth to prevent spraks falling on them and there is no need to feel shy of being extra cautious about safety.
Though, people doing/permitting such hot works without safety precautions question about the wisdom of maintaining safe distances, occurrences of fire incidents remind us to be extra cautious and to know that "Rules are for all to implement" and only fools (though they claim that they are knowledgeable and are in good management position because of their so called hard work) violate the rules.
The safe practice is to lower the gas monitoring instrument / gas drawing tube to the place of work and check for levels rather than allowing the person to enter in to it. If it is not possible for any measurement due to complexity of the approach for the instrument, then a person should enter only after wearing self contained breathing apparatus and safety belt and communication system under the watchful eye of another person at the entrance of the opening.
Few years back, I saw in NGC in a "Seconds from Disaster" episode, where flammable gas leaked from the line (which was deep inside a river), diffused into a weak sewage water line adjacent to it, passed through sewage line network, leaked outside through open manholes of the city and caused widespread explosions after it found an ignition source in the form of a spark generated by lifting and dropping of manhole by one of the municipal employee. This type of fire and explosion is beyond imagination of persons. But, there was an accident reported where sparks from gas cutting work ignited a gas leak. Rules insist upon maintaining minimum 15 m radial distance around hot works, to be free from any flammable materials/storages. There is nothing wrong in covering flammable material containers with asbestos cloth / wet cloth to prevent spraks falling on them and there is no need to feel shy of being extra cautious about safety.
Though, people doing/permitting such hot works without safety precautions question about the wisdom of maintaining safe distances, occurrences of fire incidents remind us to be extra cautious and to know that "Rules are for all to implement" and only fools (though they claim that they are knowledgeable and are in good management position because of their so called hard work) violate the rules.
Feb 5, 2011
Fire during solvent transfer in buckets from drums
2-3 days back, I read a news item in a regional news paper that there was fire while transferring a solvent with a plastic bucket from drums. There were sparks followed by big fire.
It is clearly due to static charge builtup during dipping of plastic bucket in drums containing solvent. Static charge is generated due to friction between conducting (metal drum) and non-conducting (solvent, bucket) media. For solvent transfer, one should provide proper piping arrangement with earthing and bonding to dissipate the charge accumulated.
Few years back, I read a case study in which a fire occurred while transferring the solvent through braided plastic hose. Investigation revealed that the electrical continuiity was broken as there was no contact between the nozzle and the metal braid reinforcement to the hose. During transfer for extended time, the accumulated charge on the hose discharged as spark causing fire.
Hence, earthing and bonding are important aspects and one should avoid short term measures like bucket transfer to avoid recurrence of such fire incidents. Further, the operators should not wear synthetic dress (wear only cotton dress), wear antistatic foot wear, ensure turbulence, nozzle spray, etc to avoid static charge generation/accumulation.
It is clearly due to static charge builtup during dipping of plastic bucket in drums containing solvent. Static charge is generated due to friction between conducting (metal drum) and non-conducting (solvent, bucket) media. For solvent transfer, one should provide proper piping arrangement with earthing and bonding to dissipate the charge accumulated.
Few years back, I read a case study in which a fire occurred while transferring the solvent through braided plastic hose. Investigation revealed that the electrical continuiity was broken as there was no contact between the nozzle and the metal braid reinforcement to the hose. During transfer for extended time, the accumulated charge on the hose discharged as spark causing fire.
Hence, earthing and bonding are important aspects and one should avoid short term measures like bucket transfer to avoid recurrence of such fire incidents. Further, the operators should not wear synthetic dress (wear only cotton dress), wear antistatic foot wear, ensure turbulence, nozzle spray, etc to avoid static charge generation/accumulation.
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