What are the dangers of asbestos removal?
The danger of asbestos is that the fibers of certain forms of the mineral can, if inhaled cause a type of lung cancer called mesothelioma, which is almost always fatal. Typically this cancer only occurred after years of long term chronic exposure, such as in miners or shipyard workers who worked with asbestos daily. Once the connection between lung cancer and asbestos was established rules were created to phase out its use and to deal with the asbestos that was already in place in homes and factories. The current legal exposure limits for airborne asbestos is set very low.The danger with removing asbestos is that the removal work can make the fibers airborne and expose the removal workers and public to exposure both during the work and afterward if fibers are allowed to drift around and beyond the work site. The removed asbestos also has to be handled carefully so that it doesn’t get mishandled before it is typically buried in a landfill. There are both federal and state laws concerning all aspects of asbestos identification and removal, failure to follow the laws can lead to legal liabilities and fines. In most jurisdictions only trained and licensed contractors are allowed to handle asbestos.
I visited an abandoned building that may contain asbestos. I was in for 30 minutes in heavy wind and it was raining. Should I worry?
Anything is possible. The firefighters and police at 911 looking for survivors of twin towers were exposed for relatively short periods and many came down with Mesothelioma and asbestosis. That's why there is so many lawyer commercials on TV. A 15 minute exposure is not enough to do much though. Heres your important factors to gauge your risk factor. A. Do you smoke? smoking while in the asbestos field makes it 100 times more dangerous. B. What kind of asbestos was it? Some types of asbestos are much more dangerous than others. C. Do you know for sure that asbestos was even in the air? It may have been settled already. The only to know would be to do an air sample and see what kind of exposure you had. Truth is, asbestos is very common. You may have been exposed many more times and didn't give it much thought. School, Colleges, Ships, Military, Construction. ETC.
Do HEPA air filters remove asbestos from the air?
Thomas here, the nerd behind Smart Air. I’m not an expert in air purifiers, just a nerd who DIYs purifiers in order to breathe clean air in Beijing.Do HEPA filters capture asbestos?HEPA purifiers capture particles (not gases), and asbestos is solid, so we’re off to a good start.But how big are those particles? This engineering website says asbestos particles range from 0.7 to 90 microns. HEPA filters capture over 99% of particles above (and below) 0.3 microns, so they should capture plenty of asbestos.The hardest size of particle for HEPA filters to capture is right around 0.3 microns. Above and below that, it’s actually easier to capture particles.Bottom line: If asbestos particles are around 0.7 microns, a HEPA filter should be capturing well over 90%.Do masks capture asbestos fibers?Asbestos causes cancer, so I wouldn’t rely on just a purifier while in the room. I’d want to wear a mask. But do masks actually capture particles that small?This study from the University of Massachusetts tested what percentage of particles of different sizes masks can capture. Here’s what they found:The closest size to 0.7 microns here is 500 nm and 1 um. (More mask test data down to .007 microns here.) The standard N95 mask on the left was capturing over 90% over both of these particle sizes. Thus, a good mask should protect you from a high percentage of asbestos particles (although I’d use an N99, which captures a higher percentage of particles).But above all, be safe!P.S. I cover more on whether pollution masks actually work, including my own fit tests here:Are there any anti-pollution masks that work?Is Asbestos a Problem in India?Is Asbestos a Problem in China?
What is asbestos?
Asbestos is a naturally occuring mineral silicate. It is found in 80% of the Earths Crust. There is 2 major families of regulated asbestos fibers. The most regulated is crysotile and amosite. Others include Tremolite (used in cement pipes) actinolite and crocidolite. The last 3 are rare. Amosite was heavily mined in Africa and gained the nickname African Death. But Crysotile is also dangerous (contrary to one of the posts I read above) and it can cause asbestos related disease. Chrysotile is the most used in the USA, Many old mines still exist in california and many are now dumps for the hazards asbestos waste. Both have bans on their usage. in 1973 The US government Baned asbestos use in drywall mud/joint compound and in pipe insulation. in 1978 it was banned in acoustic ceilings. Many more materials that were once manufactured with asbestos have also been banned and are regulated. These materials include Floor tile, ceiling tiles, decortive exterior coatings, air duct insulation, blow-in attic insulation, heat shield, drywall, roof felt, and about a 1,000 other materials. Asbestos can cause various diseases including mesotheliomia, lung cancer, plural plaques, bone caner, emphazema, and more. As besto sis still used in limited application / materials. Most Break pads and clutches still includes a percentage of asbestos. Also it is still used in laboratory filters, electrical generators, roof mastic, and other non-friable (materials that dont release fibers easily). Asbestos is also used in the O rings on the boster rockets of the US space shuttle. Some idiot had the bright idea to use something different than asbestos one time on the O rings. That was when the shuttle blew up on take off when the O ring failed. Almost All people have breathed some asbestos in their lifetime. If you sit at a bus stop or stop and go traffic you have breathed asbestos. But like cigerattes it is dose related. therefore the more ingested the greater the risk for disease.
What happens when water goes "down the wrong pipe"?
In a mild case, you’d start coughing which is the most effective way of getting the water out of the esophogus (the wrong pipe). In more severe cases, water gets stuck where it won’t seem to get out. You can’t even get a deep enough breath to cough.I’ve had clients who’ve gotten to this point. Trying to initiate coughing is essential. Raising the hands above the head helps. The heimlich may help.It happened to me once while driving. My passenger was terrified. As I’ve had training, I simply pulled the car over, forced myself to take a deep breath, managed to get air in the lungs and was able to cough it up. Taking the breath in is very hard to do. I assume that many people wouldn’t be able to do it.
How are large buildings containing asbestos demolished?
By and large, the asbestos is removed first and then the building is demolished.The determining factor is the type of products, within the building, that contain the asbestos.In the UK there are two classes of asbestos containing products (ACMs):licensable, andnon-licensable.Both should be removed, as much as possible, from the building prior to demolition.Only companies holding an asbestos removal license can remove any licensable ACMs. These are the most dangerous types of ACMs; the ones most likely to release fibres into the air. These ACMs include:Loose insulationSprayed coatingsPipe laggingAsbestos Insulating BoardAll of these materials will be removed under fully controlled conditions by properly trained personnel.The non-licensable ACMs, though, can be removed by anyone who has received the appropriate training and has the right equipment. The types of ACMs here are things like:Asbestos cementsVinyl flooringBitumen productsResins and slatesAfter removal, there is an allowance for small amounts of low risk materials to stay in place during the demolition. Some materials are simply not cost effective to remove for the risk they pose. Asbestos cement shuttering between two beds of concrete is a classic example.These amounts, however are very low. The cost of having a licensed contractor picking through a demolished building, by hand, looking for debris, on the other hand, is very high.I’ve seen it happen!The costs of these asbestos removals can be very high. This can be extremely frustrating, in both time and cost, if the asbestos removal isn’t planned into the demolition process.I’ve seen that happen more times than I can count.Once the asbestos is safely removed from site, the building is demolished as normal.I hope this is helpful.
What are the most dangerous jobs in the world?
Alaskan crab fishing is considered the world's most dangerous job with a fatality rate 80 times that of the average worker. The job involves venturing out into the hostile Bering sea and casting out large baited pots down to the seafloor to catch the crabs. The dangers include falling overboard, bad weather being dragged into the water by the ropes, extreme exhaustion caused by the long working hours and crippling injuries caused by working with heavy machinery. You can make a small fortune doing this job but there's also a high chance that you won't get home to spend any of it.Lumberjacks are people with the job of cutting down trees and 91 deaths for every 10000 workers nearly 30 times greater than the average job this is dangerous work. Lumberjacks must be very careful not to get a huge falling tree and injuries from the heavy machinery are common. transporting these trees could be even more hazardous as it was usually done by sending them down river to the saw mills and when a log became jammed someone would have to run across the logs and free the log using a big stick. The logs were very slippery, constantly moving and if you fell into the water then drowning was almost guaranteed.Firefighters are people trained to extinguish hazardous fires that threaten life, property and the environment. Dangers include being burned, carbon dioxide poisoning, developing cancer due to exposure to toxic chemicals and getting trapped in a burning building. This is a dangerous job and the fatality rate is actually increasing every year unlike most other jobs where the fatality rate is decreasing.Astronaut is one the most difficult, exciting and dangerous jobs in the world to have. The requirements are really difficult to meet and only 536 astronauts have flown in space. Dangers include the rocket exploding during launch, failure of the space suit during a spacewalk exposing you to the vacuum of space, muscle and bone lose caused by the micro gravity, micro meteorites damaging the space station and burning up during re-entry to the Earth's atmosphere. miraculosly however only 18 astronauts have died on the job and it remains a dream job that many kids aspire to have.
What are the hazards of installing a mobile tower on the roof of my building?
This is one question I have been waiting to answer since I joined Quora.I won't deny that that it will have absolutely no effect on your or your neighbors health. However, the following points may help:1. All the cellular towers should have a radiation power within the specified limits by Indian and International organizations. The effects, if any, are very small, and very much ignorable. 2. A tower usually has an ideal place where the company cna get best coverage with minimum radiation.3. Communication with towers doesn't need line of sight. The bounced off signals are just as good if they bounce of appropriate surfaces(buildings vs. hills). So, the radiation of a tower is usually very low right below, or for the whole building right below the tower. For more on radiatoin patterns and why closest to tower doesn't mean dangerous, refer to Dinesh Yalavarthy's answer to Cancer: Mobile towers are usually installed on the terrace of the building near the water tank. Does it make water radioactive and later consuming that water leads to cancer?What from all this?The companies usually like to install the tower at the highest place closest to their ideal location (derived from their calculations) So, if the first best suited position rejects, they go to the next best building, which could be at a lower height, and/or will require higher radiation, and thus may actually start becoming dangerous.So, if someone asks for a tower on your building, please accept immediately. It's good for all.