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Speaking of Precision

Speaking of Precision is a knowledge preservation and thought leadership blog covering the precision machining industry, its materials and services. With over 36 years of hands on experience in steelmaking, manufacturing, quality, and management, Miles Free (Milo) Director of Industry Research and Technology at PMPA helps answer "How?" "With what?" and occasionally "Really?"

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How to Clean Up Mercury Spill From Fluorescent Light-OSHA

Posted September 18, 2012 12:00 AM by Milo

A new OSHA Quick Card provides guidance to minimize employee exposure to mercury when cleaning up a broken fluoresecent light.

I think we have all heard the urban legends about broken mercury thermometers being cause of school evacuations that turn out to be true stories of overreaction.

And that the EPA 's draconian procedures require hazmat suits (Not true- at least the part about needing a Hazmat suit). There is nothing about Hazmat suits in their EPA CLEAN UP BROKEN CFL INSTRUCTION (Although one Maine couple got some bad advice that cost them over $2000 for the cleanup of a single broken CFL bulb.)

And the MSDS sheet sure can put the fear into you if you don't understand dosing quantities, air volumes and circulation, and exposure.

So we were pleased to find that OSHA has actually published a quick card to protect workers and companies from bad advice and give authoritative guidance on reducing the risks from broken mercury containing fluorescent bulbs and tubes.

(Official common-sense, non-hysterical guidance for cleaning up a broken fluorescent bulb. Whew!)

Safe Cleanup of Broken Fluorescent Bulbs

  • Notify workers and tell them to stay away from the area.
  • Open any windows and doors to air out the room.
  • Do not use a broom or vacuum cleaner unless the vacuum cleaner is specifically designed to collect mercury.
  • Wear appropriate disposable chemical-resistant gloves.
  • Use a commercial mercury spill kit if available, or scoop up pieces of glass and powder with stiff paper or cardboard to avoid contact with the broken glass.
  • Use sticky tape to pick up any remaining pieces of glass.
  • Wipe down hard floors with a damp paper towel.
  • Place all pieces of glass and cleanup materials in a sealable plastic bag or a glass jar with a lid.
  • Wash your hands thoroughly after cleanup.

(Grainger sells mercury spill kits that look like they contain most of what OSHA"s guidance says you need.)

Myself, I'd put the debris collected in a metal paint can type of container. Why put the hazardous debris in a plastic bag which will not contain the mercury vapors? Why put it in another easily breakable glass jar? Metal can is safer.

Maybe it has something to do with recycling?

(This won't break if it's dropped. Hmmm?)

Disambiguation Alert: Don't confuse this quick card with the fact sheet which is specifically for people working in the fluorescent disposal industry.

(No special precautions needed if you encounter one of these.)

Paint can photo

Mercury Record

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#1

Re: How to Clean Up Mercury Spill From Fluorescent Light-OSHA

09/18/2012 1:09 PM

What the EPA does not tell you is that 40% of the mercury vapor in the air comes from volcanoes. Another 40% comes from burning fossil fuels. And nobody wants to upset the oil producers because it hurts us in the wallet.

The evaporation rate of liquid mercury is on the order of 56 µg/litre at 25 °C and actually that is subject to surface area, heat transfer, and atmospheric pressure. Not to mention that the density will cause it to hang around on the floor which means you probably won't be breathing it unless you passed out from the panic you experienced when you broke the bulb. Really your biggest concern at this point would be from blood loss due to landing on top of the broken glass.

Mercury bonds quickly with other metals. If you can even find it, let it bond with a copper penny and you will have it fairly well contained at a fraction of the cost of some of the other junk for sale.

Mercury occurs naturally in the air and water. Gold prospectors still use it to gather up small particals of gold. Then they burn it off with a torch, but their daily exposure is much higher than you would get from crushing fluorescent lamps all day long for a year. The hat makers of a hundred years ago, known as "Mad Hatters" were exposed to heated mercury in a large vat. It took time and repeated exposure to have this effect so a single fluorescent lamp is nowhere near that level of threat. People who worked in sloppy lamp factories could be exposed to levels above OSHA recommendations. No lamp manufacturer has ever had "Mad Hatters" despite their sloppy handling practices. Plenty of employees have had their minimum exposure levels exceed the OSHA recomendations without any known long term consequences.

Lastly, this whole fear over mercury exposure was used as a marketing strategy recently in the USA and all the US manufacturers invested millions of dollars to reduce the actual mercury used to something you would be hard pressed to find with a magnifying glass. In fact, the leading advocate of reduced mercury had such poor control that a high percentage of their products suffered from mercury starvation. Mercury starvation in a fluorescent lamp causes the light output to be reduced to an argon glow (a red/purple glow) at about 5% of the normal light level. Manufacturers of lamps in some other countries, however, present a higher risk level.

Probably the highest chance of unintended exposure is to be downwind of a waste processor that incenerates their trash. Broken lamps mixed in with trash can be burned releasing all of the liquid mercury in the form of vapor. And no trash processor is going to be effective at eliminating all of the toxic materials released. Because of this, many cities have instituted separate collection points for lamp disposal. The concept of a lamp recycler is a hoax. Separation of components is very inefficient and the major byproduct is landfill.

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#2

Re: How to Clean Up Mercury Spill From Fluorescent Light-OSHA

01/07/2014 10:45 AM

Milu-

Your comments concerning the mercury contained within fluorescent lamps are mostly incorrect, unproven, misleading and outright dangerous. When the correct procedures for handling Mercury are compared to what it stated it becomes apparent that the posting is not based on knowledge of handling Mercury.

Mercury vapors are clearly the most dangerous form of this element. These are emitted from both the metallic liquid form and the gaseous emissions from heated and vaporized Mercury. One breakage of a mercury thermometer under the wrong conditions could lead to eventual death from the vapors. Likewise the mercury within a fluorescent bulb can be very detrimental to the health of an individual if retained in some of the worst locations for it. Some school evacuations are warranted depending upon the conditions of the spill. The degree of effect on humans is related to their sensitivity, long term exposure, temperature, quantity, point of contact. Some of the compounds that are manufactured with mercury and used to be used in such common places as consumers wall paint are eventually deadly from long-term exposure.

Depending upon the conditions stated above hazmat suits, usually level C with a mercury cartridge respirator, and are warranted. For high levels of potential exposure to mercury or some of its derivative compounds a level "B" suit is required. The mercury cartridge respirators mentioned are a special type used only for mercury and with available usage indicators on them

If someone referring to a MSDS doesn't understand the information given by it concerning the hazards of mercury such as dosing, quantities, air volumes and circulation, and exposure they should be consulting with someone who does. That person should discuss it with them to the point that they understand all the hazards, how to avoid them and what to do if exposed.

The materials used in the spill cleanup kits that does the actual leaning up is powered zinc metal. When placed with the mercury it readily mixes with it and forms an amalgam identical to those used in filling teeth (with a slight variation in composition for the teeth).

The debris must be put in a plastic bag to enclose the vapors within the package that will be processed. In fact it should be double or triple bagged as is necessary for most hazardous waste. Placing it directly in a metal can expose the people who will be later reprocessing/reclaiming/disposing the materials to unnecessary vapors. The glass jar is constructed very strong and permits the sample to be examined without opening the vapor proof glass container. For shipments, this container should be packed within vermiculite or other suitable shock absorbent packaging material.

There is much more information concerning mercury than is mentioned in this posting. Knowledge of this will reduce the exposure to mercury and likewise the detrimental effects on personnel. Mercury poisoning is a very horrible thing to experience you, a relative, a friend or even anyone else. It is an accumulative poisoning. Metallic mercury vapors first affects the memory, next the attention span, the muscles, the joints, the function of the internal organs, the complete functioning of the body and next, if you are lucky, you will succumb to it and be out of your misery.

I am extremely familiar with the processing of metallic mercury and compounds derived from it. Are you aware that many biocides were mercury based? One of the most common uses of mercury compounds was a content of latex paints to remove the formation of bacteria and fungus from the paint. If not preserved these paints would grow fungus very soon after application. If the people making this material got it on their skin and didn't wash it off with the correct soap within a few minutes it would burn them. Anywhere from 4 to 24 hours later extremely painful blisters would form on the person's skin. These are about the most painful blisters you can have. The blisters must be "debrided" to remove the mercury drainage contained within them. Debriding is cutting the skin off the blisters so that only the skin below is left. Depending upon where the burn is and how bad it is can disable a person for a month or more. In addition and even sometimes more important is where on the body the burns are. If someone gets it on their feet from soaking through the shoe walking is very difficult. There oared other areas that can very painful and embarrassing. All People have been taught to wash their hands before eating, in this environment it is equally, if not more, important to wash your hands prior to going to the bathroom for fear of contamination. Take the pain from the burn, add the pain from the deriding, include the accusations of immoral conduct because of the location of the burns and they have a very severe, painful burn with a lot of explaining to do.

Mercury poisoning is a very serious matter and must be prevented. There are many other facts about mercury that are applicable but time and space are not available.

Good Luck, Old Salt

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#3
In reply to #2

Re: How to Clean Up Mercury Spill From Fluorescent Light-OSHA

01/07/2014 11:34 AM

I stand behind my post and the information shared from EPA and OSHA.

Milo

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#4
In reply to #3

Re: How to Clean Up Mercury Spill From Fluorescent Light-OSHA

01/07/2014 2:44 PM

Milo-

Likewise I stand behind my post based on 10 years of engineering, safety and environmental experience in a manufacturing site that processed 5 metric tons of mercury per week into numerous products. This includes the product mentioned which was voluntarily withdrawn, and no suitable substitute developed to replace it, in accordance with an EPA mandate. The information "shared from the EPA and OSHA" is only minimal and most possibly outdate. They do not publish complete and specific information for fear of starting hysteria amongst people who are not familiar with the element and its compounds. This is a common tactic of both the EPA and OSHA until more information is obtained.

My dealings with regulatory agencies concerning this element and its compounds included direct interaction with the EPA, OSHA, NIOSH, State DEP, and Local Health Dept., several research laboratories at universities, the American Chemical Council, SOCMA, and several others. This was not casual interactions but extensive and in-depth. One of the previous OSHA publications on mercury was based on information which we provided them.

My comments are based on facts, experience, some research and development and reading numerous publications and discussions with their authors. I spent ten years doing this, a lot more than reading two general publications.

Are you aware that the "Mysterious Potion Powder" is Zinc Powder, the same that I mentioned, included is that 3 gallon spill kit is the same as we used to remove mercury out of 10,000 gal/day of processing waste water?

Are you aware that a "Mercury Trap" for removing mercury from insoluble liquid compounds such as water. A mercury trap is similar to a sink trap, filled with water, and made of glass to observe the level of Hg in it.

Are you aware of the amalgam powders that are used by a dentist are? They are Silver, Copper, Tin and sometimes zinc and some others at very low concentrations. Are you aware that the recommended mix is 1:1 with mercury by weight?

Are you aware that the most frequent exposure to mercury used to be dental technicians whose supply/mix rooms were carpeted? The Hg would get spilled and bury itself in the rug. That is a very difficult place to remove it from.

Are you aware that the most frequently used method of suppressing Hg vapors is to put some water over it?

Are you aware that the procedure for removing mercury from a laboratory sink trap is to put Zinc powder in the drain, let it sit overnight and removing the trap the next day. The mercury that was there is now a solid amalgam which is easily and harmlessly removed?

Instead of reading minimal information intended as casual information for the general public such as:

https://www.osha.gov/pls/publications/publication.athruz?pType=Industry&pID=137 from OSHA and from the EPA: http://www.epa.gov/mercury/

It would be prudent to investigate the more scientific publications, consult with reputable information such as can be obtained with various Google searches and find out the bigger picture before possibly making sarcastic, illogical untrue statements about a subject. This subject requires much more than what appears to apparently used.

I certainly don't want to get into a pi_ _ ing contest over this matter. I am trying to point out that for CR4 to be intelligent and productive blog proper information and knowledge must be obtained. No doubt there are probably several members that could run rings around me about mercury and I respect them for it. There are many members who are experts in their fields out there who can obtain an excellent answer if they have the unique knowledge or know where to research the subject. If they don't know where to research it they will find out.

Again I have no intent on making this a combative exchange of wasteful and sarcastic postings. What I am attempting to do is the same as that of the majority of posters want, to make CR4 a better blog where information is exchanged by intelligent and respectful give the best answers possible. Most members want to help each other. That's what makes this a good blog and what will make it even better in the future.

My apologies to others for taking up so much time and space on this. I can assure you that there was no attempt to "beat my drum" about my knowledge of Mercury. As most of you know, if you are being paid to know and exercise information you've got to get it.

Good Luck. Old Salt

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