Vuvuzela

Okay, so I've been procrastinating about writing due to the World Cup. I feel positively European, since I can tell you which 8 games went on this week and who's advancing and when the next games are. One of the big to-dos about the games in South Africa is the use of the Vuvuzela, a traditional horn used there for soccer games.

At one of the U.S. games (I think it was England, if not it was Algeria), I saw two men in the American fan section wearing ear plugs. I was so amused (pleasantly). You could see the little yellow ear plugs, which means they probably weren't inserted exactly the right way. But, given the fact that these traditional horns can produce up to 120 dB(A) at 1 meter @ 1 kHz, I finally agree that any amount of noise reduction is a good thing. What I really want to know is who these two fellows are and why they thought that was a good idea. Do they already have occupational exposure to noise? Are they industrial hygienists or safety professionals or occupational medicine nurses/doctors? Or did they just decide 'hey, this is going to be really really loud, let's bring ear plugs!"

There are countless studies published on noise induced hearing loss (NIHL) and many involving sports-related exposure. Two months ago, immediately prior to the World Cup in South Africa, several articles have been published about the vuvuzula in particular, as well as - of course! - a Wikipedia page on health effects.

So, in summary, they're really really really loud.

original cited research (if the article is on-line, I included a link):

Swanepoel D, Hall JW III, Koekemoer D. Vuvuzela – good for your team, bad for your ears.
S Afr Med J (2010) 100, 4, 99-100.
with a follow up report from the authors explaining their noise measurement method & providing a table of results:  122 dB(A) at 1000 Hz and 2000 Hz at the bell opening.

Swanepoel D, Hall JW III. Football match spectator sound exposure and effect on hearing: A pretest-post-test study.
S Afr Med J (2010) 100, 4, 239-242

Berglund B, Lindvall T, Schwela DH, Goh KT, eds. Guidelines for Community Noise. Technical Report. Geneva: World Health Organization, 1999.

According to South African media Sports24, 1.5 million of these things have been sold in Europe since October.  If they were all being manufactured in South Africa, I would be more likely to believe the ever-present claims of sports proponents about how wonderful things like this are for the local economy.

One manufacturer has designed a vuvuzula which reportedly produces 20 fewer decibels.  While 100 dB dropped down to 80 dB will get you by in the workplace, it still ignores the fact that Soccer City in Johannesburg will hold up to 84,490 people for the World Cup this year.  Noise exposure is additive.  The end result of 20,000 (or more) people blowing is going to be far above 80 dB even with the new gadgets.

Picture of warning symbol on vuvuzula

One of these things turned up at the Riverview last week during the US : Slovenia game.  With the theater at almost capacity (I'd guess 90% of 700 person capacity), the vuvuzula was surprisingly loud.  Everyone turned around at the first blast and immediately knew what it was without seeing it.  One of them was a nice, if loud, addition to the game since it was only blown about a dozen times in short blasts.  In a really large movie theater, one was enough for me sitting at least 20 yards away.  I think it was at the back of the theater and I was sitting almost down front.

Last Sunday at the Germany : England game, someone brought a small (18") version to a restaurant.  It was an unholy racket.  Luckily he only blew it about 3-4 times before the game started.  The restaurant, needless to say, was much smaller than a movie theater.
.

Sports and Risk Perception

This is an astonishing example of public risk perception.  The public health advice is also shocking.

Soer, who was present when the study was done and is knowledgeable of the findings, gave some simple advice on how to avoid any danger.

"Wear earplugs to the games," she said. "Either buy them at a pharmacy or make them yourselves and take it with you to the soccer games.

make them yourself... ? And this comes from a medical doctor?
I don't know what Communication Pathology is.  I infer from their limited website it is infectious diseases.  One of study foci was transmission of disease by sharing horns, so I understand a pathologist being involved.  But she obviously isn't familiar with how ear plugs work.  Does she think a wad of cotton is going to help?  Or is there some common item South Africans use for this purpose?

With poor risk communication from professionals, it is unsurprising that individuals are not making optimum choices.

"I am not worried," said Matthew M'Crystal, a 24-year-old law student. "Anyway, it won't kill us."

The chronic excuse:  'it won't kill me'.  Well, one of these days, being a lawyer, he's going to decide to sue someone over his noise-induced hearing loss by claiming "But I didn't know it was bad for me!"


"I could have died in Mexico," said Ricardo Avila, a 56-year-old soccer fan visiting South Africa for the tournament. "So no, it does not bother me."

Here is a different problem with individual risk perception.  Even when you give a perfectly clear explanation of the risks of exposure, and the employee really does understand it ... her risk comparison may be standardized against something other than yours.

"You have a 1:100 probability of losing your hearing"
"Yes, but I live in the area of town with the highest crime rate, gang activity and there was a drive-by shooting on my block last night.  Losing my hearing isn't so bad."

There will be a few more posts about noise and the World Cup.

I think I might borrow a noise meter from the U's IH lab to see how loud it gets on Saturday during the Germany-Argentina game over at the Glockenspiel in StPl.  I'm considering playing hookey with my spouse on Friday to watch the Brazil-Netherlands game.  Maybe I can compare the two?  Get a publication?  lol
.

Without Precedent

This is absolutely beyond the pale; totally unbelievable; without precedent...  a true story:

I am working on a project this week with a couple other people.  They were doing their thing, I was going to the next part of the facility to make sure it was ready for my colleagues.  I went into a small aluminum foundry.  This is:
In a noisy location in the factory; clearly labeled as needing hearing protection; has been required for years.  As a matter of fact, I am the one who did the last noise monitoring, and am quite certain it's over the company's OEL.

Me:  are those ear phones?
Worker:  yes
Me:  you do realize those won't protect your hearing?  You do know you're supposed to be wearing earing protection, right?
Worker:  these are okay
Me: actually, no, they're not.  You need to have real ear plugs in.
Worker: it's not such a big deal.
Me:  The Safety Department is going to get on your case about this. Actually, I am getting on your case about it to.

Enter two other men, one of whom is a supervisor.

Supervisor:  What's going on?  friendly tone
Me:  I was just getting on his case about wearing hearing protection.  friendly tone
Supervisor to Worker:  How many times do we have to tell you? tone of frustration
Me:  (thinking "all right!")
Supervisor to Worker: is that a radio you're listening to?
Worker:  No
Supervisor:  come on   .tone of 'don't try to pull one over me'
Worker:  No, it's an iPod
Me:  Bah
Worker:  well it is; it's different
Me:  well the ear plugs are still not protecting your ears
Worker: they're okay
Me:  actually, no, they're not.  You're taking all of the noise in here already and just adding more noise to it.  You really need to use real ear plugs
Supervisor:  waves his hand dismissively and says "don't bother with it"

I was beyond stunned

Me to Supervisor:  Are you blowing me off?
Supervisor:  yes
pause
Me:  That is totally inappropriate.

Quite unfortunately, I was in the middle of leaving when this happened.  So, my immediate departure was likely percieved, or claimed to be, storming off in a snit.  When he said "yes" about blowing me off, he said it in a perfectly normal tone of voice as if it was perfectly natural and obvious.

I went off to an unoccupied part of the plant. Where I swore and cussed a lot. Loudly. Unfortunately some of it was heard by the other two contractors.  It doesn't happen often, that I get so totally enraged.  I waited until I had calmed down, then called the Safety Department manager.  I've worked for him before, and we have a good working relationship.  I asked him what I should or could do.  Unfortunately, the supervisor's ID badge had been flipped around, and I was stuck not being able to immediately identify him by name.

I figured I would just let it be until later.  The photographic org chart was on my desk; I could identify him with it.  Less than 30 minutes later, we were progressing on to the next area of the plant.  Lo, and behold! The supervisor was standing right there.  I was undertain to which group the area belonged, and we needed to know.  So, I walked over to the supervisor and asked him.  I figured this would be a perfectly natural thing to start talking to him; then bring up the issue of his disrespect.  Maybe manage to get his name.

Me:  "Is this area part of Section A?" 
Supervisor:  No, it's one of my areas.

Pow!  I was holding a list of the areas and corresponding supervisors.  At least I would have a name now.  About 5 minutes later, after my colleagues got started, I approached the supervisor again.

Me:  Were you serious when you said you were blowing me off?
Supervisor:  Not really
Me:  That wasn't particularly nice to do in front of the other workers. I was trying to help them.
Supervisor:  Well, you know they're not going to pay attention to you.  You're an independent contractor.  They'll listen to me because I'm another supervisor.

This was becoming surreal.

About half an hour later, my colleagues and I had progressed on to the foundry area.  They started their project.  I checked the worker.  Still no PPE.  I approached the only other worker there. He was wearing a different over-coat, and I thought he might be the team leader.  (The company has Manager > Supervisor > Team Leaders > Workers.)

Me:  Can you tell me who the team leader is?
Him:  I am.
Me:  I would appreciate it if you could tell your worker over there that he needs to wear ear plugs. (pointing at the worker)
Team Leader:  The Supervisor said those were okay.
Me:  Well, he was wrong.  They aren't okay.  They won't protect his hearing.

I leaned over to look at the worker again, since he had just started up another machine.

Me:  Well, perhaps you could go talk to him because right now there's absolutely nothing in his ears at all...



I give kudos to the man in question, since he at least had the balls to blow me off to my face.  Beyond that, though ...?

He has, pretty much without hope of redemption, completely lost all professional respect I might have had for him.  Pow! Five minutes and someone now thinks he's an ignorant schmuck.
.

IH standard baggage

While at work today, I stopped to talk to one of the workers, to explain what was going on regarding a project before the team arrived. I noticed rather quickly that his work station was particularly loud.  I asked if he was required to use hearing protection.  He said no, but then qualified his statement by pointing out he had only been on the job for 2 months.  Stunning me with his initiative, he walked to the next work station and asked his group leader.  No, no noise PPE required.

Not being convinced this assessment was correct, and being chronically curious, I went to the safety office to get a noise meter.  I returned, only to discover that the 2nd work station was no longer running.  Ah, well.  Loud, but not the same.

He asked me about what I was doing. I of course answered him,
explained there is a limit for how much noise you can have,
showed him the meter was measuring noise,
explained the meter read-out, and
explained how that number relates to the company's exposure limit.
He was satisfied and thanked me for my time.  Just what every IH wants, eh?

If only I hadn't needed to spend 10 minutes finding a noise meter!

I often find myself wishing I had a standard bag-of-tricks to carry around.  Sure, there's always the things I might personally really need, like a spare pair of non-prescription safety glasses that I know fit over my prescription glasses or ear plugs.  (I do always carry a spare set of ear plugs in my pocket - even if I'm already wearing mine.  I've given them away 2 times in the past 3 days.) With the advent of smaller and smaller electronics, I would definitely add a noise meter to the bag.  The one I used a couple years ago for my internship was pretty compact.  It wouldn't need to be fancy; only functional.  A Dräger hand pump (the simplistic kinds) with a set of tubes for VOCs and CO.  A particle meter. ... hmmm...  a professional shopping list.

Hazmat Hounds

Now this is the sort of thing that is just tooo strange to make up: What do you do with dog vomit after Fido eats the rat poison you stupidly left lying around? Question from health official: We have had two cases in the state recently where a dog has eaten zinc phosphide rat poison. The dog is rushed to the vet, they make it vomit and are overcome by the phosphine. We are going to send out an advisory suggesting that this procedure be performed outside of the facility, think behind the building, so we can get adequate ventilation. The issue then becomes what to do with the dog barf? Do we have them direct the dog to a plastic garbage bag and seal it up? Since we have had two cases of this there must have been others somewhere in the US, do you know of anyone who has an experience with it? Any suggestions would be appreciated. Response from EPA: Inducing vomiting is the right treatment. But acid or water causes decomposition and release of phosphine gas. Recommendation is to flood away barf with copious water, while wearing respirator. (Look up respirator in NIOSH) They recommend disposal in a DRY soil pit, but you have to get it there. Level B, or at least supplied air, is my best guess. What about Baking Soda, the all-purpose solution? At least it's not an acid. The following is from Google search on decontaminating sodium phosphide: SYNOPSIS A rodenticide of high mammalian toxicity which in the presence of dilute acid will decompose to liberate phosphine. It is not cumulative in body tissues. SELECTED PROPERTIES Physical characteristics: A grey powder of high melting point which sublimes when heated in the absence of oxygen. Solubility: Practically insoluble in water and ethanol. Soluble in benzene and carbon disulfide. Stability: Stable when dry but decomposes slowly in moist air. It reacts violently with acids with decomposition to the spontaneously inflammable phosphine gas. Vapour pressure: Very low. Phosphine odour detectable at 1.5-3.0 ml/m3 of air, depending on its purity.

Bitrex

Good heavens, this stuff tastes gross! Last night's class on respirators ended with a call for volunteers to go through a qualitative fit-test with a filtering face-piece respirator. How do you know if it's a respirator or a dust mask? If it says NIOSH, it's a respirator. There being only 6 people in the class, it's not as though one can hide in the back of the room. No one seemed to be leaping at the opportunity, so I volunteered. I guess there's benefits of being the oldest student - I'm pretty immune to most things that embarrass my younger classmates. I've never done qualitative fit testing before, only the quantitative method. They used bitrex as the sensory stimulus. They asked if I knew what it tasted like, simply to avoid having to check. I got a whiff of it once, being in close proximity to someone getting this done. Blech. Since we weren't waiting 1 minute for each of these activities (reading, turning head, lifting chin, etc), I was getting one whopping huge amount of bitrex pumped into the Bag On Head. They're looking kind of curious - I'm not sure why. The whole point is to demonstrate that even an N95 (read: not an N100) is perfectly capable of protecting against this stuff. Then ... wham. The standard bug-eyed, open mouth, sounds of disgust and grabbing for the hood. An hour later walking through campus with some classmates, I licked my lips only to realize it was still there. I think recommending employees rinse their face should be required, whether or not they fail. I failed on the step requiring someone to bend over. I'm not toooo surprised. It wasn't fitting really well under my chin. I was actually surprised it fit as well as it did. I'm curious about what size I was wearing - despite being a woman, I have a fairly broad face. I wear a size Large for full-face respirators, and depending on the manufacturer either Medium or Large for the half-face fitted ones. Yet another reason to offer multiple sizes to employees and make them try on more than one size. Of course you have them, because you're required to (1910.134 Apdx A - first point made) - but you should make them try more than one. Curiously, a rep from 3M told me that different chemicals are used in different countries. Not a surprising statement, eh? But ... apparently there is a distinct difference in sensitivity to some of the compounds. Americans have a lower sensitivity to one of the sweet-smelling chemicals, presumably due to the high sugar content of our regular diets.

Uncomfortable = Unworn

So, (state) OSHA-man shows up on Tuesday for a random, unannounced inspection. My employer (for whom I'm doing an internship) handles this much, much more calmly and professionally than my last place of employment would have. I asked my boss, the Health & Safety manager for the whole plant, if I could tag along for part of the inspection. I've never been involved in one from OSHA before. Ones from CDC, USDA, DoD, state-EPA, yes; strangely enough, not state-OSHA. I'm excited when the answer is yes. So, yesterday afternoon, the boss says, hey, come along. We leave, walk across half of the plant, and meet OSHA-man and some union woman. 30 seconds after I walk into the room, union-woman looks at me and says, "you aren't wearing safety glasses." I am not exaggerating or being flip, when I say, this was the most embarrassing moment of my entire professional career. 7 years of riding people about wearing safety glasses as a safety professional, 6 years of doing it as a chemist. I wanted to crawl into a hole. So, why weren't they on? They're uncomfortable. I just got bifocals, and am getting accustomed to them. The frames got a bit twisted and lost a nose pad. They're down right annoying and are giving me headaches. So, of course, I took them off in my office & put on my regular specs. If it isn't comfortable, people simply won't wear PPE.

Pop Culture PPE

If Bob the Builder can do it, so can you. Every time I've seen Bob the Builder (quite often with a 3 yr. old son), he always wears PPE. He was going at it with a jack hammer wearing: ear muffs, a hard hat, work gloves, and safety glasses. Working on a scaffold? Wearing a fall-harness. Brain wash 'em young to be safe. There is a balance in the workplace between 'safety' and 'practicality'. Hence having an hierarchy of controls, rather than just a monolith. This is particularly noticeable in Hollywood. In Batman Begins, Bruce Wayne is in the process of building the first Bat Suit, spray painting it Menacing Black. What is he wearing? Some short-sleeved shirt to make sure you notice Christian Bale has nice arms. But, he's wearing a nice half-face respirator. The filter cartridges of which do look like 3M's organic vapor/HCl/etc. No safety glasses, though. I suppose after paying an actor millions of dollars for his image, you need to make sure you get your money's worth. It's amusing. They make the effort to portray a character doing something that is "safe", when pretty much the only folks who would notice are the auto body repair mechanics or industrial hygenists. But Safety only gets a bit-part, a walk-on role, only enough so that ... what? Am I supposed to think Bruce Wayne is 'being safe'? Or did some costume director see some set design gal wearing a respirator while assembling and painting the sets, and think "... ooooh .... that looks kinda menacing?" And now Bat Man is wearing it because it fits in with the 'high tech' glamor going on in those scenes? And yet, only a few scenes later, while using a grinding wheel, he's got safety glasses on. What's the moral? Who cares why they're doing the right thing.