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Furious D
Location: Northern Ontario Gender: Male Total Likes: 294 likes
The Night Time is the Right Time
| | | Re: H2s or Hydrogen Sulfide in mines < Reply # 5 on 5/8/2020 7:28 PM > | Reply with Quote
| | | Posted by Deuterium
You said your monitor maxed out, but that doesn't mean much without telling the limit value. "If H2S levels are below 100 ppm, an air-purifying respirator may be used, assuming the filter cartridge/canister is appropriate for hydrogen sulfide. A full facepiece respirator will prevent eye irritation." cited from: https://www.osha.g...n_sulfide_fact.pdf I would trust it given the source. A respirator with correct cartridges like the 3M 6001 acid gas type gives you protection at a level that's considered a serious health hazard, and this assumption is for people repeatedly working eight hour shifts through it. It should be fine for exploration. You still have to watch for low O2 and high Co2 level which can cause asphyxiation.
| Some of the job sites I used to work at had 30% H2S concentration through the wells. That's 300,000 ppm. 10-15 ppm is the OHSA ceiling limit at which you don't need protection. 100 ppm can be fatal. On a gas well, even stepping in the wrong ditch or puddle can cause the concentration to jump from 10 to 1,000 ppm in the blink of an eye. We only used supplied air packs with positive pressure in a full face mask. I have never heard of anyone using a canister respirator for H2S work, but maybe in some environments where the concentration is controlled and you have consistent air flow I could imagine it. Where I worked a filter canister system would be absolutely useless. Not sure what a mine site would be like, but a canister mask might give you some extra time to get away. I would absolutely not stay if the gas monitor goes off. If it's buzzing, you gotta bounce. Also, keeping the monitor low, like putting it by your knee, can give you a better chance of detecting H2S, which is heavier than air. It also keeps it away from your face, where your breath can cause it to go off occasionally for low O2.
| "The time of getting fame for your name on its own is over. Artwork that is only about wanting to be famous will never make you famous. Fame is a by-product of doing something else. You don't go to a restaurant and order a meal because you want to have a shit." -Banksy The work of FuriousD: https://www.flickr...photos/opdendries/ |
| Sebk
Location: Michigan Gender: Male Total Likes: 8 likes
| | | Re: H2s or Hydrogen Sulfide in mines < Reply # 8 on 5/9/2020 1:05 AM > | Reply with Quote
| | | Posted by Furious D
Some of the job sites I used to work at had 30% H2S concentration through the wells. That's 300,000 ppm. 10-15 ppm is the OHSA ceiling limit at which you don't need protection. 100 ppm can be fatal. On a gas well, even stepping in the wrong ditch or puddle can cause the concentration to jump from 10 to 1,000 ppm in the blink of an eye. We only used supplied air packs with positive pressure in a full face mask. I have never heard of anyone using a canister respirator for H2S work, but maybe in some environments where the concentration is controlled and you have consistent air flow I could imagine it. Where I worked a filter canister system would be absolutely useless. Not sure what a mine site would be like, but a canister mask might give you some extra time to get away. I would absolutely not stay if the gas monitor goes off. If it's buzzing, you gotta bounce. Also, keeping the monitor low, like putting it by your knee, can give you a better chance of detecting H2S, which is heavier than air. It also keeps it away from your face, where your breath can cause it to go off occasionally for low O2.
| I specifically remember a safety video I had to watch and one of the scenarios was about a guy who fell into a ditch on his way to lunch trying to take a short cut to his truck and died. Not sure if it was real, but I assume it was as most of those safety videos are about an actual incident. I know I was told h2s cartridge filters where for escaping a contaminated area not prolonged exposure. I just assume not mess with the stuff on my free time as its scary stuff. I feel the risk of h2s outweighs the reward of whatever it is your exploring no matter how cool or unique it is and I'm not about to lug around a bunch of supplied air gear on my time off.
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| Samurai Vehicular Lord Rick
Location: northeastern New York Total Likes: 1902 likes
No matter where you go, there you are...
| | | Re: H2s or Hydrogen Sulfide in mines < Reply # 18 on 5/11/2020 11:15 PM > | Reply with Quote
| | | Posted by uLiveAndYouBurn
Oh shit now the active paper mill I've had my eye on seems even more risky, I think I'll finally pick up a gas analyzer.
| not to sound like an asshole, but an active paper mill is a pretty dangerous place to go larking around on. As I said, I worked in one for 11 years, pretty much everywhere but the powerhouse. With that said, my duties in the recaust plant did take me over there from time to time. That was one of the most frightening places I have ever been in. At the back end, you have chemicals and steam that can hurt or kill you. At the front end (paper machines, finishing and warehouse), you have steam and big heavy things getting out of control and running you over. I almost got wasted by an 81"w X 40"t roll of paper when it bounced out of the wrapping station, hit a bumpstop and bounced back at me... it weighed in at around 5000lbs. It would've been like getting run over by a truck. Anyways, just arrange a tour at the front office.
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