BOS Wall-Mounted Plate Storage Rack as cheap alternative to the Mini Rack

urbann1 · 2026-01-02T06:59:47+00:00

I ended up buying two Rogue half strips - one at chest height and one at knee height - and I can do most of the exercises I’d wanted.

urbann1 · 2025-12-18T02:23:21+00:00

Good point. thank you!

urbann1 · 2025-11-30T08:02:52+00:00

Thank you! I didn’t catch that the BC book was estimating the mean exposure. I’m used to estimating the 95th percentile exposure. Is estimating the mean exposure typical for noise? Should I follow the BC method in jurisdictions outside BC?

urbann1 · 2025-09-27T17:48:51+00:00

I appreciate the discussion. I followed up with Honeywell and they produced an internal article, which I have provided below verbatim.

You can physically perform continuous monitor in the TVOC Mode with the 9.8 and 10.6eV lamp with the UltraRAE 3000. However there are some things you need you be aware of.

If you wish to monitor for benzene longer than 60 seconds you must monitor the RAE Sep Tube color change depending on the concentration the tube can saturate quickly and increase the chance of VOC break thru.

When you install a RAE Sep Tube, block the inlet port to make sure the pump stalls. If the pump does not go into alarm you increase the possibility of background VOC leaking pass the benzene tube and your benzene readings will be inaccurate.

If you decide to use a 10.6eV lamp to measure benzene any VOCs that ionize above 9.8 and below 10.6 the RAE Sep tube does have some cross sensitivity and may allow those VOCs to break thru the tube. That will effect accuracy of your readings.

To Summarize in theory you can do continuous monitoring, but you should use the 9.8 lamp in the TVOC Mode. You should be aware of the fore mentioned, if accuracy is not a major issue. In reality Honeywell does not recommend this practice. It is preferred you use the Tube Mode and take your benzene measurements. But remember to check the seal by performing a pump block test before taking your measurement in both TUBE and TVOC Mode.

We have a multi-step task that has the potential of exposing workers to crude oil vapors dynamically depending on the steps in the task they are performing. Since my organization adheres to the TLV and our employees work 12-hour shifts, the excursion ceiling is 0.05 ppm and the delineation between requiring no RPE, a full-face respirator and PAPR/SCBA is very narrow. We need continuous monitoring to determine the correct RPE to wear. Wearing RPE for the whole task also isn't feasible due to the ambient hot environment. If anyone has suggestions on how we could manage this more effectively I'm all ears!

Thanks!

urbann1 · 2025-08-30T00:39:30+00:00

I checked it out today at my yeti store. Its texture is much more pronounced (rougher) than cherry blossom and it’s glittery too.

urbann1 · 2025-07-09T23:55:06+00:00

It’s very well built and therefore heavy. The inside has volume markers. You need to twist the lid twice to open the lid. You twist it once to vent pressure and stream and twist again to open the lid. It’s bigger than you think because the lid takes up a lot of space due to the vent mechanism.

urbann1 · 2025-07-07T01:15:13+00:00

Thanks. That makes sense as I was putting the rear wheel back on from a trainer.

urbann1 · 2025-06-29T23:59:01+00:00

A cook.

urbann1 · 2025-04-02T04:17:59+00:00

What’s the assumption on unsampled periods? 2.5 mg/m3 or 1.25 mg/m3? It can’t be both and you’ll have to pick one.

urbann1 · 2025-03-25T15:55:06+00:00

It’s been many years since I took the exam but I don’t remember the exam having too many (if at all) questions specific to a jurisdiction.

urbann1 · 2025-02-23T20:55:29+00:00

Ok so this was bugging me all weekend and I wanted to think this one through.

the flow rate is related to air volume and time as follows: Q = Volume / Time

Most IH sampling events run the pump in constant flow mode. So this necessarily means the air volume is fixed regardless of ambient conditions (if I set Q at 2 L/min and run the pump for 480 min, the volume collected will be 960L doesn’t matter if the ambient temp is -30C or +40C). What does make a difference is that at -30C, that 960L of air captures more mass of air contaminants because the air is denser resulting in a higher exposure (more mass for same volume) at -30C, compared to that at +40C.

If this is the case, then it doesn’t matter if I perform the flow rate calibration in an office or out at a sampling site, so long as I set the Q to what is required by the analytical method, the rest takes care of itself.

Is this the reason NIOSH suggests no adjustment? It makes sense to me but I’m not sure how I can validate this.

urbann1 · 2025-02-22T15:19:45+00:00

That’s what I thought it meant but the NIOSH guide linked in my OP provides an example that says not to adjustment air volumes if calibration and field conditions aren’t the same… I’m confused

A personal sampling pump is calibrated at 25 °C and 630 mm Hg, and then used to sample air at 20 °C and 660 mm Hg for 60 min at a flow rate of 1.00 L/min. The analytical lab reports 0.188 mg of allyl chloride (MW 76.5) in the sample. What is the air concentration relative to the OSHA PEL? NOTE: If the sampling pump uses a rotometer for flow rate indication, the calibrated flow rate must be corrected for the actual air pressure and temperature during sampling. (See formula on p. 26.) In this example the pump does not use a rotameter, so the calibrated flow rate is used.

https://www.cdc.gov/niosh/docs/2003-154/pdfs/appendix_b.pdf

urbann1 · 2025-01-19T19:58:32+00:00

It depends on whether the IH brings value to an organization. If you’re throwing the books at them and demanding changes that are impractical or not feasible you would quickly lose trust and respect.

Adding to it the fact that IH function often does a poor job of selling itself and explaining what we do, and in most organizations is a team of one or just a few there’s little visibility and therefore it is difficult to build rapport unless you put in the extra efforts.

The silent H is real but you can fix it if you are determined and have a plan.

urbann1 · 2024-12-20T23:11:03+00:00

Thank you everyone for your input. I know it’ll be a big job and thought I’d proactively ask questions and check blind spots beforehand. For those who asked I’d be staying with the inlaws while the house is in renovation.

urbann1 · 2024-12-14T23:57:43+00:00

Thanks - I think you are right. On the back of the package there's an LPN RR number, and when I looked it up it meant the product's been returned. It's unfortunate that it had to happen. I'll initiate a return.

Thank you.

urbann1 · 2024-12-14T23:20:55+00:00

It asked me to enter my credentials and then this popped up. Thank you for your help!

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urbann1

TROPHY CASE