Tactically_Fat
Tactically_Fat t1_jcgfe5y wrote
Reply to comment by Maktube in Open-source tool from MIT’s Senseable City Lab lets people check air quality, cheaply. by chrisdh79
Some things can be an excellent supplement - but when purple air readings are way off from properly calibrated, maintained, and audited Federal Equivalency Methods or Federal Reference Methods instruments - they leave a LOT to be desired. A lot.
ETA: things that involve moving air at rates that are supposed to be constant - and/or able to compensate for changing atmospheric conditions aren't quite the same as solid-state temperature sensors, rain gauges, or even wind vanes.
Tactically_Fat t1_jcgf4ya wrote
Reply to comment by hazpat in Open-source tool from MIT’s Senseable City Lab lets people check air quality, cheaply. by chrisdh79
Need to be able to audit flow.
And flow is related to temperature and pressure.
Agreed that a simple leak check can be peformed with a HEPA filter.
PM samplers that can/have met Federal Equivalency Methods status are all able to be calibrated to atmospheric conditions as well as having these things audited / verified.
A lot of this is done so that the data generated can be defensible should the need arise.
Tactically_Fat t1_jcgatc7 wrote
Reply to comment by Ut_Prosim in Open-source tool from MIT’s Senseable City Lab lets people check air quality, cheaply. by chrisdh79
The purple air samplers still can't be tested / audited, though.
Tactically_Fat t1_jcfscg5 wrote
Reply to comment by Domukin in Open-source tool from MIT’s Senseable City Lab lets people check air quality, cheaply. by chrisdh79
Purple Air sensors are...problematic and really cannot be relied upon.
There's no way to test/check them. Therefore, there's no way to determine if they're working properly. They are absolutely not approved in any fashion by the USEPA as any kind of reliable sampler.
Tactically_Fat t1_jcfs1jc wrote
Reply to Open-source tool from MIT’s Senseable City Lab lets people check air quality, cheaply. by chrisdh79
So does Air Now. https://www.airnow.gov/ - for USA.
Tactically_Fat t1_jaclzsh wrote
Reply to comment by Well_technically in Is this a good plan on removing a probable lead paint ceiling? by threwthelookinggrass
> EMSL Analytical
Way back when I was a Licensed Asbestos Building Inspector - this is the lab that my company would send our samples to for testing.
I've also recommended them to a co-worker who is soon to be remodeling his '30's bungalo-style home.
Also recommend EMSL.
Tactically_Fat t1_ja91pq1 wrote
Have the paint tested first.
And as /u/therealw00zy stated - you'll probably also really want to have the plaster tested for asbestos. SOME plasters used to contain it.
Have both things tested before proceeding.
You can probably do a simple Google Search for lead and asbestos testing in your area. Call a few and ask how they do it. SOME places will just let you bring in your samples in baggies - then charge a certain fee per sample.
Tactically_Fat t1_j6ok9bo wrote
Reply to comment by Mlpaddict in Study finds that poor sleep quality increases aggression, possibly by affecting emotional cognition by chrisdh79
Try drinking a nice cool glass of water ever few hours. It really helps me.
Tactically_Fat t1_jcgvy1s wrote
Reply to comment by -peas- in Open-source tool from MIT’s Senseable City Lab lets people check air quality, cheaply. by chrisdh79
> scientific accuracy
But that's, like, the only real way to know for sure. Otherwise - it's either speculation or generalization?
Accuracy, repeatability, and defensibility.