1/ Ventilation levels around Colorado, USA.
I'll start reporting what I find in different places I happen to visit.
Here @shakeshack restaurant in Boulder, 950 ppm CO2, not good, esp. since lots of people and not one mask to be seen.
#CovidCO2 #ventilation
2/ At the hardware store @McGuckins
765 ppm, not bad. About 1/3 of people with masks.
3/ At the sports equipment store, @REI in Boulder.
1184 ppm. Too high. 1/4 of the customers and 1/2 of the employees with masks.
4/ At the supermarket, Trader Joes on Boulder (which fired an employee at another store a year ago for asking them to improve ventilation).
Good ventilation this time, 663 ppm. Few masks.
5/ At another supermarket in Boulder, @worldmarket Cost Plus.
718 ppm, not bad. 1/4 masked.
6/ At @bfly_pavilion in Westminster, Colorado, small zoo of invertebrates for kids (highly recommended!).
623 ppm in tropical butterfly exhibit, good. ~10% masking.
7/ At the playground in @B_flyPavilion invertebrate zoo, Westminster
904 ppm, a bit too high, given screaming kids (much higher aerosol emissions) and few masks.
8/ Back at @REI sports store in Boulder. Same as yesterday, too high despite very high ceilings.
9/ @Safeway supermarket at Iris.
Huge building, quite a few ppl, 10% masked, good ventilation
10/ Denver International Airport @DENAirport, bathroom immediately outside arrivals. Lightly occupied, few masks. Too high.
(And I was hearing some "aerosol generating procedures" going on in some of the stalls)
11/ Denver International Airport @DENAirport terminal.
Few masks. Not bad, could be better if ventilation is the only layer of protection we are relying on.
#covidCO2
12/ @DenverArtMuseum, good ventilation.
#covidCO2
13/ @DinosaurRidgeCO visitor center. Some masks. 1133 ppm CO2. Not enough ventilation.
#CovidCO2
14/ Denver Museum of Nature and Science @DenverMuseumNS.
Lunch area, not bad, 616 ppm
#covidCO2
15/ @kumandgo gas /charging station in Monument, CO. Medium occupancy, no masks other than us. Good ventilation (611 ppm), much better than other gas stations we've been to.
#covidCO2
16/ Chemistry building at the University of Colorado at Boulder @CUBoulder.
There are no classes right now, and the building is very well ventilated due to the work with chemicals. Very good.
17/ @hmartofficial Hmart Asian supermarket in Westminster. Few masks.
Too high CO2, above 1000 ppm consistently.
#CovidCO2 #COVIDisAirborne
18/ Orthodontist office in Boulder.
A couple of HEPA filters (too small for the rooms they were in), one off, one in a low setting. So basically decorations.
Few masks, mostly inadequate (surgical). Insufficient ventilation.
#covidCO2
20/ Periodontist office on Boulder, Col.
Few undersized HEPA filters that were on the lowest setting (mainly decoration), I put on max. Most ppl w/o masks. Dr. had surgical mask, put on KN95 upon my request. Poor ventilation up to 1800 ppm, opened window upon request
#covidCO2
21/ @gelato_boy ice cream store in Boulder. Staff and 95% of customers unmasked.
Door open, but still poor ventilation.
22/ At the Butterfly Pavilion @B_flyPavilion.
Unfortunately poor ventilation. 4% of the air we are everything has already been in someone else's lungs.
Few masks (maybe 5-10%).
23/ Back at @B_flyPavilion a month later.
Less ppl than last time. Ventilation just as bad. Few masks.
24/ @cava restaurant in Boulder.
1/3 full, few masks. We are dining outdoors.
Good ventilation.
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