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Comments

Author Comment Last activity Moderation
gretchengehrke "@eustatic, no worries -- Mathew got this pretty far (complete, perhaps?). The video is embedded in this page: https://publiclab.org/wiki/formaldehy..." | Read more » about 3 years ago
gretchengehrke "That's such a good point @sarasage. That also ties into key elements about knowing your rights on public and private land and air space, states whe..." | Read more » over 3 years ago
gretchengehrke "There are a bunch of sensors commercially available through this vendor: https://www.grainger.com/category/ecatalog/N-1z0dwuc. Has anyone used one ..." | Read more » over 3 years ago
gretchengehrke "To add to @liz 's answer, the "criteria pollutants" are lead, ozone, sulfur dioxide, nitrogen oxides, carbon monoxide, and particulate matter. The ..." | Read more » over 3 years ago
gretchengehrke "Awesome, @Zengirl2. Thanks! " | Read more » over 3 years ago
gretchengehrke "Wow, thank you for this information @Zengirl2! Could you provide the paper citation here so we can look it up (since it didn't attach, and I honest..." | Read more » over 3 years ago
gretchengehrke "Hi @stevie, I'm not sure if this is on the market yet, but it looks like IBM is developing a chip that they're aiming to price at $200: https://www..." | Read more » over 3 years ago
gretchengehrke "Hi Mathew, There are three things that come to my mind: (1) To think more through Equation 1, I'm curious what P and T are. Pressure and Temp? (2) ..." | Read more » almost 4 years ago
gretchengehrke "Hi Patrick, I am also curious about when the fee is waived and when it's not. I know that in some counties (though I'm not sure if the county is al..." | Read more » about 4 years ago
gretchengehrke "Hi again, This document may be useful in deciphering situations in which CALPUFF would be more appropriate than AERMOD: https://www3.epa.gov/ttn/s..." | Read more » about 4 years ago
gretchengehrke "Hi Mary, This is a great question. I want to clarify that I don't necessarily think AERMOD is a bad model -- it just has draw-backs, and those draw..." | Read more » about 4 years ago
gretchengehrke "Hi @bkleist, Interesting stuff! What is your electricity situation and need for being inconspicuous like where you have the camera? I wonder if a ..." | Read more » about 4 years ago
gretchengehrke "Powerful speech. " | Read more » almost 5 years ago
gretchengehrke "Update: Received word back from the Kitagawa company. Unfortunately, they were of no help, simply saying that "...tube 710 is designed for monito..." | Read more » about 5 years ago
gretchengehrke "Just so this is recorded on this thread, here is my plan for moving forward: (1) Get information from the Kitagawa research team about co-contamina..." | Read more » about 5 years ago
gretchengehrke "Oooh -- nice find, @DavidMack! Thanks! " | Read more » about 5 years ago
gretchengehrke "Thanks, @warren, that would be great! I'll tag it for the blog too. " | Read more » about 5 years ago
gretchengehrke "Here is a picture of the DNPH cartridge used in the DOH analysis, and one of Gretchen learning to use the DOH instrument. " | Read more » about 5 years ago
gretchengehrke "Here are the graphs (not sure why they didn't show up in the original post): " | Read more » about 5 years ago