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Comments

Author Comment Last activity Moderation
gretchengehrke "@ottinger, the Air Watch Bay Area platform is exciting! Please do post updates. I appreciate the ability to print out a daily report that includes ..." | Read more » over 3 years ago
gretchengehrke "Thanks Gwen @ottinger! These are great resources. We have community members in central CA who have used IVAN for visual emissions -- it's good to k..." | Read more » over 3 years ago
gretchengehrke "That's so great, Shan! " | Read more » over 3 years ago
gretchengehrke "@carohowe, Agreed! I read a paper a while ago (which I can't seem to find now) that demonstrated higher instances of asthma in neighborhoods with f..." | 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 @carohowe, this sounds like an interesting project! In addition to broadly looking at the impacts of greenspaces, I wonder if it would be intere..." | Read more » over 3 years ago
gretchengehrke "@mienaikoe, This is so cool! How quickly can you process a liter of sea water? Also, you mentioned in your imgur post that you reversed the current..." | Read more » over 3 years ago
gretchengehrke "@shanlter, this is great! Have you seen the spreadsheet on the www.publiclab.org/wiki/water-sensors page? There are some other options there listed..." | Read more » over 3 years ago
gretchengehrke "Hi @MadTinker, oxidation-reduction potential (ORP) and power of hydrogen (pH) measure different chemical properties: ORP provides information about..." | Read more » over 3 years ago
gretchengehrke "As Mathew and David pointed out, there aren't readily available low-cost techniques for distinguishing among potential sources of particulate matte..." | 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 » about 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 " Sunrise at LUMCON. No filter! (photo by Gretchen Gehrke) " | Read more » about 4 years ago
gretchengehrke " Cocodrie early morning. No filter. (by Gretchen Gehrke) " | Read more » about 4 years ago
gretchengehrke " Cocodrie wetland. No filter. (photo by Gretchen Gehrke) " | Read more » about 4 years ago
gretchengehrke "Mary, this is great!!! I would love to work with you on it! " | Read more » about 4 years ago
gretchengehrke "It turns out that Alternative Method 82 is pretty strict in its procedure, so timelapse and video cameras wouldn't be able to explicitly do that me..." | Read more » about 4 years ago
gretchengehrke "Hi @sarasage, I just stumbled upon this nice (very basic) resource from the New York Department of Health about landfill gases. It might be useful:..." | Read more » over 4 years ago
gretchengehrke "To expand upon Liz's question, we’ve started talking about harnessing the unique power of open, collaborative science: the ability to massively rep..." | Read more » over 4 years ago
gretchengehrke "@wmacfarl, I completely agree with you there. Thanks for highlighting that. I also think that we need to provide more feedback options than "succe..." | Read more » over 4 years ago
gretchengehrke "Yeah, that would totally be an approach (and an affordable one, with ~$20 for kit plus 6 x $7 for tubes), but those tubes are not as formaldehyde-s..." | Read more » over 4 years ago
gretchengehrke "One method would be to measure various air quality parameters before starting to use the plant remediation unit and then successively over the cour..." | Read more » over 4 years ago
gretchengehrke "Wow! That is a seriously dusty road! Is "fugitive dust" subject to opacity regulations in Louisiana? I recently learned that fugitive dust (such as..." | Read more » over 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 » over 4 years ago