Daniel A. Walker 🇨🇦🇺🇦🌻😷💉🚴🏻 (@danwalker9999) 's Twitter Profile
Daniel A. Walker 🇨🇦🇺🇦🌻😷💉🚴🏻

@danwalker9999

Retired geoscientist. 🪨💦⚒️🧭🗺️📈. Mineral exploration. Investigation and remediation of contaminated soil/water/sediment. PhD in hydrogeology.

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calendar_today08-01-2017 21:24:56

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Daniel A. Walker 🇨🇦🇺🇦🌻😷💉🚴🏻 (@danwalker9999) 's Twitter Profile Photo
Daniel A. Walker 🇨🇦🇺🇦🌻😷💉🚴🏻
@danwalker9999

24 days ago

CDC For a cheaper, quieter DIY air filter: the Corsi-Rosenthal box, as per Richard Corsi, PhD, PE (Texas) & Jim Rosenthal Single-page instructions from Shiven Taneja ⤵️ Other instructions elsewhere if you look Parts available from any big hardware store in 🇺🇸 🇨🇦; elsewhere, you’ll have to be creative

<a href="/CDCgov/">CDC</a> For a cheaper, quieter DIY air filter: the Corsi-Rosenthal box, as per <a href="/CorsIAQ/">Richard Corsi, PhD, PE (Texas)</a> &amp; <a href="/JimRosenthal4/">Jim Rosenthal</a> Single-page instructions from <a href="/ShivenTaneja/">Shiven Taneja</a> ⤵️ Other instructions elsewhere if you look Parts available from any big hardware store in 🇺🇸 🇨🇦; elsewhere, you’ll have to be creative