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gretchengehrke 216 research notes and wiki edits

I'm the Data and Advocacy Steward with Public Lab, and am an avid environmentalist living in Durham, North Carolina. My background is in environmental geochemistry, and I am interested in the intersections and overlaps between environmental science and social justice. Joining Public Lab, I am looking forward to getting involved in environmental protection in a more tangible way.



EPA Method 22: Visual Determination of Fugitive Emissions

by gretchengehrke about 1 month ago | 0 | 12 | 2

**EPA Method 22: Visual Determination of Fugitive Emissions from Material Sources and Smoke Emiss...

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EPA Method 9: Visual Determination of the Opacity of Emissions from Stationary Sources

by gretchengehrke about 1 month ago | 2 | 19 | 4

This is a step by step guide to to assess the opacity of emissions, using EPA’s Method 9 “Visual...

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Colorado Regulations Hotsheet

by gretchengehrke 5 months ago | 1 | 394 | 5

As we start to work with community members in Colorado on issues emanating from oil and gas indus...

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Thoughts on Method 9 and its utility

by gretchengehrke 5 months ago | 3 | 382 | 4

Several people in our Public Lab community are concerned about various kinds of airborne emission...

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Oil Testing Kit Beta Challenge

by gretchengehrke 5 months ago | 2 | 379 | 1

_Image courtesy of _ This activity was developed for the [Oil Testing Kit Beta Challenge](...

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Common low-cost technique limitations and strategies for impact

by gretchengehrke 6 months ago | 1 | 379 | 1

With an environmental and environmental health focus, many people coming to Public Lab may be loo...

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Activity Categories

by gretchengehrke 7 months ago | 8 | 436 | 3

A bunch of people here in our community are interested in making our collective work more organiz...

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Oil Testing Kit -- Beta tests (with some needed re-dos)

by gretchengehrke over 1 year ago | 3 | 553 | 0

These are sets of spectra scanned using my Public Lab spectrometer and the oil samples provide...

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Coal Ash and Citizen Monitoring

by gretchengehrke over 1 year ago | 3 | 1,708 | 4

Photo credit: Living on Earth, http://loe.org/content/2014-02-14/1-dan-river.jpg As a reside...

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Formaldehyde Measurement: testing Public Lab's kit with DOH's equipment

by gretchengehrke over 1 year ago | 11 | 2,812 | 6

Formaldehyde is one of the most common indoor air pollutants, and is a known respiratory irrit...

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Intended Purposes for Different Tools and Techniques

by gretchengehrke over 1 year ago | 5 | 1,965 | 11

(Note: have a better name for this? Please suggest it!) Environmental data can be used fo...

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Photo Documentation of Turbid Waters for Advocacy

by gretchengehrke over 1 year ago | 1 | 1,262 | 3

Photo credit: Bill Hughes If you encounter a discolored stream, taking a photograph an...

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Community Mapping to Reevaluate Space in a Refugee Camp

by gretchengehrke over 1 year ago | 0 | 3,144 | 2

image by Claudia Martinez Mansell _see related note: http://publiclab.org/notes/claudsmm/08...

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Case Study: Ecological Assessment and Management using Balloon- and Kite-collected Aerial Images

by gretchengehrke over 1 year ago | 0 | 2,469 | 4

This is Part 2 of an ongoing series of case studies by Gretchen Ge...

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Case Study: Using Aerial Imagery to Pressure Industrial Polluters into Stormwater Compliance

by gretchengehrke over 1 year ago | 8 | 1,887 | 2

This is Part 1 of an ongoing series of case studies by Gretchen Ge...

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Oil Testing Kit -- mixing 5W30 20W30

by gretchengehrke over 1 year ago | 2 | 1,943 | 1

Since the oils in the Oil Testing Kit 5W30 and 20W50 are distinguishable by their fluorescence s...

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Oil Testing Kit -- discerning 5W30 20W30

by gretchengehrke over 1 year ago | 2 | 1,211 | 2

I am taking spectra of the five oils in the Oil Testing Kit, and I forgot to label one of the cu...

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Hydrocarbon standard samples for kits

by gretchengehrke about 2 years ago | 4 | 1,932 | 2

Hi All, We have some questions for prepping the [Oil Testing Kits](http://publiclab.org/wiki/...

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How can i know if my plant-based air filter is working?

liz asked about 6 months ago

Answers by gretchengehrke

Is CALPUFF a good air quality modeling tool

marlokeno asked about 6 months ago

Answers by gretchengehrke

answered on Sep 22, 2016 0

answered on Sep 22, 2016 0

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