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gretchengehrke 360 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.



Joined over 3 years ago

Particle Visualization Event in Hixton, WI

by gretchengehrke 4 months ago | 4 | 284 | 1

Public Lab is hosting an event to visualize airborne particles from frac sand mining using samp...

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Net Neutrality: resources for action

by gretchengehrke 6 months ago | 2 | 3,312 | 2

Image obtained from: https://imgur.com/gallery/zfxwB Hi Folks, The FCC will likely be voting...

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Copper Sheet Hydrogen Sulfide Detection Activity

by gretchengehrke 8 months ago | 14 | 261 | 2

_This activity is an attempt to use Lionel Milberger's [copper rod hydrogen sulfide detection met...

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Hydrogen sulfide badges by Morphix Technologies

by gretchengehrke 9 months ago | 1 | 178 | 0

Hi Folks! I just found these hydrogen sulfide passive samplers that are made by Morphix Technolog...

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Creating a guide for community science action planning: first steps

by gretchengehrke 10 months ago | 3 | 151 | 2

Over the next few months, we're hoping to put together an interactive resource for people to use ...

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EPA Method 22: Visual Determination of Fugitive Emissions

by gretchengehrke over 1 year ago | 0 | 254 | 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 over 1 year ago | 2 | 437 | 5

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 over 1 year ago | 1 | 470 | 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 over 1 year ago | 3 | 586 | 5

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 over 1 year ago | 2 | 483 | 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 over 1 year ago | 2 | 861 | 3

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

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Activity Categories

by gretchengehrke almost 2 years ago | 8 | 584 | 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 2 years ago | 3 | 608 | 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 2 years ago | 3 | 1,785 | 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 2 years ago | 11 | 2,972 | 7

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 2 years ago | 6 | 2,091 | 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 2 years ago | 2 | 1,374 | 4

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

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Community Mapping to Reevaluate Space in a Refugee Camp

by gretchengehrke almost 3 years ago | 0 | 3,253 | 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 almost 3 years ago | 0 | 2,551 | 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 almost 3 years ago | 8 | 1,955 | 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 almost 3 years ago | 2 | 1,990 | 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 almost 3 years ago | 2 | 1,257 | 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 over 3 years ago | 4 | 1,983 | 2

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

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Determining wind direction with a kite and compass

by mathew about 1 year ago | 0 | 296 | 2

During [PM hotspot monitoring](https://publiclab.org/notes/mathew/04-28-2017/practicing-a-pm-hots...

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Refining the user interface of a community science app

by nshapiro 5 months ago | 5 | 179 | 3

Smartphone App for Residential Testing of Formaldehyde (SmART-Form) The [SmART-Form project]...

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Formaldehyde Monitoring Open Call on Tuesday, January 16th at 3:00 pm ET

by nshapiro 5 months ago | 1 | 482 | 1

Hi Everyone, We are hosting an Open Call on Tuesday, January 16th at 3:00 pm ET, to discuss an o...

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Silver Linings of Community Science

by mlamadrid 6 months ago | 0 | 120 | 0

Article by Gretchen Gehrke, Public Lab for [Commu...

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How is the changing environmental governance landscape affecting YOUR work?

by mlamadrid 6 months ago | 0 | 106 | 0

Article by Public Lab Staff for [Community Science Forum: Changing Environmental Governance Lands...

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how open data practices help science research

by liz 9 months ago | 0 | 249 | 1

lead image from https://www.nature.com/articles/s41559-017-0160 Posting an interesting article...

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Draft: Collect a sample for laboratory analysis

by warren 9 months ago | 2 | 319 | 2

This is a draft, adapted from the DIY Oil Testing guide, authored wi...

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Smartphone App for Residential Testing of Formaldehyde (SMART-FORM) Interim report

by nshapiro 10 months ago | 5 | 314 | 2

Below is the interum report of the NSF-funded SMART-FORM project, lead by Karen Dannemiller of Oh...

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Practicing a PM hotspot survey in New Auburn, WI

by mathew about 1 year ago | 5 | 379 | 2

Attempting a Hotspot survey in New Auburn, WI with: @Stevie, @Gretchen, @Warren, @marlokeno, Jonn...

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Site Survey for a Minivol

by mathew about 1 year ago | 0 | 432 | 1

Heather and Bruce Andersen live in Bloomer, Wisconsin, and want to setup a [MiniVol to identify d...

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Pollutant Discharge Permits

by mlamadrid over 1 year ago | 0 | 141 | 0

Article by Gretchen Gehrke for [Community Science...

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Interview: Chris Nidel on environmental evidence in court

by warren over 1 year ago | 0 | 568 | 5

A few months ago, as our first interview for the Environmental Evidence Project blog series (#evi...

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Public Lab awarded NSF funding to help develop low-cost community formaldehyde monitoring technique

by nshapiro over 1 year ago | 2 | 809 | 5

(Header image: A woman in Oklahoma attempts to document formaldehyde's effects on her son with he...

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What goes into choosing a topic name?

by liz over 1 year ago | 2 | 448 | 3

_above: sketch of figuring out how to organize "air" into a research area, and which methods are ...

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What makes a good activity?

by warren over 1 year ago | 13 | 906 | 3

In our continuing shift towards using the new Q&A feature and the new Activity grids as a framewo...

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The many types of evidence

by warren almost 2 years ago | 16 | 562 | 2

As a followup to our [introductory post](https://publiclab.org/notes/warren/08-18-2016/introducin...

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Q&A enables automated FAQ

by liz almost 2 years ago | 0 | 496 | 1

Asking and answering questions is at the very heart of Public Lab. It's how we get started, it's ...

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Check out these Activity Grids

by liz almost 2 years ago | 8 | 1,604 | 8

The sheer number of posts on publiclab.org by contributors from all over the world about 1) h...

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Introducing the Environmental Evidence Project, a blog series from Public Lab

by warren almost 2 years ago | 5 | 5,463 | 7

Hello everyone -- Jeff Warren and Gretchen Gehrke here, Public Lab's Research Director and Data Q...

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Plant Air Remediation Field Test #2 (Georgia)

by nshapiro almost 2 years ago | 6 | 2,082 | 5

This post is in collaboration with the community science practitioners of Silent Disaster, a g...

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Documenting Runoff with Photography

by mlamadrid almost 2 years ago | 0 | 559 | 0

Article by Gretchen Gehrke for [Community Science...

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Airborne Silica and Regulations

by mlamadrid almost 2 years ago | 0 | 508 | 0

Article by Gretchen Gehrke for [Community Science...

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What happens when the mining stops? Focus on Reclamation

by mlamadrid almost 2 years ago | 0 | 494 | 1

Article by Gretchen Gehrke, [Mathew Lippincott](h...

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When $100,000 is not enough: how citizen data (could) relate to government regulation

by liz over 2 years ago | 2 | 3,282 | 2

October 29, 2013: The headline on [airhugger.wordpress.com](https://airhugger.wordpress.com/2013/...

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How do I do website change detection and notification?

cfastie asked about 3 months ago

Answers by gretchengehrke

The difference between medical particle monitoring and your particle monitoring?

Accepted

Ag8n asked about 4 months ago

Answers by gretchengehrke

Formaldehyde levels

Ag8n asked about 5 months ago

Answers by gretchengehrke

Does Pennsylvania have air quality standards for hydrogen sulfide?

Accepted

gretchengehrke asked about 7 months ago

Answers by gretchengehrke

Are there air quality standards for hydrogen sulfide?

Accepted

gretchengehrke asked about 7 months ago

Answers by gretchengehrke

How to select a site for hydrogen sulfide testing?

warren asked about 7 months ago

Answers by gretchengehrke

When is it better to do grab sampling versus other types of monitoring?

Accepted

stevie asked about 8 months ago

Answers by gretchengehrke

How does the EPA measure things, especially the size of dust particles?

Accepted

kgradow1 asked about 9 months ago

Answers by gretchengehrke

Who is developing smart-form?

liz asked about 9 months ago

Answers by gretchengehrke

How do I collect a sample for laboratory analysis?

warren asked about 9 months ago

Answers by gretchengehrke

Natural Disinfectant

Mempet asked about 10 months ago

Answers by gretchengehrke

Water Filter Effectiveness

Mempet asked about 10 months ago

Answers by gretchengehrke

What are soil sampling protocols being used by groups along the gulf coast?

Accepted

stevie asked about 10 months ago

Answers by gretchengehrke

What do the terms attainment and nonattainment mean?

Accepted

liz asked about 11 months ago

Answers by gretchengehrke

What is your favorite program to plot data from a data logger?

gretchengehrke asked about 11 months ago

Answers by gretchengehrke

answered on Aug 03, 2017 0

answered on Aug 16, 2017 0

Show all 4 answers »

Sensor: ORP versus PH

Accepted

MadTinker asked about 12 months ago

Answers by gretchengehrke

View these maps at MapKnitter.org »

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