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gretchengehrke 348 research notes and wiki edits | Admin

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

Net Neutrality: resources for action

by gretchengehrke 2 months ago | 2 | 3,076 | 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 4 months ago | 14 | 202 | 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 5 months ago | 1 | 151 | 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 6 months ago | 3 | 125 | 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 12 months ago | 0 | 177 | 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 12 months ago | 2 | 278 | 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 | 452 | 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 | 543 | 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 | 461 | 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 | 765 | 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 over 1 year ago | 8 | 530 | 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 about 2 years ago | 3 | 594 | 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 | 1,762 | 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 | 2,935 | 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 | 2,061 | 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 | 1,349 | 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 over 2 years ago | 0 | 3,215 | 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 2 years ago | 0 | 2,530 | 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 2 years ago | 8 | 1,937 | 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 2 years ago | 2 | 1,976 | 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 2 years ago | 2 | 1,243 | 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 3 years ago | 4 | 1,966 | 2

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

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Refining the user interface of a community science app

by nshapiro 26 days ago | 5 | 127 | 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 about 1 month ago | 1 | 414 | 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 2 months ago | 0 | 96 | 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 2 months ago | 0 | 81 | 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 5 months ago | 0 | 219 | 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 5 months ago | 2 | 236 | 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 6 months ago | 5 | 265 | 2

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

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Determining wind direction with a kite and compass

by mathew 10 months ago | 1 | 240 | 2

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

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Practicing a PM hotspot survey in New Auburn, WI

by mathew 10 months ago | 5 | 333 | 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 11 months ago | 0 | 411 | 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 about 1 year ago | 0 | 112 | 0

Article by Gretchen Gehrke for [Community Science...

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Interview: Chris Nidel on environmental evidence in court

by warren about 1 year ago | 0 | 544 | 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 | 776 | 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 | 424 | 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 | 827 | 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 over 1 year ago | 16 | 547 | 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 over 1 year ago | 0 | 472 | 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 over 1 year ago | 8 | 1,565 | 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 over 1 year ago | 5 | 5,440 | 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 over 1 year ago | 6 | 1,977 | 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 over 1 year ago | 0 | 519 | 0

Article by Gretchen Gehrke for [Community Science...

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Airborne Silica and Regulations

by mlamadrid over 1 year ago | 0 | 429 | 0

Article by Gretchen Gehrke for [Community Science...

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What happens when the mining stops? Focus on Reclamation

by mlamadrid over 1 year ago | 0 | 470 | 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 | 3,221 | 2

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

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Formaldehyde levels

Ag8n asked about about 1 month ago

Answers by gretchengehrke

Does Pennsylvania have air quality standards for hydrogen sulfide?

Accepted

gretchengehrke asked about 3 months ago

Answers by gretchengehrke

Are there air quality standards for hydrogen sulfide?

Accepted

gretchengehrke asked about 3 months ago

Answers by gretchengehrke

How to select a site for hydrogen sulfide testing?

warren asked about 3 months ago

Answers by gretchengehrke

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

Accepted

stevie asked about 4 months ago

Answers by gretchengehrke

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

Accepted

kgradow1 asked about 5 months ago

Answers by gretchengehrke

Who is developing smart-form?

liz asked about 5 months ago

Answers by gretchengehrke

How do I collect a sample for laboratory analysis?

warren asked about 5 months ago

Answers by gretchengehrke

Natural Disinfectant

Mempet asked about 6 months ago

Answers by gretchengehrke

Water Filter Effectiveness

Mempet asked about 6 months ago

Answers by gretchengehrke

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

Accepted

stevie asked about 6 months ago

Answers by gretchengehrke

What do the terms attainment and nonattainment mean?

Accepted

liz asked about 7 months ago

Answers by gretchengehrke

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

gretchengehrke asked about 7 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 8 months ago

Answers by gretchengehrke

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

liz asked about over 1 year ago

Answers by gretchengehrke

View these maps at MapKnitter.org »

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