- About Gradient
- Services & Projects
- Product Stewardship and Safety
- Risk Sciences
- Environmental Sciences
- Environmental Cost Analysis
- Global Regulatory Compliance
- People
- Principals
- Lisa A. Bailey
- Barbara D. Beck
- Andrew B. Bittner
- Teresa S. Bowers
- Eric L. Butler
- Joel M. Cohen
- David G. Dodge
- Samuel A. Flewelling
- Julie E. Goodman
- Kurt Herman
- Jessie M. Kneeland
- David E. Langseth
- Tom A. Lewandowski
- Ari S. Lewis
- Christopher M. Long
- David E. Merrill
- Michael K. Peterson
- Kim Reynolds Reid
- Lorenz R. Rhomberg
- Manu Sharma
- Peter A. Valberg
- Tim Verslycke
- A. Dallas Wait
- Senior Scientists
- Steven R. Boomhower
- Ali Boroumand
- Chase Butler
- Jonathan C. Callura
- Jiayang Chien
- Amy Dale
- Anna M. Engel
- Grace I. Greenberg
- Mary L. Hixon
- Laura E. Kerper
- John M. Kondziolka
- Cynthia J. Langlois
- Julie C. Lemay
- Charlotte Marsh
- Rosemary Mattuck
- Matthew J. Mayo
- Isaac Mohar
- Margaret C. Pollock
- Robyn L. Prueitt
- Kathleen A. Radloff
- James W. Rice
- Jeffrey T. Rominger
- Naomi L. Slagowski
- Meghna H. Swamy
- Rebecca C. Ticknor
- Caroline B. Tuit
- Matthew P. Tymchak
- Jiaru Zhang
- Research & Information Specialists
- Principals
- Evolving Issues
- News & Events
- Recent Scientific Papers
- Careers
- Directions
Just Events
Mar 15, 2021 | event
Gradient Presenting at the 2021 Society of Toxicology Annual Meeting & ToxExpo
Mar 15, 2021 | event
Mar 24, 2021 | event
Gradient Presenting at the 30th Annual International Conference on Soil, Water, Energy, and Air
Mar 24, 2021 | event
Jan 14, 2021 | event
Webinar Invitation: The Evolving Waters of the United States (WOTUS) Rule
Jan 14, 2021 | event
Dec 08, 2020 | event
Webinar Invitation Product Stewardship: Chemicals of Concern
Dec 08, 2020 | event
May 27, 2020 | event
McLane Middleton Webinar Featuring Gradient Scientist: Considerations for Re-Opening Your Business
May 27, 2020 | event
McLane Middleton Webinar: Considerations for Re-Opening Your Business May 27, 2020 1:00 p.m. to 2:00 p.m.
May 19, 2020 | event
Gradient COVID-19 Webinar: Perspectives on Workplace Re-Opening
May 19, 2020 | event
Tue, May 19, 2020 2:00 PM - 3:00 PM EDT
Apr 16, 2020 | event
SOT Virtual Meeting - Gradient Presentation Scheduled for April 16, 2020
Apr 16, 2020 | event
Feb 27, 2020 | event
Assessing Composting Regulations across States for the Protection of Environmental and Human Health
Feb 27, 2020 | event
Feb 16, 2020 | event
Barbara D. Beck Presenting at the American Association for the Advancement of Science (AAAS) Annual Meeting
Feb 16, 2020 | event
Mar 15, 2020 | event
Gradient Presenting at the 59th Annual Society of Toxicology Meeting
Mar 15, 2020 | event
Mar 16, 2020 | event
Gradient Presenting in the 30th Annual International Conference on Soil, Water, Energy, and Air
Mar 16, 2020 | event
Oct 07, 2019 | event
Gradient Presenting at 2019 MGP Site Management Conference
Oct 07, 2019 | event
Sep 10, 2019 | event
Gradient Presenting at the 2019 Product Stewardship Conference
Sep 10, 2019 | event
Aug 05, 2019 | event
Seminar: Environmental Risk Assessment Guideline Revisions and Perspectives
Aug 05, 2019 | event
Jun 25, 2019 | event
Gradient will Present at Air & Waste Management Association’s (A&WMA’s) 112th Annual Conference & Exhibition
Jun 25, 2019 | event
Mar 27, 2019 | event
Dr. Julie Goodman Testifies Before House of Representatives
Mar 27, 2019 | event
Apr 11, 2019 | event
Environmental Health Seminar - New refrigerants to address climate change: Risk, Perception, and Politics
Apr 11, 2019 | event
Mar 27, 2019 | event
Webinar Series on Complex Sediment Sites - Innovative Approaches to Source Identification and Cost Allocation
Mar 27, 2019 | event
Feb 11, 2019 | event
Gradient will Present at Battelle's Tenth International Conference on Remediation and Management of Contaminated Sediments
Feb 11, 2019 | event
Mar 31, 2019 | event
Gradient Presenting at the American Chemical Society Spring 2019 National Meeting & Exposition
Mar 31, 2019 | event
Mar 10, 2019 | event
Gradient Presenting at the 58th Annual Society of Toxicology Meeting
Mar 10, 2019 | event
Feb 11, 2019 | event
Gradient will Present at the Society for Protective Coatings Conference 2019
Feb 11, 2019 | event
Nov 04, 2018 | event
Gradient will Present at Society of Environmental Toxicology and Chemistry North America 39th Annual Meeting
Nov 04, 2018 | event
Oct 24, 2018 | event
Webinar Series - Navigating TSCA Reform: Evolving Chemical Hazard Evaluation Strategies for SMEs
Oct 24, 2018 | event
Oct 17, 2018 | event
Gradient will Present at 34th Annual International Conference on Soils, Sediments, Water and Energy
Oct 17, 2018 | event
Oct 01, 2018 | event
Gradient will Present at American Chemistry Council's Polyurethanes Technical Conference
Oct 01, 2018 | event
Sep 24, 2018 | event
Gradient Presenting at the 11th International Occupational Hygiene Association Scientific Conference
Sep 24, 2018 | event
Jul 17, 2018 | event
Gradient to Present at the Institute of Food Technologists (IFT) Conference
Jul 17, 2018 | event
Jun 25, 2018 | event
Gradient Presenting at Air and Waste Management Association (A&WMA) 111th Annual Conference & Exhibition
Jun 25, 2018 | event
Jun 18, 2018 | event
Gradient Presenting at 22nd Annual Green Chemistry & Engineering Conference
Jun 18, 2018 | event
May 14, 2018 | event
Gradient Presenting at Safer Choice Partner & Stakeholder Summit 2018
May 14, 2018 | event
May 22, 2018 | event
Ari Lewis Presenting at Utility Solid Waste Activities Group
May 22, 2018 | event
May 20, 2018 | event
Gradient Presenting at American Industrial Hygiene Conference & Expo
May 20, 2018 | event
Mar 11, 2018 | event
Gradient Presenting at Society of Toxicology 2018 Annual Meeting
Mar 11, 2018 | event
Feb 21, 2018 | event
Gradient Presenting at ICPHSO's 25th Anniversary Silver Jubilee
Feb 21, 2018 | event
Mar 18, 2018 | event
Gradient Presenting at American Chemical Society National Meeting
Mar 18, 2018 | event
Oct 12, 2017 | event
Webinar on Environmental Assessment of New Human Drugs – Regulatory Requirements and Lessons Learned
Oct 12, 2017 | event
Dec 10, 2017 | event
Gradient Presenting at Society for Risk Analysis Annual Meeting
Dec 10, 2017 | event
Nov 12, 2017 | event
Gradient Presenting at Society of Environmental Toxicology and Chemistry North American 38th Annual Meeting
Nov 12, 2017 | event
Oct 25, 2017 | event
Gradient Presenting at Northwest Occupational Health Conference
Oct 25, 2017 | event
Oct 16, 2017 | event
Gradient Presenting at Annual International Conference on Soils, Sediments, Water, and Energy
Oct 16, 2017 | event
Sep 27, 2017 | event
Gradient Presenting at Utilities Solid Waste Activities Group Decommissioning Workshop
Sep 27, 2017 | event
Sep 25, 2017 | event
Gradient Presenting in the Food Contact & Additives Conference
Sep 25, 2017 | event
Sep 19, 2017 | event
Gradient Presenting in the Washington State Governor’s Industrial Safety and Health Conference
Sep 19, 2017 | event
Jun 25, 2017 | event
Gradient Presenting at the Institute of Food Technologists Annual Meeting
Jun 25, 2017 | event
Jun 24, 2017 | event
Gradient Presenting at the Teratology Society 57th Annual Meeting
Jun 24, 2017 | event
Jun 20, 2017 | event
Gradient Presenting at the 50th Society of Epidemiologic Research Annual Meeting
Jun 20, 2017 | event
Jun 13, 2017 | event
Gradient Presenting at the 21st Annual Green Chemistry & Engineering Conference
Jun 13, 2017 | event
Jun 05, 2017 | event
Gradient Presenting at Air & Waste Management Association Annual Meeting
Jun 05, 2017 | event
Jun 04, 2017 | event
Gradient Presenting at American Industrial Hygiene Conference & Exposition
Jun 04, 2017 | event
May 22, 2017 | event
Gradient Presenting at Battelle Fourth International Symposium on Bioremediation and Sustainable Environmental Technologies
May 22, 2017 | event
Apr 05, 2017 | event
Gradient Presenting at American Association of Geographers April 5 - 9, 2017
Apr 05, 2017 | event
Mar 12, 2017 | event
Gradient Presence at 2017 Society of Toxicology (SOT) Annual Meeting
Mar 12, 2017 | event
Feb 20, 2017 | event
Tom Lewandowski Presenting at International Consumer Product Health and Safety Organization Annual Meeting and Training Symposium
Feb 20, 2017 | event
Dec 11, 2016 | event
Gradient Presenting at the Society for Risk Analysis (SRA) 2016 Annual Meeting
Dec 11, 2016 | event
Nov 06, 2016 | event
Gradient Presenting at the Society of Environmental Toxicology and Chemistry (SETAC) North America 37th Annual Meeting
Nov 06, 2016 | event
Dec 11, 2016 | event
Gradient Presenting at the Society for Risk Analysis (SRA) 2016 Annual Meeting
Dec 11, 2016 | event
Nov 06, 2016 | event
Gradient Presenting at the Society of Environmental Toxicology and Chemistry (SETAC) North America 37th Annual Meeting
Nov 06, 2016 | event
Oct 19, 2016 | event
Gradient Presenting at Northwest Occupational Health Conference 2016
Oct 19, 2016 | event
Oct 17, 2016 | event
Gradient to Present at the Association for Environmental Health and Sciences (AEHS) Conference
Oct 17, 2016 | event
Sep 25, 2016 | event
Gradient to Present at the 28th International Neurotoxicology Conference
Sep 25, 2016 | event
Apr 20, 2016 | event
Joel Cohen Speaks at Society of Risk Analysis on Nanoscale Materials
Apr 20, 2016 | event
Apr 16, 2016 | event
Gradient to Present at the Society for Chemical Hazard Communication
Apr 16, 2016 | event
Jun 25, 2016 | event
Leslie Beyer and Mary Hixon to Present at Annual Teratology Society Meeting
Jun 25, 2016 | event
Mar 14, 2016 | event
Gradient Presence at Society of Toxicology (SOT) Annual Meeting
Mar 14, 2016 | event
Feb 29, 2016 | event
Gradient Scientists to Speak at the International Consumer Product Health and Safety Symposium
Feb 29, 2016 | event
Feb 01, 2016 | event
Tim Verslycke attends SETAC Pellston WorkshopTM on Endocrine Disrupting Substances
Feb 01, 2016 | event
Feb 26, 2016 | event
Abigail Noble will deliver a platform presentation at the 2016 Ocean Sciences Meeting
Feb 26, 2016 | event
Nov 01, 2015 | event
Gradient will present at the Society of Environmental Toxicology and Chemistry (SETAC) North America 36th Annual Meeting
Nov 01, 2015 | event
Oct 19, 2015 | event
Laurent C. Levy will present at the 31st Annual International Conference on Soils, Sediments, Water, and Energy
Oct 19, 2015 | event
Oct 18, 2015 | event
Christopher M. Long will present at the 25th Annual Meeting of the International Society of Exposure Science (ISES)
Oct 18, 2015 | event
May 31, 2015 | event
Gradient to Present on Hydraulic Fracturing at AAPG Meeting
May 31, 2015 | event
Mar 22, 2015 | event
Gradient will Present at the Society of Toxicology (SOT) Annual Meeting in San Diego, CA. March 22-26, 2015
Mar 22, 2015 | event
Mar 22, 2015 | event
Gradient Abstracts Awarded Amongst Top Ten by the Risk Assessment Specialty Section of SOT
Mar 22, 2015 | event
Feb 24, 2015 | event
Tom Lewandowski to Speak at the International Consumer Product Health and Safety Organization (ICPHSO) Symposium, February 23-26
Feb 24, 2015 | event
Dec 07, 2014 | event
The Society for Risk Analysis (SRA) 2014 Annual Meeting will feature several Gradient presentations
Dec 07, 2014 | event
Nov 09, 2014 | event
Gradient will Present at the 2014 Society of Environmental Toxicology and Chemistry (SETAC) North America 35th Annual Meeting
Nov 09, 2014 | event
Nov 03, 2014 | event
Gradient to Present at Soil Science Society of America (SSSA) Meeting on Hydraulic Fracturing
Nov 03, 2014 | event
Oct 14, 2014 | event
Dr. Jessie M. Kneeland, Ph.D., will present "Global Chemical Registration Strategies for Oilfield Chemicals" at IPEC
Oct 14, 2014 | event
Apr 06, 2014 | event
Samuel Flewelling, Ph.D. and Matthew Tymchak, M.S. will present at the AAPG Meeting on Hydraulic Fracturing and Induced Seismicity on April 6-9 in Houston, Texas.
Apr 06, 2014 | event
Mar 23, 2014 | event
Gradient will have 15 presentations at the Society of Toxicology (SOT) Annual Meeting scheduled for March 23-27, 2014 in Phoenix, AZ.
Mar 23, 2014 | event
Gradient to Participate in Society of Toxicology (SOT) Annual Meeting with 15 Presentations, including a winner of the "Top 10 SOT Risk Assessment Abstracts"
Dec 09, 2013 | event
Gradient will Present at AGU Meeting on Hydraulic Fracturing and Induced Seismicity December 9-13 at the Moscone Conference Center in San Francisco, California.
Dec 09, 2013 | event
Dec 08, 2013 | event
Gradient will have nine presentations at the 2013 Society for Risk Analysis (SRA) Annual Meeting
Dec 08, 2013 | event
Nov 01, 2013 | event
Gradient to Present at 2013 Society of Environmental Toxicology and Chemistry (SETAC) North America Annual Meeting
Nov 01, 2013 | event
Nov 04, 2018 | event
Gradient will Present at American College of Toxicology 39th Annual Meeting
Nov 04, 2018 | event
Nov 01, 2018 | event
Gradient Presenting at The 2nd International Symposium on Alternatives Assessment
Nov 01, 2018 | event