Gradient

Senior Scientists

Jessie M. Kneeland, Ph.D.
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Education

Ph.D., Chemical Oceanography, Massachusetts Institute of Technology and Woods Hole Oceanographic Institution

S.M., Climate Chemistry and Physics, Massachusetts Institute of Technology

B.S., Geology, California Institute of Technology

Expertise

  • Chemical Fingerprinting
  • Organic Geochemistry
  • Oceanography
  • Climate Change Science
  • Chemical Registrations
  • Environmental Forensics
  • Fate and Transport

Jessie M. Kneeland, Ph.D.

Senior Environmental Chemist

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Dr. Kneeland is a senior environmental chemist with a diverse scientific background, including expertise in organic geochemistry, oceanography, and climate science.  At Gradient, she interprets chemical signatures to discern different sources of chemicals in the environment.  She also helps companies understand and comply with chemical registration requirements around the world.

Prior to joining Gradient, Dr. Kneeland taught environmental chemistry at Haverford College.  Her doctoral research involved identifying new chemical biomarkers of environmental stress in corals.  She also used chemical proxies from marine sediments to reconstruct ancient ocean temperature records and related those histories to known climate shifts.  Her scientific interests involve using chemical signatures to trace biological, chemical, and physical processes in the environment. 

Education

Ph.D., Chemical Oceanography, Massachusetts Institute of Technology and Woods Hole Oceanographic Institution

S.M., Climate Chemistry and Physics, Massachusetts Institute of Technology

B.S., Geology, California Institute of Technology

Expertise

  • Chemical Fingerprinting
  • Organic Geochemistry
  • Oceanography
  • Climate Change Science
  • Chemical Registrations
  • Environmental Forensics
  • Fate and Transport

Services

Representative Projects

Chemical Registration:  Analyzed existing data and identified data gaps to support chemical registrations in the EU (REACH), Australia, New Zealand, and China.  Coordinated with commercial laboratories to obtain the necessary chemical analyses.  Reviewed chemical dossiers for completeness and accuracy to facilitate efficient chemical registrations.

Hydraulic Fracturing Wastewater:  Conducted a literature search to characterize the chemistry of wastewater produced during oil and gas drilling and production.  Compiled and analyzed summary statistics on produced water and flowback chemistry to support a risk assessment of oil and gas drilling operations.

Data Quality Support:  Evaluated environmental sampling and analytical methods to support an assessment of data quality, reliability, and usability.

Chemical Forensics:  Performed a multivariate data analysis on organic contaminant data to differentiate potential pollutant sources in support of an equitable cost allocation at a Superfund site with a long and complex history of industrial activity.

Hydraulic Fracturing Impacts:  Analyzed US EPA and USGS data from drinking water and monitoring wells to assess concerns that hydraulic fracturing contaminants may have impacted drinking water resources.  Evaluated well construction records and potential chemical contaminants from monitoring well drilling and cementing.

Selected Publications

Kneeland, JM; Cohen, JM.  2015. "The Regulatory Framework for Read-Across and Surrogate Use for Hazard Assessment." Presented at SETAC North Atlantic Chapter Meeting, Freeport, Maine, June 10-12, 24p.

Kneeland, JM; Pizzurro, DM; Zhang, J.  2015. "Exempt Polymers: Are They Really Non-Hazardous?" Presented at American Chemical Society 19th Annual Green Chemistry & Engineering Conference, "Catalyzing Innovation: Smarter Research, Greener Design, Better World", Bethesda, MD, July 14-16, 19p.

Kneeland, J; Hughen, K; Cervino, J; Hauff, B; Eglinton, T.  2013. "Lipid biomarkers in Symbiodinium dinoflagellates: New indicators of thermal stress." Coral Reefs 32 : 923-934.

Kneeland, JM; Butler, EL.  2013. "Hydraulic Fracturing Fluid Forensics: Potential and Pitfalls." 20th International Petroleum Environmental Consortium Conference, San Antonio, Texas

Kneeland, JM; Mehler, WT; Lewis, A; Sharma, M.  2013. "Strategies for Registering Polymers of Low Concern in Multiple International Markets." Presented at the Society of Environmental Toxicology and Chemistry (SETAC) 34th Annual Meeting, Nashville, TN, November 22-23