Gradient
Christopher Long is a principal at Gradient with over 20 years of expertise as a senior environmental health scientist, focusing on exposure assessment, risk assessment, and inhalation toxicology. Specializations include indoor and outdoor air pollution, airborne particles, and electric and magnetic field (EMF) assessment. Prior experience includes serving as a risk assessor at Menzie-Cura & Associates, Inc. Christopher Long holds a Doctor of Science degree in Environmental Health from Harvard T.H. Chan School of Public Health, a Master of Science in Environmental Engineering from the Massachusetts Institute of Technology, and an A.B. in Chemistry and Environmental Studies from Bowdoin College.
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Gradient
Gradient is an environmental and risk science consulting firm renowned for our specialties in Toxicology, Epidemiology, Risk Assessment, Product Safety, Contaminant Fate and Transport, Industrial Hygiene, Geographic Information Systems, and Environmental/ Forensic Chemistry. Since 1985, Gradient has employed sound science to assist national and global clients with resolving their complex environmental and human health challenges. Our scientists apply skills and expertise to challenging issues relating to chemicals in the environment, workplace and products. We work in a variety of fields affecting environmental and human health, including: Toxicology & Risk Sciences Exposure & Risk Assessment Epidemiology Ecological Risk Occupational Health & Safety Gene-Environment Interactions Chemistry/Forensics Chemical Fate & Transport Data Quality Management Remedial Strategies Air Quality Geographic Information System (GIS) Climate Impacts Water Resources Cost Recovery/Allocation Environmental Cost Estimation Global Chemical Registration & Notifications GHS Hazard Assessment Safety Data Sheet (SDS) Support Pharmaceuticals/ Biopharmaceuticals Medical Devices Predictive Toxicology Biocompatibility Nanotechnology Food Safety Green Chemistry & Alternatives Assessment