Senior Scientists

Ms. Chien is an environmental scientist with experience in human health risk assessment under federal and state regulations, calculating risk-based cleanup goals, assessing vapor intrusion, and managing databases for risk assessments.  Before joining Gradient, Ms. Chien worked as a scientist at Woodard & Curran where she conducted human health risk characterizations under Massachusetts and other regulatory frameworks, created and managed databases, and sampled various media in support of site assessment and closure activities.

Human Health Risk Assessment:  Conducted a human health risk assessment using US EPA guidance for a former MGP site currently divided into multiple residential and commercial properties.

Hazard Assessment:  Performed hazard assessments for various chemicals using data in accordance with United Nations Globalized Harmonized System (GHS) guidelines.

Risk Assessments for Former Manufacturing Plant: Conducted human health risk assessments for five sites associated with a former paint manufacturing plant.  Evaluated worker and residential exposures to constituents in multiple environmental media.

Prop 65 Evaluation of Styrene in an Industrial Product: Evaluated potential worker exposure to styrene from an industrial product. Modeled worker exposure to styrene via inhalation and incidental ingestion. Compared estimated intakes to the Prop 65 Safe Harbor Limit.