Ester Lovsin Barle
Global Head PSS
Ester Lovsin Barle is a global leader in product sustainability and stewardship, work experience to over 30 years, including 19 years in pharma. She holds a DVM, MSc, PhD, and MScTox degrees, and has extensive expertise in toxicology, occupational health, and environmental sustainability. Ester is the chair of ISPE Sustainability CoP.
DAY 1: May 28th, 2026
SESSION: Alignment of limits set for cross-over contamination and occupational exposure
◆ Clarifying two safety paradigms: Explain how PDE and OELs are derived.
◆ Understanding why limits diverge: Highlight how differences can lead to large PDE–OEL mismatches.
◆ Equipping experts for inspections: Provide inspection-ready guidance on articulating the scientific rationale behind both limit types.
