Mr. Drew R. Van Orden is a Senior Scientist at RJ Lee Group, Inc. and a Registered Professional Engineer, specializing in mineral engineering. As a Principal Investigator, he has conducted numerous on-site evaluations at mines and quarries. Mr. Van Orden has also designed and conducted numerous tests to assess worker exposures from various products. He is active in standards committees that develop analytical and testing specifications. His recent efforts have focused on evaluating talc quarries and powdered talc for possible contamination by amphibole asbestos. In these efforts, he is active in developing talc specifications and analytical methods. He has published in peer-reviewed literature and has testified in state and federal courts.

QUALIFICATIONS
• Registered Professional Engineer, Mineral Engineering, Commonwealth of Pennsylvania
• Active in ASTM D22 committees
• Member of the US Pharmacopeia Talc Committee
• Extensive experience in mineral process engineering, including process optimizations and plant automation
• Statistical analysis of complex data sets

AREAS OF EXPERTISE
• Asbestos
• Amphibole identification and quantification
• Mines and quarries
• Worker exposure
• Statistical analyses
• Quality control