System maintenance is scheduled for Sunday, Sept. 29, 2019, 10 a.m. – 4 p.m. PDT. This will affect your access to Canvas, the online system hosting your course materials. We’re sorry for the interruption. Please plan ahead.
David J Keenan
DAVID J. KEENAN, B.S., is an environmental health and safety consultant with Performance Safety Associates. He has 34 years of experience in environmental health and safety. He has taught at UCSC Extension since 2001.