We are back live with Mark Hernandez, PhD, PE this week on IAQ Radio. Our focus will be the Microbiology of the normal and water damaged built environment. Dr. Mark Hernandez received all his degrees, and did a post-doctoral tenure in the Civil and Environmental Engineering Department at the University of Colorado at Boulder. After several years of civil engineering practice, he joined the University of Colorado faculty in 1996, where he is now a full professor. Dr. Hernandez is a registered professional engineer, and an expert on the quantitation and remediation of bioaerosols; a generation of his research lies in characterizing the biological aspects of air pollution - both indoors and out. With respect to environmental investigations, his aerobiology characterization work has focused on large scale disasters including bioaerosols generated by major metropolitan floods. Dr. Hernandez's research group is based in an environmental microbiology laboratory, which houses the largest bioaerosol chamber in the United States, with full environmental controls. Since it's commissioning, this laboratory has been active in aerobiology research supported by the National Science Foundation, the National Institutes of Health (CDC/NIOSH), the US EPA and various private and public companies. Dr. Hernandez was a recent recipient of a Lindbergh Foundation Environmental award and a National Science Foundation's Early Career award for bioaerosol research.