New article: A Caution on Using XRF Alone for Identification of Problem Drywall

In spite of recommendations by universities and the EPA, problem drywall cannot be adequately addressed using testing protocol that puts the emphasis on certain chemical elements as opposed to others.  Read about some flaws uncovered in data studies for testing toxic and Chinese drywall in A Caution on Using XRF Alone for Identification of Problem Drywall.