For the purpose of this article, I will be referring to the conversion of existing buildings of a different use to self-storage. These buildings may include retail stores, office buildings, schools, hotels, industrial buildings, and miscellaneous properties such as abandoned bus stations, underground parking lots, etc.
Bioassays: Background Information. A bioassay involves use of a biological organism to test for chemical toxicity. Perhaps the oldest and most commonly known example is the canary in the coal mine. Traditionally, coal miners have taken caged canaries down into the mines to help ensure a safe air supply.
DEXA currently is the easiest, most standardized form of bone density testing, so that's what we use, says Mary Rhee, MD, MS, an endocrinologist and assistant professor of medicine at Emory University in Atlanta. The DEXA scanner uses beams of very low-energy radiation to determine the density of the bone. The amount of radiation is tiny: about one-tenth of a chest X-ray. The test is painless, and considered completely safe.