For general appraisers, this designation is awarded to those whose education and experience exceed state appraisal certification requirements and is supported by the National Association of REALTORSÂ®. Presented by National Association of REALTORSÂ®. Contact GAA program staff at 800-874-6500 ext.
Absorbent and. cushioning material. Triple packaging provides three layers of containment to protect. the substances being shipped. These layers are primary, secondary, and outer containers. The following diagram shows the basic concept of triple packages. Packaging of. Infectious Substances. Page 4 of 24.
The third layer is called Mesosphere, a layer that is 70km above the ground. The gases in the Mesosphere are too thin to absorb much of the sun's heat. Although the air is still thick enough to slow down meteorites hurtling into the atmosphere. They burn up, leaving fiery in the night sky. The 4th layer is called Thermosphere, the layer that is at a height of 200km above the Earth's surface. The gases of the Thermosphere are even thinner than those in the Mesosphere, but they absorb Ultraviolet light from the sun.