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Disaster recovery and restoration can be veiled in mystery to the many who have not undertaken specific training. This glossary explains technical terms to assist both report writing and the understanding of those technical terms so often misunderstood.
Definition
| Batt: |
Referring to insulation, batt material are those insulating materials that are common in walls and attics, and sometimes under a subfloor. See Insulation, R-Value |
| Boroscope: |
An instrument which can see inside wall cavities, ventilation ducting and inaccessible areas, to assess and inspect for surface contamination or the condition of the surrounding surfaces. Some boroscopes are battery light operated and they have a telescopic 45 degree angled mirror on top to inspect surfaces, while more sophisticated boroscopes work with laser-like precision, they can see for long distances and closer detail. These boroscopes can be connected to video recording units for later playback. |
| Brownian Movement: |
The random movement of particles suspended in motion with air or water. The Brownian movement phenomenon was observed in 1827 by Robert Brown, with the suspension of particles in liquid as observed under a microscope. While Brown theorized his observations had to do with living organisms, it wasn't until the turn of the 20th century kinetic theory was developed helping us to understand, thermal agitation of smaller suspended particles in motion as their mass, compared to true particles of larger surrounding bodies, are effected by kinetic energy. In 1905, Einstein considered the problem which led to an equation connecting the observed motions with the Boltzmann constant. The development being based on the law of equal partition of energy. Education Note: A smoke soot particle for example, is battered about in air on all sides by the high speed movement of air molecules. The soot particle is absorbing kinetic energy from every direction. In this example, the soot particle floating close to cooler surfaces such as a wall, glass window, stud nails to metal, tend to magnetically migrate towards and eventually cling to cooler surfaces. If the whole wall was cooler than the heated indoor air, such as from a fire, the whole wall would be uniformly covered by smoke particles. Quite often on a wall, stud nails or screws are even cooler than the wall surface and smoke particles deposit in a noticeable pattern. In the 1970's, U.S. Steel Corporation conducted a series of experiments to investigate how 'ghost marks' can occur in a building due to dust build up. U. S. Steel determined that a distinguishable particle deposition pattern began to occur on a surface when there was >3.3 degrees F. of difference in surface temperature relative to other parts of the surface. If this temperature varied > 8 degreed F., then surface discoloration by dust through a given time occurred. See Kinetic Energy |
| High-rise Drying: |
In water damage remediation, it is the use of mechanical and engineering controls necessary to dry a wet high-rise building properly. Investigation and Restorative Drying Note: a) High-rise or multi-story flood remediation requires a great amount of knowledge from building engineers about the building structural components, air pathways and ventilation, chases for electrical, elevator and ventilation shafts, pressure differentials between walls, plumbing and other conduit runs between floors. b) Drying a wood frame 4-story wood frame and floor building, can vary considerably, when attempting to dry a similar 4-story concrete high-rise having a pan floor for example. c) Finding all the sources of water intrusion and moisture vapor, can be half the battle in drying a wet high-rise building properly. See Substructure Drying, Building Drying |
| PAPR (Positive Air Pressure Respirators): |
Full-Face respirators which are positive air pressure fed from filtering canisters and a motor. The filtering canisters, motor and battery are on a belt worn around the waist. The supply hose comes from the filter housing to the full-face mask. PAPR respirators are the preferred respirator required for certain contaminates and confined space work, where heat-stress is a factor, when working in Level-C or B PPE. Safety and Health Note: PAPR respirators are only efficient if the appropriate filter canisters are in place! As a general filter canister rule, consider using HEPA/Organic/Acid Gas-type filters. OSHA Note: The contractor must provide the right filters relative to the contaminates involved. For H2S and SO2, only in-line air or SCBA can be used, because H2S and SO2 elements are gases, and filter canisters cannot screen out these gases. OSHA Note: All atmospheres where flammable, explosive air, gases, vapors, mists and toxins are present or are suspected, or the atmosphere may not contain appropriate breathable air, or because of the work involved an employee may create an atmospheric hazard, exceeding PM-10/50, proper monitoring and engineering controls must be implemented before employees can work in a hazardous environment. |
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The Disaster Advice Glossary operates on TechMerit Technoloy.
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