When consulting as an expert witness, having certifications can assist in establishing your credibility and qualifications. If you’ve perused the Curriculum Vitaes of the experts at The Warren Group, Inc., you may have seen some of these letters trailing after our names. What do they mean and what organizations grant them? The following is a sampling of some of the certifications our experts have acquired: (more…)
Most folks think that chemical hazards are strictly limited to manufacturing or other industrial sites. The fact that there are potential chemical hazards in the safe confines of their homes often comes as a surprise.
A surprising number of residential fires are caused by the spontaneous combustion of stain application materials. When an oil-based stain is applied to furniture or flooring, the oils react with the oxygen in the air to form very large polymer chains. The process of the liquid stain turning to solid barrier is called curing (it is not drying via evaporation) and the reaction is oxidation. This reaction generates heat. On the floor or chair, the heat dissipates into the room without an issue. That same oxidation reaction is occurring on the brush, towel, sponge, or rag that was used to apply the stain. If those materials are piled in a corner or in a trash can, the heat cannot dissipate. If there is enough product present, enough heat can be generated to (more…)
I’ve heard some people say that the term steam explosion is a malaprop because explosions involve combustion. However, if you look up the definition of explosion, you get this: “a large-scale, rapid, or spectacular expansion or bursting out or forth.” (Thanks, Meriam-Webster!!) If you’ve ever witnessed a steam explosion, you’ll agree that it is a MOST appropriate term!
Steam explosions occur when water or other liquid undergoes a sudden phase change (more…)
Around Christmas day of 2022, a mass of very cold air settled in the deep south/southeastern United States (where I live). It remained below freezing for over 24 hours. That is very unusual down here. There was a spate of burst pipes all over the area. Why? Water is one of a very few compounds that expands when it freezes…by approximately 9%!! If a volume of water is sealed off in a section of piping, and that water freezes, it is likely the pipe will rupture. Then, when it warms up again and thaws, liquid water will leave the pipe for an adventure!! (more…)
Across industry and construction sites, there are times when employees of different employers are working side by side, or at least on the same site at the same time. Some industry examples are when chemical plants have contractors on-site for routine maintenance or during process shutdowns for major overhauls or repairs. OSHA refers to these as multi-employer worksites. In December of 1999, they revised their citation policy which allows for more than one employer at a worksite to be cited for conditions that violate OSHA standards. (more…)
Previously, Warren posted the first installment of a series on losses associated with heating systems. The first article looked at central forced air furnaces. This new article will look at a common form of supplemental or secondary heat, oil filled electric radiant heaters. These heaters are commonly used to provide extra heating in areas that are lacking in central heating capacity. Another rationale for their use arises from manufacturer’s claims that the portable heating units can lower your power bill. This is based on (more…)
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