A huge cloud of ground mortar composed of 50 to 75% silica sand (which became microcrystalline and invisble dangerous silica particulates when ground) was released into our atmosphere without regard to the environment. Good contractors use removal tools with dust catching equipment attached so this does not happen. To grind without the proper dust control is a huge OSHA violation, but OSHA does not protect bystanders and home residents, only workers. These contractors unleashed the cloud with only a box fan in a window to mitigate dust dispersal, and that is NOT good. We had no choice but to flee until professional cleaners can come in and scrub the place and our air! The soap making tools are stuck in the no go zone! The thing that happened in our living room is quite similar to an operation called tuck pointing. Visit the CDC and OSHA to discover the dangers and the best ways of protecting yourself, should you ever need a similar operation done to your home, or if you want to do such work yourself. Some dust is way more than dirty. Some dust kills! Here is a link to get you started: www.silica-safe.org/know-the-hazard/why-is-silica-hazardous
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