The actual application of the fireproofing is not a high silica producer. Mainly due to the “wet” product as it’s applied. It’s messy but keeping it wet keeps the silica from becoming airborne.

However, someone has to mix the dry product and make the slurry. This individual has an exhaust ventilation above (see picture). He/she opens the bag into the mixing hopper, adds water and then dumps it into the pump hopper. When opening the bag, a plume of dust escapes and may cause an issue.  The MSDS states 1 – 10 % quartz silica (by weight) in the bag. We will know the results in about 2 weeks. Look for the update.

These guys are building a top-notch building…