Wildfires have been raging across California for the better part of a year, leaving a path of destruction across more than 1.5 million acres, and most recently, as a result of the Camp Fire, at least 29 people dead.
Wildfire damage can reach far beyond the flames. Since October 2017, collective smoke from the fires has twice traveled more than 3,000 miles to New York City, according to the National Weather Service. In August, smoke from the Bay Area fires was so thick, it left a dark cloud hanging over San Francisco for three days.
Many California building owners will need to assess smoke damage to both the interior and exterior of their properties.
What Smoke Leaves Behind
“Soot, char and ash are the typical constituents sampled on surfaces where there’s fire residue,” says Richard Wade, Ph.D., principal scientist at Omega Environmental Services. Smoke damage from wildfires can be determined from samples of the residual dust, Wade said. Omega also tests for other constituents such as asbestos and hazardous metal particulates which could be aerosolized and deposited in buildings.
To minimize smoke damage during a fire event, it’s best to close all windows and set the HVAC to 100% recycle mode to prevent the intake of outside air.
Assessing Wildfire Smoke Damage
Visual inspection and lab testing of multiple fire residue surface samples from both the interior and exterior of affected buildings are the only way to determine the extent of contamination from wildfire smoke. A variety of methods are used to collect fire particulate samples, including bulk sampling, tape-lift sampling and micro-vac. The visual evaluation and sampling will also include the heating, ventilating and air conditioning systems.
It is also important to measure pH levels in particulate to assess the corrosivity of fire residue, which can cause damage to a building’s contents as well.
While visual inspection and sampling are key to any effective evaluation of wildfire contamination, other details, including site history and the occupant activity, are taken into consideration to determine if other factors, like tobacco smoking or wood fires, have contributed to smoke damage.
How Omega Can Help
At Omega Environmental, we have decades of experience providing environmental assessment, remediation and decontamination, and expertise in the safe removal and management of environmental hazards in a wide variety of commercial and government settings, including assessment and remediation of wildfire smoke damage.
We partner with property managers, construction and engineering firms, and state, local and federal environmental officials to ensure safety and compliance. Contact us to learn more about how we can help your project move forward safely, cost-effectively and on schedule.