A Guide to Asbestos Testing

Asbestos was used in construction products for decades because it is cheap, fibrous and heat resistant. In older Southern California buildings it still sits quietly in flooring, insulation, texture coatings and roofing — harmless while undisturbed, and a problem the moment someone starts cutting, sanding or demolishing.

Why testing happens before work starts

The purpose of an asbestos survey is to find out, before tools come out, which materials in the work area contain asbestos. That determines how the work is planned, who is allowed to carry it out, and how waste is handled. Discovering asbestos halfway through a demolition is far more expensive and disruptive than knowing in advance.

There is also a regulatory dimension. California treats asbestos as a recognised occupational and environmental hazard, with requirements administered through Cal/OSHA and local air districts, and the EPA publishes federal guidance on asbestos. Your contractor or local agency can confirm what applies to your specific project; requirements vary by building type and scope.

What a survey involves

An inspector walks the areas affected by the planned work and identifies suspect materials based on building age, construction type and the materials themselves. Where a material is suspect, a small bulk sample is collected under controlled conditions and sent to a laboratory for analysis. Air sampling may be used as well, depending on the project — for example to establish conditions before work or to monitor during abatement.

Sample collection is deliberately not a do-it-yourself task. Cutting, scraping or breaking a suspect material to “have a look” is exactly the activity that releases fibres. Leave suspect materials alone and let a trained person take the sample.

What you get back

The laboratory reports whether asbestos was detected in each sample and, where relevant, the type and percentage. The written findings identify the sampled materials and their locations, so you and your contractor can plan around them. Materials confirmed as containing asbestos are typically either removed by a licensed abatement contractor before the work proceeds, or left undisturbed and managed in place if the project allows it.

Common triggers for a survey

Renovation or demolition in a building constructed before the phase-outs of the late twentieth century; a property transaction where the buyer wants clarity; damage from fire, water or an earthquake that has already disturbed materials; and ongoing building management where a previous survey needs updating.

What testing does not do

A survey describes the materials sampled at the locations sampled. It is not a guarantee that no asbestos exists anywhere else in the building, and it is not a health assessment. Health questions about past exposure belong with a physician.

S&J Environmental carries out inspections, sample collection and air sampling and provides the laboratory findings. We do not perform abatement.