Our Concentration Level Standards


The following chart shows the standards that we target. Most are National Ambient Air Quality Standards (NAAQS) from the US Environmental Protection Agencey (EPA). These health and safety standards are based on countless scientific studies over the past 40 years. The US EPA does not specify a safe level for Benzene, so we use Holland's standard.


chart of our standards


This chart is included in our sceintific paper, where you can find more details about our early field testing.F