Parts Per Billion (PPB) measures the concentration of a contaminant within a specific volume, expressed as the number of molecules of the contaminant per billion molecules of the total volume. It is a crucial metric used to ensure safety and compliance with environmental regulations.
Toxicity refers to the degree to which a substance can cause harm to an organism. In the real estate context, it often pertains to the contamination levels in properties, affecting their habitability and market value.
