Are low PID readings sufficient data to complete a UST site assessment?

Low PID (Photoionization Detector) readings are not sufficient on their own to complete a UST site assessment because they provide limited information about the presence and concentration of contaminants in the subsurface environment. While PID readings can indicate the potential presence of volatile organic compounds (VOCs), they do not specify the types of contaminants or their concentrations accurately over a large area or depth.

Analytical data, obtained through laboratory analysis of soil, groundwater, or other samples, is needed to confirm the nature and extent of contamination. This data can provide quantitative measurements of specific contaminants, allowing for a more comprehensive understanding of risks and necessary remediation strategies. Therefore, relying solely on low PID readings without comprehensive analytical data would not give a complete picture of site conditions, which is critical for informed decision-making in the context of environmental safety and regulations associated with UST sites.