What is the minimum number of soil samples that must be collected from a soil matrix site?

The minimum number of soil samples that must be collected from a soil matrix site is two. This requirement is established to ensure that the data collected accurately represents the conditions of the site. One sample may not provide a reliable picture of the soil contamination or characteristics, as it could be influenced by localized variations. By collecting at least two samples, you increase the likelihood of capturing different conditions within the soil matrix, which is essential for a thorough assessment.

In environmental assessments, especially those related to potential contamination from heating oil tanks, variability in soil composition, moisture levels, and contaminant distribution is common. Sampling multiple locations allows for more comprehensive data that can lead to more informed decisions regarding remediation and safety measures. Collecting more than one sample is a standard practice in environmental monitoring and assessment for minimizing uncertainty in the results.