Where should samples be taken along piping for assessment?

Sampling along the piping for assessment is critical in identifying potential contamination or leaks in underground storage tank systems. The recommended practice is to take samples every 50 linear feet and at joints or elbows. This approach is effective because it balances thoroughness with practicality; taking samples at these intervals provides a representative assessment of the entire length of the piping while focusing on areas known to have higher risks of leaks, such as joints and elbows. These specific fittings are where the piping connections occur and are often points of failure due to stress, corrosion, or improper sealing.

Choosing to sample every 50 linear feet ensures that sufficient data is gathered to assess the integrity of the system without necessitating an impractical number of sample collections. As a result, this sampling strategy effectively minimizes the risk of missing any issues that could arise along the pipeline while still being manageable in the field.