True or False: Air tests are inconclusive without soaping and careful inspection for bubbles.

The statement is indeed true because air tests are often utilized to determine leaks in underground storage tanks (USTs). However, simply conducting an air test may not provide definitive results on its own. The process of soaping and inspecting for bubbles is crucial because it allows for the visual identification of even the smallest leaks.

When air is introduced into the tank, if there are any cracks, holes, or weak points, the escaping air may form bubbles when soapy water is applied to the exterior of the tank or piping. This visual confirmation is necessary because all leaks may not generate enough flow to be detected solely by pressure loss in an air test. Without performing the soaping procedure and closely inspecting for bubbles, the reliability and conclusiveness of the air test results can be compromised, making it essential to include this step in leak detection procedures.