Which of the following is NOT a common cause of septic tank seepage field system failure?

The correct answer, which indicates that too frequent inspections are not a common cause of septic tank seepage field system failure, highlights the importance of regular monitoring and maintenance in ensuring the proper functioning of septic systems. Frequent inspections are a proactive measure that can prevent issues by identifying potential problems before they escalate into major failures.

Regular inspections can help in detecting early signs of malfunction, such as unusual odors, standing water, or slow drainage, allowing for timely repairs or adjustments. This oversight is crucial in extending the lifespan of the system and ensuring it operates efficiently.

In contrast, factors such as leaky fixtures, improper sizing, and non-suitable soil directly contribute to system failure. Leaky fixtures can lead to excessive inflow of water into the system, overwhelming it and causing it to fail. Improper sizing can result in either an under-capacity or over-capacity system, which can lead to inadequate treatment of effluent or overloaded drain fields. Similarly, non-suitable soil can affect drainage and treatment capabilities, leading to system backup or inadequate waste processing.

Therefore, the frequency of inspections does not cause failure; rather, it aids in maintaining the effectiveness and longevity of a septic system.