Which classification applies when soil wetness is less than 36 inches below the surface?

Study for the North Carolina Septic Inspector Exam. Use detailed flashcards and multiple choice questions with hints and explanations. Get exam-ready today!

Multiple Choice

Which classification applies when soil wetness is less than 36 inches below the surface?

Explanation:
When evaluating soil for a septic system, the depth to wetness (how deep the soil stays saturated) is a key indicator of drainage. If the soil remains wet within 36 inches of the surface, there isn’t enough unsaturated, infiltrative soil for proper effluent treatment and dispersion. That poor drainage means the site cannot meet the standard design requirements, so it is classified as unsuitable. Provisionally suitable would mean there are some limitations that might be mitigated with design changes, which isn’t the case here. Suitable implies adequate drainage with no major limitations, and unclassified is used when there isn’t enough data to classify. The presence of wetness within 36 inches clearly shows inadequate conditions, leading to unsuitability.

When evaluating soil for a septic system, the depth to wetness (how deep the soil stays saturated) is a key indicator of drainage. If the soil remains wet within 36 inches of the surface, there isn’t enough unsaturated, infiltrative soil for proper effluent treatment and dispersion. That poor drainage means the site cannot meet the standard design requirements, so it is classified as unsuitable.

Provisionally suitable would mean there are some limitations that might be mitigated with design changes, which isn’t the case here. Suitable implies adequate drainage with no major limitations, and unclassified is used when there isn’t enough data to classify. The presence of wetness within 36 inches clearly shows inadequate conditions, leading to unsuitability.

More practice questions