Which LTAR range corresponds to Soil Group IV?

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 LTAR range corresponds to Soil Group IV?

Long-term absorption rate (LTAR) shows how much wastewater soil can reliably absorb per unit area over time. Soils in Group IV are the most restrictive, with the lowest LTAR values due to very slow infiltration (think clay or compacted soils). That means their LTAR is in the low range, around 0.1 to 0.4 gpd/ft^2. The range 0.4 to 0.1 gpd/ft^2 matches this low capacity. The other ranges suggest higher infiltration rates and would correspond to soils in higher groups, not Group IV.

Long-term absorption rate (LTAR) shows how much wastewater soil can reliably absorb per unit area over time. Soils in Group IV are the most restrictive, with the lowest LTAR values due to very slow infiltration (think clay or compacted soils). That means their LTAR is in the low range, around 0.1 to 0.4 gpd/ft^2. The range 0.4 to 0.1 gpd/ft^2 matches this low capacity. The other ranges suggest higher infiltration rates and would correspond to soils in higher groups, not Group IV.

More practice questions