Must the mantle be placed in all directions from the absorption trenches?

Must the mantle be placed in all directions from the absorption trenches?

• A. Yes
• B. No
• C. Only toward the flow
• D. Only away from the flow

Answer: (B)

In absorption trenches, the soil cover you provide is meant to protect the trench and allow wastewater to infiltrate into the surrounding soil, not to completely encase the trench on every side. A mantle around the trench in all directions isn’t required and can actually hinder proper infiltration if it overly seals or compacts the sides. What matters is meeting the required cover depth and avoiding damage from heavy equipment, while ensuring the trench remains in contact with the surrounding soil to distribute effluent laterally through the soil profile. So, there’s no obligation to place a mantle in every direction from the trenches.

In absorption trenches, the soil cover you provide is meant to protect the trench and allow wastewater to infiltrate into the surrounding soil, not to completely encase the trench on every side. A mantle around the trench in all directions isn’t required and can actually hinder proper infiltration if it overly seals or compacts the sides. What matters is meeting the required cover depth and avoiding damage from heavy equipment, while ensuring the trench remains in contact with the surrounding soil to distribute effluent laterally through the soil profile. So, there’s no obligation to place a mantle in every direction from the trenches.