AL Sewer Projects Practice Questions - Alabama Sewer Projects Contractor Examination Exam

During installation of absorption trenches, why is smearing of wet trench sidewalls a concern in fine-textured soils?

Smearing increases the tank's liquid capacity Smeared surfaces can seal the soil interface and reduce infiltration into the field Smearing is required by ADPH for all installations Smearing eliminates the need for aggregate or chambers

Correct Answer:

Smeared surfaces can seal the soil interface and reduce infiltration into the field

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