Backfill material on sewer lines should be selected material. Is this statement true or false?

Selecting backfill material for sewer lines is crucial for the integrity and longevity of the system. The statement emphasizes that backfill material should be qualified and treated as selected material, which is essential to ensure proper compaction, drainage, and support for the sewer pipe.

Using selected material helps prevent issues such as settling, which can occur if unsuitable materials like large rocks or debris are used. Poor backfill can lead to uneven loading on the pipes, which may cause fractures or misalignment over time. Selected backfill generally refers to material that has been screened and is ideally suited to provide appropriate support, prevent pipe movement, and allow for adequate drainage around the sewer lines.

Overall, the statement is true because utilizing properly selected backfill material is a best practice that enhances the performance and reliability of sewage systems. This ensures the system functions efficiently and reduces the potential for future repairs due to improper installation practices.