Is it acceptable to use #9 stone for trench rock on a construction site?

Using #9 stone for trench rock on a construction site is not acceptable primarily because this type of stone differs significantly in size and stability compared to what is typically required for proper trenching applications. Trench rock, when used, needs to ensure appropriate drainage and prevent sediment from clogging the system. #9 stone, being smaller and more angular, does not provide the necessary weight and stability to support proper wastewater flow and can lead to issues such as settling or clogging.

Septic systems rely on a well-constructed drainage field that effectively handles the effluent. Typically, larger stones or gravel are preferred because they allow for better drainage while providing a more stable substrate that holds up under pressure. The use of appropriately sized aggregate material, generally in a range from #2 to #4 stone, is crucial for maintaining the integrity and function of the septic system.

This correct understanding reinforces the importance of adhering to prescribed materials for specific applications in construction and sanitation to ensure both performance and compliance with local regulations.