What is a common consequence of leaving a trench for lateral lines open during rainfall?

Leaving a trench for lateral lines open during rainfall can lead to water pooling, which is a significant concern in septic system maintenance. When the trench is left exposed, rainwater accumulates in the trench, saturating the surrounding soil. This pooling can hinder the absorption capacity of the soil, as the soil becomes overly saturated, making it difficult for wastewater to be properly treated and filtered. Proper drainage is crucial for the effective functioning of lateral lines, and if excessive water from rainfall collects in the trench, it can ultimately compromise the septic system's performance. Additionally, pooling can lead to potential overflows and backups, posing health risks and environmental issues. Thus, managing trench conditions during rainfall is vital for the optimal operation of septic systems. This is why the idea of water pooling is highlighted as a common consequence.