What is the best practice to avoid undermining the foundations of existing structures during excavation?

Choosing to proceed "carefully" during excavation is crucial because it significantly reduces the risk of undermining existing structures' foundations. When excavating near any foundational support, taking a meticulous and cautious approach allows workers to assess the surrounding soil conditions, monitor the stability of the adjacent structures, and utilize proper techniques such as shoring or bracing. This method ensures that vibrations or shifts caused by the excavation process do not negatively impact the integrity of established foundations.

In contrast, other approaches such as being tentative, quick, or simply efficient may overlook the necessary precautions, thereby increasing the likelihood of causing structural issues. A careful strategy prioritizes safety and structural integrity, making it the best practice for excavation in proximity to existing foundations.