What should be ensured to prevent migration of back fill materials?

The prevention of migration of backfill materials is critical in ensuring the integrity and functionality of underground storage tank systems. The use of filter fabric serves as a key component in this process. Filter fabric acts as a barrier that allows water to pass through while retaining soil particles and backfill material. This helps to maintain the stability of backfilled areas and prevents the fine particles in the backfill from washing away or migrating due to water flow. By placing the filter fabric around the backfill, it effectively reduces the risk of contamination, erosion, and structural instability, which can jeopardize the UST system's effectiveness and safety.

Regular inspections, while important for identifying potential issues over time, do not actively mitigate the migration of materials. Compacted fill can help in reducing voids and increasing stability, but without the barrier provided by filter fabric, it may still allow small particles to migrate under certain conditions. Clear signage on the site is geared more towards safety and organization rather than addressing the technical aspects of material migration. Thus, the implementation of filter fabric is a proactive measure specifically designed to address the concerns associated with the migration of backfill materials.