What type of back fill material should be used?

The use of free-flowing backfill material is essential in underground storage tank installation for several reasons. This type of material, often comprising sand, gravel, or a similar aggregate, allows for proper drainage and helps prevent the accumulation of water around the tank. Good drainage is crucial because standing water can lead to corrosion of the tank and compromise its structural integrity over time.

Moreover, free-flowing backfill provides support for the tank while allowing for soil movement and compaction without exerting excessive pressure on the tank itself. This is particularly important in preventing damage during soil settlement or other environmental changes.

Additionally, using free-flowing material ensures that any potential leaks can be quickly dissipated into the surrounding soil, reducing the risk of contaminants accumulating around the tank site. Proper backfill is a critical aspect of creating a safe and effective UST installation, aligning with environmental regulations and best practices.