As part of a larger capital program, an active refinery aimed to expand its footprint for 14 tanks and four pump pads. Before construction could begin, ENTACT performed subsurface soil treatment to address soft saturated soils, reducing potential settlement of the new structures. This comprehensive ground improvement approach ensured the structural integrity of the new tank foundations and pump pads, meeting project objectives and performance criteria. On this project, ENTACT:

• Installed a series of eight-foot diameter soil-cement columns on a grid beneath each tank foundation
• Constructed overlapping columns along the footprint of each future tank foundation ring
• Utilized two in-situ vertical auger mixing rigs and grout batch plants concurrently for efficient soil mixing
• Conducted treatability studies in our in-house laboratory to optimize reagent and delivery methods
• Treated 205,000 cubic yards using Type I-II Portland cement