7.9 MG Equalization Tanks

Project scope included provided engineering, fabrication, erection and coating of two (2) 7.9 million gallon welded steel reservoirs. Foundation design for each tank required 449 concrete piles 60 to 65 feet deep, due to ground soil having extremely high liquefaction potential during a seismic event.
The project takes highly treated wastewater and purifies it through a three-step process that includes micro-filtration, reverse osmosis and ultraviolet light with hydrogen peroxide and then uses it to recharge the groundwater basin. It is the world’s largest advanced water purification facility of its kind prior to this expansion project, producing up to 70 million gallons of new water every day.
Each tank is 216 ft. diameter x 32 ft. shell height with a three bay roof structure. Construction of the two tanks utilized over 1,380 tons of steel. Both tanks were shop blasted and primed prior to field application of high performance 100% solids coating system on the full interior. It is estimated that the life-cycle of the tank coatings is 50 years.