For this project, Matrix assessed and rehabilitated a 2.59-million-gallon Security Terminal Tank (STT) for Fountain Valley Authority (FVA). FVA was not aware of the tank’s maintenance history, and many believed only minor maintenance had been performed since the tank’s construction in 1981. Our Team evaluated the structural integrity of the tank, confirming code as well as health and safety compliance. The STT is essential to meeting local water demands and could only be taken out of service for a limited time between October and April. Due to this restriction, Matrix performed a floating assessment of roof components while the tank was in operation. This allowed a detailed assessment of critical structural components while FVA still supplied water to its customers.

The assessment proved that the tank needed repairs for long-term reliability and stability, and Matrix and FVA agreed that all critical maintenance items that affected water quality and structural stability had to be performed immediately. The primary scope of work for tank rehabilitation involved replacing steel rafters and recoating the interior and exterior of the tank. Matrix worked with the contractor to expediate design and review of the necessary rafter replacements to keep the project on schedule. Our Team provided additional construction support by performing daily construction observations, responding to requests for information and submittals, and preparing record drawings at the conclusion of construction.