S02 - Attachment 02A - TANK 1 - NDP - API 653 Out-of-Service Inspection Report - 65 Pages.pdf

This document is an API-653 Out-of-Service External/Internal Mechanical Integrity Assessment report for Water Storage Tank #1 at the VA Medical Center in San Juan, Puerto Rico, conducted by Project Specialists of Puerto Rico, Inc. during January and March 2025.

The inspection found the tank to be in overall good condition but identified several maintenance requirements. The 1,000,000-gallon cone-roof tank, manufactured by Alonso & Carus Iron Works in 2007, requires repairs including: sealing the compromise between the concrete base and floor outer projection to prevent water seepage; cleaning and recoating the floor's outer projection displaying mild corrosion; tightening under-threaded anchor bolts; cleaning and recoating corroded hinge areas on shell-mounted nozzles; replacing severely corroded bolts on roof-mounted nozzles C & U; cleaning and recoating corroded flanges on roof nozzles A, C, D, F, K, L, M, N, O, P, Q, R, S, and T; repairing roof manhole E with completely deteriorated hinge and corroded neck; replacing corroded bolts on the center vent cover; replacing the completely detached level float and severely corroded guide tube; cleaning and recoating mild corrosion on the top handrail; replacing the severely corroded top shell course on the east side; and conducting internal coating repairs on the floor, shell, roof, and supporting structure. The ultrasonic thickness inspection revealed even corrosion patterns with adequate remaining thickness. Cathodic protection verification, magnetic flux leakage testing, and vacuum box inspection were completed with acceptable results. The inspector recommends monthly visual inspections by operations personnel and formal external visual inspections by a Certified API-653 Inspector within five years, with the next inspection due January 27, 2030.