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This almost looks like you could group the patches better. Hard to know without a tape in hand. 24" is max width of patch. The three left side of photo patches almost like you could fit 24" width and something longer like 36" inward toward center of tank. It may cover more than one corroded area...

STI is a less stringent version of 653, which my be better suited for smaller diameter tanks. In my experience, your best bet will be requesting a 653 inspection agency to send an inspector who is also STI certified. Some STI standalone inspectors are less familiar with tanks. I say this cause...