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for the system to be raised at least 6 inches and allows for easy and adequate inspection beneath the tanks. Shells I Heads: ConVault Tank: The ConVault 6000 gal tank has some very slight evidence of minor hairline fractures,but no structural cracking on the outer concrete shell which has_been painted over and sealed, and does not rise to the level of shell fracturing. Uponft close inspection and test, this very minor level of fractures _ -- - does not, in any way, affect the - 771, secondary containment, but it is recommended that any _ observable fractures, when -9 discovered, be monitored and if there is any increase in the fracturing, which could lead to - structural cracks, that those cracks be sealed and the tank be repainted. As of the date of the inspection, there was no impact on the ability of the hank to maintain its integrity, nor any - visible evidence that the small underlying hairline fractures presented any articulable danger of increasing in severity or in scope, having been previously sealed and that the painting of the overall tank has been effective in preventing any further fracturing issues in addition to maintaining the overall integrity of the concrete shell be painted with a sealant to preclude any further expansion of cracks on the s outside of the tank. It is not unusual for a concrete clad tank to experience y some level of cracking over time in the field. However, it is not the type of issue which should be ignored for long, as cracks have a tendency to expand with weather and weight shifts of the system due to differences in product inventory and the fact that Central California is an earthquake zone. The ConVault 6000 gal tank does not evidence any structural cracking, although it can be assumed that since that tank also has been repainted, that there may have been