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Gardner Trucking, Used Oil Tank, 22§CCR 66265.192, November 2019 <br /> A.1 Shell Service Life Evaluation <br /> The maximum inspection intervals are determined by the most restrictive shell course in regard to the remaining life and the corrosion <br /> rate calculations for each shell course using the following formulas: <br /> _ tact — tmin _ tprev — tact tact — tmin _ tact — tmin <br /> L' Cr Cr DY Iut — 2Cr I„ 4Cr <br /> Next <br /> Ultrasonic <br /> Corrosion Remaining Next Thickness <br /> Rate Life Inspection Inspection <br /> (in/yr) Cr (years) Lr (years) I„ (years) Iut <br /> 0.0002 >30 5 5 <br /> At the time of inspection, The Used Oil Tank meets the requirements for structural integrity in accordance with 22 § CCR 66265 & <br /> STI-SP001. <br /> 10 <br />