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Tank Shell Minimum Thickness and Remaining Life Calculations Date 03/04/2023 <br />File No. Report No. Client Tank No. Temp. (deg F) Initials <br />4100 Canary 3134A Canary <br />Renewables Corp.T-631 3134A 100 Gavin Kopp <br />SHELL REMAINING LIFE CALCULATIONS <br />Ca = tact-tmin = Remaining Corrosion Allowance (inch) <br />Cr = tprev-tact / Y = Corrosion Rate (inch/Yr) <br />RL = Ca / Cr = Remaining Life (year) <br />Y = 9 = Tank age (years) <br />Where: <br />Ca = Remaining corrosion allowance of the shell course under consideration, in inch. <br />Cr = Corrosion rate of the shell course under consideration, in inch per year. <br />FHc = Calculated fill Height = (SEtact/2.6DG+1) + (product height below course of interest), <br />in ft. <br />tact = Minimum thickness measurement of the shell course under consideration, as <br />recorded at the time of inspection, in inch. <br />tmin = minimum required thickness of shell course, at the maximum allowable fill height, in <br />inch. <br />tprev = previous thickness measurement of shell course under consideration, as recorded <br />at last inspection or nominal thickness if no previous thickness measurements, in inch. <br />RL = Estimated remaining life of the shell course under consideration, in year. <br />Y = Time span between thickness readings or age of the tank if nominal thickness is used <br />for tprev, in year. <br />tprev tact tmin Ca Cr RL FHc <br />Course 1 0.250 0.255 0.145 0.110 -0.00056 >40 52.12 <br />Course 2 0.250 0.262 0.107 0.155 -0.00133 >40 61.15 <br />Course 3 0.250 0.260 0.100 0.160 -0.00111 >40 73.61 <br />Coating was not removed for UT inspection data.