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0 0 <br /> API 653 Out-of-Service Inspection Report <br /> for <br /> J.R. Simplot Inspection <br /> Tank No. 8 August 27-28,2008 <br /> Lathrop, CA Page 17 of 54 <br /> 4.2.2 SERVICE INTERVAL <br /> Based on the MFL scan, the next internal inspection should be conducted within 11 <br /> years(ref. API 653, Para, 4.4.5). <br /> Nominal Bottom Plate Thickness(inches) 0.375 inch <br /> Maximum Underside Corrosion Depth 0.175 inch <br /> Maximum Internal Corrosion Depth 0.030 Inch <br /> Minimum Remaining Thickness at Next Inspection(MRT) 0.100 inch <br /> Year of Inspection(Yi) 2008 year <br /> Year of Construction(Yo) 1987 year <br /> Minimum Remaining Thickness from Underside Corrosion after Repairs(RTbc) 0.240 inch <br /> Minimum Remaining Thickness from Internal Corrosion after Repairs(RTip) I 0.240 inch <br /> Underside Corrosion Rate(UPr) 0.0064 inchlyr <br /> Internal Corrosion Rate(StPr) 0.0064 inchlyr <br /> Repaired Underside Corrosion Evaluation(assume 0.25 patch): 0.250 in Patch Plate Acceptable <br /> (per API 653 4.4.7:1,UPr Def.) <br /> r <br /> Interval to next inspection 14.89 Years <br /> (RRT-0.10)1(Int+US C.R.) <br /> If a thin ftlm coating is installed after repairs <br /> (expected life of coating must equal or exceed this interval) 20.00 Years <br /> (Internal Corrosion Rate=0) (RRT-0.10)1(0+US C.R.) <br /> APIRPTNE.00T REV 2 26280304&.doe W512006 10:09 AM <br />