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Northwest Pipe Spill Prevention, Control, and Countermeasure (SPCC) Plan 63 <br /> Company Tracy Plant <br /> 1N U e t Pipe <br /> Company <br /> Title: SPCC Storage Container Inspection & Integrity Testing Guidelines <br /> VI. Tank CateporyDec ision Tree <br /> (The table below is from the Steel Tank Institute Standards for Inspections of ASTs,January 2018 <br /> version,SP001) <br /> Ik��s A:�I <br /> .ave �pil Cd#egory 3: <br /> N Q Sp ill[gntrol <br /> i Spill Cartrol Methods: <br /> • Remote impounding <br /> • Secorldarycontainmeint dike/berm <br /> • Secondarycontairrment system <br /> open trap steel diked DST <br /> Closed top steeldrked ASTwrth owerflll <br /> prevention <br /> doubly-wa1I AST with overfill prevention <br /> (&AST wfth overfill preventlon <br /> A:.- Catapry 2- <br /> h Spill Control <br /> NoCRDPA <br /> Continuous Release Detection Methods(CR DM): <br /> + Release preventlonbarrler IRPB) <br /> + Double-wall ASTordouble-bottom AST <br /> + Elevated AST,withorwithoutrelea se <br /> prevention barrier <br /> + Steel diked AST,open or dosed top <br /> + <br /> CE-AST wlth integral secondary <br /> contalnmentand Interstitlal monitor <br /> opening <br /> G#ogoty 1: <br /> Spill Contra) <br /> CRDM <br /> Page 3 of 4 <br /> Last revised 03,+3df2020 <br />