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Grounding and Bonding do Observations Comments/Recommendations <br /> Are the Tanks Grounded And/Or Bonded Yes <br /> Properly? <br /> Other <br /> ObservationsStairways-Handrails-Platforms-Ladders <br /> Stairways-Handrails-Platforms-Ladders Good <br /> Other <br /> 5. <br /> External Shell <br /> / External Coatings O. <br /> servations Comments/Recommendations <br /> Tank External Coating Paint <br /> External Coating Condition Good ILight paint failure around top of tank.** <br /> Other- Shell <br /> Observations <br /> Condition Of Welds Good <br /> Corrosion Yes <br /> Evidence of Distortion No <br /> Mechanical Damage No <br /> Evidence of Leaks No <br /> Repads or Changes to Original Design? No <br /> Other <br /> Observations <br /> Insulation Missing? N/A <br /> Evidence of Moisture? N/A <br /> Evidence of Mold? N/A <br /> Damage to Insulation? N/A <br /> Corrosion Under Insulation? N/A <br /> Other <br /> Tank Roof Observations <br /> Standing Water low areas)? <br /> Coating Failure? <br /> Other <br /> 6.0 Ultrasonic Thickness Testing <br /> Comments <br /> Ultrasonic Thickness Testing UT measurements were taken on single wall tanks as required by STI SP001 formal <br /> external inspection protocol. See figure 1.1 for a summary of results <br /> Instrument Manufacturer Olympus <br /> Model No. 38DL Plus <br /> Calibration Due Date Calibrated for use <br /> Presentation -scan <br /> Transducer Manufacturer Panametrics <br /> Model No. D7906-SM <br /> Previous UTT Inspection Records Available? <br /> Are UL 142 Steel Thickness Standards Being UL 142 manufacturing specifications will be used for comparison purposes. 20K vertical <br /> Used For Comparison Purposes? tanks built to UL 142 standards will have a minimum steel thickness of.167'on the shell. <br /> UTT Comments The mean or average reading taken was .303"on the shell.The top of the tank was <br /> inaccessible. <br /> Other <br /> 6 <br />