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WALTON <br /> ENGINEERIKra, INC. <br /> Overfill Prevention Inspection- OPW 61 and 71 Series Devices <br /> Date: 6/13/2025 <br /> Owner:7-Eleven <br /> Facility: 7-Eleven #2369-32262 <br /> OPW Overfill Model Number: 71 SO-87 Grade (tank 1) and 91 Grade (tank 2) <br /> Part 1 -Proper Height Setting Calculation <br /> Tank 1 Tank 2 Tank 3 Tank 4 <br /> Maximum Tank Volume Per: A Gallons 14781 9684 <br /> Max shut off requirement for flapper is 95% s 95% .95 .95 <br /> Multiply Max tank volume by 95% C Gallons 14042 9200 <br /> Use tank chart or ATG to determine height of D Inches 81.125 80.375 <br /> calculated volume <br /> Measure top of fill riser threads,or face seal E Inches 34.25 33.25 <br /> adapter <br /> Tank diameter(From Tank Chart) F Inches 90.375 89.75 <br /> Upper Tube in Tank(G)F-D=G G Inches 9.25 9.375 <br /> Subtract 2"from upper tube in tank G-2"=K x Inches 7.25 7.375 <br /> Calculated minimum upper tube length(I) I Inches 41.5 40.625 <br /> K+E=I <br /> Actual measured upper tube length(Without J Inches 44.5 44.375 <br /> fill adapter)(J) <br /> Part 2 -Device Certification Criteria Evaluation <br /> Does the overfill prevention device meet the 95% YES YES <br /> requirement? <br /> Is the actual measured upper tube length 6.5 inches or YES YES <br /> more than the fill riser?(J must be 6.5"or more than E) <br /> Does the overfill prevention device function as required? <br /> (Inspect the device for damage,contamination,freedom of YES YES <br /> movement,weakening due to wear and corrosion <br /> Device Overfill Certification PASS /FAIL PASS PASS <br /> Drop Tube Testing PASS/FAIL PASS PASS <br /> Technician certifies that the device is operationally compliant. <br /> Signature of Technician: Date: 6/13/25 <br /> Technician's Name:Sean Davies <br />