1. MFE ENTERPRISES, INC. Magnetic Flux Leakage Above Ground Storage Tank Floors

2. 1) Electronics Module 2) Battery Box 3) Magnetic Bridge 4) Sensor Main Components: MFE 2412 Mark 2 Floor Scanner MFE ENTERPRISES, INC.

3. Alarm 30 12.54 Display Battery Gain Low High ON OFF ON OFF Reset MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 MFE ENTERPRISES, INC. MFE 2412 Mark 2 Electronics Module

4. 30 12.54 Display Battery Gain LowHigh ON OFF Reset MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 ON 1 2 3 4 5 6 7 8 9 10 11 12 Bottomside Slot (Alarm Off) Alarm Reset OFF ON

5. MFE ENTERPRISES, INC. MFE 2412 Mark 2 Magnetic Bridge

6. Magnetic Field Through Air N S Magnetic Field Through Steel Floor Plate Sensor MFE ENTERPRISES, INC.

7. Floor Plate N S Sensor Magnetic Field Through Steel MFE ENTERPRISES, INC.

8. N S Floor Plate Sensor Corrosion Pit MFE ENTERPRISES, INC.

9. Floor Plate Corrosion Pit N S Sensor MFE ENTERPRISES, INC.

10. Floor Plate Corrosion Pit N S Sensor 30 12.54 Display Battery Gain LowHigh ON OFF Reset MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 ON Alarm Reset OFF ON MFE ENTERPRISES, INC.

11. Influence of Magnet Lift Off on Signal Amplitude Detection Threshold Detection Threshold A B MFE ENTERPRISES, INC.

12. Floor Plate Corrosion Pit Sensor MFE ENTERPRISES, INC. MFE 2412 Mark 2 Effect of Magnet Lift Off

13. Influence of Sensor Lift Off on Signal Amplitude Detection Threshold Detection Threshold A B MFE ENTERPRISES, INC.

14. Floor Plate Corrosion Pit Sensor MFE ENTERPRISES, INC. MFE 2412 Mark 2 Effect of Sensor Lift Off

15. Influence and adjustment for coatings Detection Threshold Detection Threshold Detection Threshold A B C MFE ENTERPRISES, INC.

16. Floor Plate Corrosion Pit Sensor MFE ENTERPRISES, INC.

17. Floor Plate Corrosion Pit Sensor MFE ENTERPRISES, INC.

18. Sensor Floor Plate Corrosion Pit N S Sensor 30 12.54 Display Battery Gain LowHigh ON OFF MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 Alarm Reset ON OFF ON 30 12.54 Display Battery Gain LowHigh ON OFF MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 Alarm Reset ON OFF ON Floor Coating MFE ENTERPRISES, INC.

19. Effects of plate curvature on signal amplitude Detection Threshold Detection Threshold Detection Threshold A B C MFE ENTERPRISES, INC.

20. Side to side effect on signal amplitude caused by plate curvature Detection Threshold Detection Threshold Detection Threshold A B C MFE ENTERPRISES, INC.

21. Scanner Wheelbase effect with curved surface Detection Threshold Detection Threshold Detection Threshold A B C MFE ENTERPRISES, INC.

22. Volumetric influence on signal amplitude A B Detection Threshold Detection Threshold C Detection Threshold MFE ENTERPRISES, INC.

23. Topside / Bottomside influence on signal Amplitude A B Detection Threshold Detection Threshold MFE ENTERPRISES, INC.

24. 30 12.54 Display Battery Gain LowHigh ON OFF Reset MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 ON 1 2 3 4 5 6 7 8 9 10 11 12 Bottomside Slot (Alarm Off) Alarm Reset OFF ON

25. Alarm 30 12.54 Display Battery Gain LowHigh ON OFF Reset MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 OFF ON 1 2 3 4 5 6 7 8 9 10 11 12 Bottomside Slot (Alarm On)

26. Alarm 30 12.54 Display Battery Gain LowHigh ON OFF Reset MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 OFF ON 1 2 3 4 5 6 7 8 9 0 1 2 Bottomside Pit (Alarm Off)

27. 1 2 3 4 5 6 7 8 9 0 1 2 Bottomside Defect w/ Topside Pitting (Alarm Off) 30 12.54 Display Battery Gain LowHigh ON OFF Reset MFE 2412 Mk2 MFE ENTERPRISES INC 1 2 3 4 5 6 7 8 9 0 1 2 ON Alarm Reset OFF ON