API 322 : 1993

EXECUTIVE SUMMARY
Section 1: INTRODUCTION
Section 2: BACKGROUND
Section 3: SUMMARY OF RESULTS
Section 4: CONCLUSIONS AND RECOMMENDATIONS
Section 5: IMPORTANT FEATURES OF A PASSIVE-ACOUSTIC METHOD
           WITH HIGH PERFORMANCE
Section 6: REPORT ORGANIZATION
REFERENCES
Appendix A: The Acoustic Signal Produced by a Leak in the
Floor of an Aboveground Storage Tank
Appendix B: A Passive-Acoustic Method of Detecting Leaks in
the Floor of an Aboveground Storage Tank: Field Test Results

Gives details of a set of controlled experiments conducted on a 40-ft-diameter refinery tank to determine the nature of acoustic leak signals and ambient noise under a range of test conditions. The features of a leak detection test needed for high performance are explored. The report concludes that accurate and reliable leak detection of aboveground storage tanks can be achieved through the use of acoustic methods. Companion document Publ 323.