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Sensitivity ITrapped Vapor <br />14. (X) According to the vendor, this system can be used even if trapped vapor is present in the <br />pipeline during a test. <br />( ) According to the vendor, this system should not be used if trapped vapor is present in <br />the pipeline. <br />15. The sensitivity of this system to trapped vapor is indicated by the test results summarized in <br />Table 2. These tests were conducted at operating psi with 110 ml of vapor trapped <br />in the line at a pressure of 0 psi. The data and test conditions are reported in Attachment 6. <br />Table 2. Summary of the Results of Trapped Vapor Tests <br />Test No. <br />AT <br />M <br />Induced Leak Rate <br />(gal/h @ 20 ps) <br />Measured Leak Rate <br />(leakltight) <br />V-1 <br />+2.96 <br />0 <br />t <br />V-2 <br />+3.94 <br />0.201 <br />leak <br />V-3 <br />+4.69 <br />0301 <br />leak <br />Performance Characteristics of t <br />:ei rr r re Instrumentation <br />16. State below the performance characteristics of the primary measurement system used to <br />collect the data. (Please specify the units, for example, gallons, inches.) <br />Quantity Measured: pressure (psi <br />Resolution: 0.1 psi <br />Precision: 0.1 psi <br />Accuracy: +/- 2% <br />Minimum Detectable Quantity: 0.1 psi <br />Response Time: 1 second <br />Threshold is exceeded when the flow rate due to a leak exceeds 0.2 gal/h. <br />Application of !,. System <br />17. This leak detection system is intended to test pipeline systems that are associated with <br />underground storage tank facilities, that contain petroleum or other chemical products, that <br />are typically constructed of fiberglass or steel, and that typically measure 2 or 3 in. in <br />diameter and 150 ft or less in length. The performance estimates are valid when: <br />• the system that was evaluated has not been substantially changed by subsequent <br />modifications <br />• the manufacturer's instructions for using the system are followed <br />• the mechanical line leak detector <br />( ) ,is present in <br />(X) has been removed from <br />the pipeline (check both if appropriate) <br />the waiting time between the last delivery r ' product t• the underground <br />and the start of data collection for <br />Pipeline Leak Detection System • Results Form Page 4 of 5 <br />