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Lj <br />E <br />E <br />Sensitivity to Trapped 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. (if not excessive.) <br />( ) According to the vendor, this system should nor be used if trapped vapor is present in the <br />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 28_ .. psi with 100 ml of vapor trapped in the <br />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. AT Induced Leak Rate Measured Leak Rate <br />(•F) (galth) I gal/h I <br />1 +9.99 2.94 gal/hr @ 10 p Fail <br />2 +6.23 2.91 2al/hr @10 p Fail <br />-6.07 2.8 gal/hr @ 10 psi Fail <br />Performance Characteristics of the 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) Volume (ml) Time (sec) <br />Resolution: 0.1 0.5 0.01 <br />Precision: 0.1 0.5 0.05 <br />Accuracy: 0.3 1.0 0.01 <br />Minimum Detectable Quantity: 0.1 1.0 0.01 <br />Response Time: --- --- --- <br />Threshold is exceeded when the flow rate due to a leak exceeds 1.88 gal/b. <br />Application of the 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 in. in diameter <br />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 />A mechanical line leak detector is no longer needed because the CEI system <br />performs a 3.0 gph test every time dispensing stops. <br />Pipeline Leak Detection System - Results Form Page 4 of 5 <br />U <br />