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Sensitivity to Trapped Vapor <br /> 14. (X) According to the vendor, this system can he 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 not 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. dT Induced Leak Rate Measured Leak Rate <br /> (•F) (gal/ho (gal/h1 <br /> t +9,99 2.94 gal/hr @ 10 psi Fail <br /> 2 +6.23 2.91 al/hr @- 10 i Fail <br /> 3 -6.07 2.8 al/hr @ 10 s 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/h. <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 />