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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. <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 pump operationalrep ssure psi with 110 ml of <br /> vapor trapped in the line at a pressure of 0 psi. The data and test conditions are reported in <br /> Attachment 6. <br /> Table 2.SummM of the Results of Tra ed Va or Tests <br /> Test No. Temperature Difference Induced Leak Rate Leak Detected <br /> de F aUh (yes_LnoL. <br /> V- 1 10.58 0 No <br /> V-2 20.11 0.1 Yes <br /> V-3 7.48 1 0.1 Yes <br /> Performance Characteristics of the Instrumentation <br /> 16. State below the performance characteristics of the primary measurement system used to collect <br /> the data. (Please specify the units, for example, gallons, inches.) <br /> Quantity Measured: Volume and time <br /> Resolution 0.00 1 gal/h <br /> Precision: ±0.002 gal/hr <br /> Accuracy: 0.01 gal/h <br /> Minimum Detectable Quantity: 0.01 gal/h <br /> Response Time: Variable depending on line and product conditions <br /> Threshold is exceeded when the flow rate due to a leak exceeds 0.136 ' 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 are <br /> typically constructed of rigid or flexible pipeline materials. Volumes of the pipelines are <br /> typically 172 gallons or less for rigid pipelines or 39.5 gallons or less for flexible piping. The <br /> 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 /> 3 Monthly Monitoring for 0.2 gal/h leaks was not tested by KWA,Inc. Tests with leak rates of 0.1 gal/h were <br /> simulated and were detected by the system when the threshold was set at 0.068 gal/h. The system correctly identified <br /> 100%of the 0.1 gal/h leak simulations and it is therefore assumed that the system will correctly identify 0.2 gal/h leaks <br /> using a threshold of 0.136 gal/h_ <br /> Pipeline Leak Detection System-Results Form Page 4 of 5 <br />