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E <br />Sensitivity to Trapped Vapor <br />E <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 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 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 * (approximately 1.5 times operating pressure) <br />Test No. AT <br />CF) <br />Induced Leak Rate <br />(gal/hl <br />Measured Leak Rate <br />(gal/h) <br />1 +8.56 <br />OJO al hr <br />PASS <br />2- +6.23 <br />0.097 gph @ 40 psi <br />FAIL <br />-10.18 <br />0.099 gph @ 40 psi l <br />FAIL <br />Performance Characteristics of the Instrumentation <br />16. State below the performance characteristics of the primary measurement system(s) 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: <br />0.3 1.0 0.01 <br />Mirlinaurn Detectable Quantity: . 0 - 1 1.0 0.01 <br />Response Time: -- <br />Threshold is exceeded when the flow rate due to a leak exceeds 0.05 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 otheri chemical products, that <br />are typically constructed of fiberglass or steel, and that typically measure 2 in. in diameter <br />and 200 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 />• a mechanical line leak detector System has a 3 gph test mode, whose <br />( )is present in function replaces that of a mechanical <br />(X) has been removed from I line leak detector. <br />the pipeline (check both if appropriate) <br />Pipeline Leak Detection System - Results Form Page 4 of 5 <br />