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V <br /> ` Criterion for Declaring a Leak <br /> 3. This system <br /> ( )uses a preset threshold <br /> (X)measures and reports the output quantity and compares it to a predetermined threshold <br /> to determine whether the pipeline is leaking. <br /> 4. This system <br /> (X) uses a single test <br /> ( )uses a multiple-test sequence consisting of tests (specify number of tests required) <br /> separated by hours (specify the time interval between tests) <br /> to determine whether the pipeline is leaking. <br /> 5. This system declares a leak if the output of the measurement system exceeds a threshold of <br /> 0.136 gal/hr' (specify flow rate in gal/h) in 1 out of 1 tests (specify, for example, <br /> 1 out of 2, 2 out of 3). If more detail is required,please specify in the space provided. <br /> Evaluation Approach <br /> 6. There are five options for collecting the data used in evaluating the performance of this system. <br /> This system was evaluated <br /> (X) at a special test facility (Option 1) <br /> ( ) at one or more instrumented operational storage tank facilities(Option 2) <br /> ( ) at five or more operational storage tank facilities verified to be tight(Option 3) <br /> ( ) at 10 or more operational storage tank facilities(Option 4) <br /> ( )with an experimentally validated computer simulation(Option 5) <br /> 7. A total of 65 tests were conducted on nonleaking line(s) between 30-Nov-97 (date) and <br /> 6-Feb-98 (date). A description of the pipeline configuration used in the evaluation is given in <br /> Attachment 3. <br /> Answer questions 8 and 9 if Option 1, 2, or S was used. <br /> 8. The pipelines used in the evaluation were 3.25/1.5 inches in diameter, 200/215 ft in length <br /> and were constructed of fiberglass/flexible(fiberglass, steel, or other)? <br /> 9. A mechanical line leak detector <br /> (X) was <br /> ( ) was not <br /> present in the pipeline system. <br /> Answer questions 10 and 11 if Option 3 or 4 was used. <br /> 10. The evaluation was conducted on (how many)pipeline systems ranging in diameter from <br /> in. to in., ranging in length from ft to ft, and constructed of <br /> (specify materials). <br /> 1 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 /> 2 At total of 59 tests were conducted on the rigid pipeline. A total of 6 tests were conducted on the flexible <br /> piping to demonstrate the system's performance on flexible piping. <br /> Pipeline Leak Detection System-Results Form Page 2 of 5 <br />