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Criterion for Declaring a Leak 3. This system ()0 uses a preset threshold' ( ) measures and reports the output quantity and compares it to a predetermined threshold to determine whether the pipeline is leaking. 4. This system (X) uses a single test ( ) uses amultiple-test sequence consisting of tests(specify number of tests required) separated by hours (specify the time interval between tests) to determine whether the pipeline is leaking. 5. This system declares a leak if the output of the measurement system exceeds a threshold of 1.88 g2]ZhLr (specify flow rate in gal/h) in 1 out of 1 tests (specify, for'example, 1 out of 2. 2 out of 3). If more detail is required, please specify in the space provided. Evaluation Approach 6. There are five options for collecting the data used in evaluating the performance of this system. This system was evaluated (X) at a special test facility (Option 1) ( ) at one or more instrumented operational storage tank facilities (Option 2) ( ) at five or more operational storage tants facilities verified to be tight (Option 3) ( ) at 10 or more operational storage tank facilities (Option 4) ( ) with an experimentally validated computer simulation (,p�tion 5) pipelinb 7. A total of 53 tests were conducted on nonleaking X) between 7/$/91. (date) and 7/20/91 (date). A description of the pipeline configuration used in the evaluation is summarized in Attachment 3. Answer questions 8 and 9 if Option 1,2, or S was used. 8. The pipeline used in the evaluation was 2 in, in diameter, 219 ft long and constructed of fiberglass (fiberglass,steel, or other). 9. A mechanical line leak detector ( ) was (X) was not present in the pipeline system. Answer questions 10 and I1 if Option 3 or 4 was used. NA 10. The evaluation was conducted on (how many)pipeline systems ranging in diameter from in. to in., ranging in length from ft to ft, and constructed of (specify materials). Pipeline Leak Detection System-Results Form Page 2 of 5