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� • s <br />0 <br />D <br />Criterion for Declaring a Leak <br />3. This system <br />(X) uses a preset threshold <br />( ) 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 amultiple-test sequence consisting of tests (specify number of tests <br />required) 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 />1.88 galffir (specify flow rate in gal/h) in 1 out of 1 tests (specify, for'example, 1 out <br />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 <br />system. This system was evaluated <br />( X) at a special test facility (Option 0 <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 />pipelin <br />7. A total of - 53 tests were conducted on nonleaking tM between 7/8/91 (date) <br />and 7/20/91 (date). A description of the pipeline configuration used in the evaluation is <br />summarized in Attachment 3. <br />Answer questions 8 and 9 if Oprion 1, 2, or 5 was used. <br />8. The pipeline used in the evaluation was 2 in. in diameter, 219 ft long and <br />constructed of fiberglass (fiberglass, steel, or other). <br />9. A mechanical line leak detector <br />( ) was <br />(X) was not <br />present in the pipeline system. <br />Answer questions 10 and 11 if Option 3 or 4 was used. NA <br />10. The evaluation was conducted on (how many) pipeline systems ranging in <br />diameter from in. to in., ranging in length from ft to <br />ft, and constructed of (specify materials). <br />IPipeline Leak Detection System - Results Form <br />I I <br />Page 2 of 5 <br />