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LI 0 <br />Criterion for Declaring a Leak <br />I This system <br />W uses a preset threshold <br />measures and reports the output quantity and compares it to <br />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 <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 />0.05 (specify flow rate in gal/h) in 1 out of 1 tests (specify, for example, I <br />out of 2, 2 out of 3). Please give additional details, if necessary, in the space provided. <br />After accounting for effects of thermals, if any. <br />6. There are five options for collecting the data used in evaluating the performance of this <br />system. This system was evaluated <br />W 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 />piperi ne <br />7. A total of 53 tests were conducted on nonleaking mnlox) between 7/8/91 (date) <br />and 7/20/91 (date). A description of the pipeline configuration used in the evaluation is <br />given in Attachment 3. <br />Answer questions 8 and 9 if Option 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 System has a 3 gph test mode, whose function <br />(X) was not I replaces that of a mechanical leak detector. <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 />Pipeline Leak Detection System - Results Form <br />Page 2 of 5 <br />