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Ila The induced leak rate and the test results used to estimate the performance of this method are summarized in Attachment 5 . Were any test runs removed from the data set? X no .yes If yes , please specify the reason and include with Attachment 5 . (If more than one test was removed, specify each reason separately . ) Sensitivity to Trapped Vapor 12 . X According to the vendor, this method can be used even if trapped vapor is present in the pipeline during a test . _ According to the vendor, this method should not be used if trapped vapor is present in the pipeline . 13 . The sensitivity of this method to trapped vapor is indicated by the test results summarized in Table 1 . These tests were conducted at 30 psi with 500 mL of vapor trapped in the line at a pressure of 0 psi . The data and test conditions are reported in Attachment 6 . Table 1 . Summary of the Results of Trapped Vapor Tests AT Induced Leak Rate Measured Leak Rate (010 Test No. (gal/hr) (tight/leak) 37 + 10 . 1 3 leak 38 + 10 . 1 0 tight 45 -o . l 0 tight Application of the Method 16 . This release detection method is intended to test pipeline systems that are associated with underground storage tank facilities, that contain petroleum or other chemical products, that are typically constructed of fiberglass, steel, or other and that typically measure 2 in. in diameter and 150 ft or less in length. The performance estimates are valid when : • the method that was evaluated has not been substantially changed by subsequent modifications • the vendor' s instructions for using the method are followed • a mechanical line leak detector _ is present in X has been removed from the pipeline (check both if appropriate) • the waiting time between the last delivery of product to the underground storage tank and the start of data collection for the test is 0 hr • the waiting time between the last dispensing of product through the pipeline system and the start of data collection for the test is 0 hr • the total data collection time for the test is between 7 and 13 minutes • the volume of the product in the pipeline system is less than twice the volume of the product in the pipeline system used in the evaluation, unless a separate written justification for testing larger pipeline systems is presented by the vendor, concurred with by the evaluator, and included with this evaluation as an additional attachment. • give any other limitations specified by the vendor or determined during theevaluation : Pipeline Release Detection System Page 4