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Y <br />.2 Gallon Per Hour Leak Test Result Messages (Cont.) <br />There are events that can occur which may adversely affect the result of an individual leak test. Even though the <br />system was designed to minimize the effects of these events and the events infrequently occur, occasionally an - <br />invalid leak test result will be obtained. <br />Some of the events that may cause an inaccurate leak test result include: — <br />• A large change in the product vaporization during a leak test. <br />• <br />Tank deformation caused by a delivery shortly before a leak test begins. <br />• A delivery occurs shortly before a leak test begins that has an extreme temperature differential <br />between the delivered product and the product in the tank. <br />• Severe or sudden changes in the weather caused by fronts, storms, wind, lightning, etc. <br />• Excessive power line disturbances. <br />Consequently, the result of a single leak test should not always be accepted as conclusive. If the leak test result is <br />suspect, the leak test should be repeated again until consistent results are obtained. <br />To Start And Stop ATG Leak Tests By Remote Communications. <br />For information on the remote communications cababilities, see Section 12-0, Remote Communications on <br />page 30. <br />