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How does the method identify the presence of vapor pockets? <br /> ( ) vapor pockets are not a problem for this system <br /> (X) large fluctuations in level <br /> (X) other (describe briefly) If proper introduction of brine is followed <br /> trapped vapor should not be a problem <br /> ( ) not identified <br /> ( ) not applicable <br /> How does the method correct for the presence of vapor pockets? <br /> ( ) purge vapor from the interstice <br /> ( ) presence of vapor is not a problem <br /> (X) other (describe briefly) Use proper methods for filling interstice. <br /> ( ) not applicable <br /> If not, how often are the sensors calibrated? <br /> ( ) factory calibration before installation <br /> ( ) yearly or less frequently <br /> (X) never <br /> > Interpreting test results <br /> What effect is used to declare the pipeline to be leaking? (List all modes used by the <br /> method.) <br /> If the brine level in the reservoir rises above or falls below the threshold <br /> of the sensors an alarm is triggered indicating the possible presence of <br /> a leak. <br /> If a change in volume is used to detect leaks, what threshold value for product volume <br /> change (gallon per hour) is used to declare that a pipeline is leaking? <br /> (X) cumulative loss or gain of liquid in the reservoir <br /> ( ) other <br /> Exceptions <br /> Are there any conditions under which this system should not be installed? <br /> (X) reservoir cannot be located at least 12 inches above ground water <br /> Liquid Filled Interstitial Monitoring—Results Forms Page 4 of 5 <br />