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11. When test has been completed, remove all water and retain as test liquid or <br /> dispose of in labeled 55 gallon DOT drums. <br /> 12. Depressurize secondary product lines, pull back test boots or remove valve cores <br /> at sumps. Reinstall leak monitor sensor at lowest point and verify operation. <br /> Tank annular spaces: <br /> 1. Identify and document tank manufacture. <br /> 2. Verify annular is dry. (hydrostatically monitored tanks are exempt.) <br /> 3. Remove annular sensor. (If required ) <br /> 4. Install test plug and cap vent pipe if required. <br /> 5. Apply vacuum in accordance with manufactures specifications. <br /> 6. When appropriate vacuum level has been reached, isolate and close off valve. <br /> Turn off pump and allow tank to stabilize (up to 1 hour), holding manufactures <br /> minimum vacuum level at all times. Once tank has stabilized. <br /> 7. Document initial vacuum reading and start of test time. <br /> 8. Monitor vacuum readings for duration of test and record. Run test a minimum of <br /> 60 minutes for tanks <20k and 120 minutes for tanks> 20k. <br /> 9. Document ending vacuum reading and test time. Tank must record a"0.00" <br /> differential loss to pass. Any loss of vacuum is a failed test. <br /> 10. Notify customer immediately of failed test. No repairs can be made without <br /> authorization. <br /> 11. Release vacuum, remove test equipment and reinstall leak monitor sensor to <br /> lowest point of annular. Verify operation. <br /> Any waste water generated on site and not brought in and hauled out as test water will be <br /> stored in appropriately labeled 55 gallon DOT drums for pick up and disposal by a <br /> licensed hazardous materials handler. <br />