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I t 2 <br />IT,in �� W, ' <br />A1phcafion Guide <br />1. The TRU-CHEK® tank tightness test <br />procedure must be conducted after the tank <br />is installed and with backfill at least to the <br />tank top. <br />2. If it was not previously installed, install <br />a 4" NPT threaded standpipe to the factory <br />supplied reservoir. Be sure the threaded <br />connection is secure. Often the standpipe, <br />at owner direction, remains part of the tank <br />apparatus to provide the opportunity to <br />check the electronic reservoir monitoring <br />probe and to perform future tank tightness <br />tests. <br />3. If currently installed and in service, <br />check the functionality of the electronic <br />monitoring reservoir probe. <br />• Raise the sensor float to verify the <br />high level alarm. <br />• Concurrently verify the low level alarm. <br />4. Remove the electronic reservoir probe <br />up through the standpipe and carefully <br />place it in a safe place away from foot traffic. <br />5. Prepare a brine solution of 30% table <br />salt (sodium chloride) or an equivalent mix. <br />Five to eight gallons of mixed brine should <br />be all that is needed. Introduce brine <br />CORPORATION <br />through the standpipe in one gallon <br />increments. <br />If calcium chloride flakes are available, <br />mix at 5.22 lbs. of flakes to 1 gallon of water. <br />6. If the connection is visible, check to <br />be sure there are no brine leaks at the <br />standpipe/reservoir connection. <br />7. Utilizing a dipstick calibrated to V <br />increments, raise the brine level into the <br />standpipe approximately 6" to 12" Do not <br />fill the standpipe. There is a possibility of <br />damaging the tank due to excessive hydro- <br />static pressure. <br />8. If monitoring wells are in place, <br />ascertain water table levels prior to and after <br />the tank tightness test to assure there is <br />not extreme water table fluctuation during <br />the test. <br />The test is considered invalid and <br />should be repeated if the ground water level <br />is above the bottom of the tank but below <br />the tank top and the water level rises more <br />than 3" during the four hour test or 7" during <br />the ten hour test. These numbers should be <br />2" for a four hour test and 5" for a ten hour <br />test if the ground water level is above the top <br />of the tank. <br />(Continued) <br />