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FD- on) PEI/RP1200-17 JUL 7 2020— ---- --_ APPENDIX A-2 contititued ZCV I XERXES® TRUCHEK a making a lasting difference DATA LOG TANK-TIGHTNESS TESTING PROCEDURE 1.Pre-Test Notes: 2.4. If the connection is visible,check to see there are no monitoring- 1.1. Do not conduct this TRUCHEK tank-tightness test until after the fluid leaks at the standpipe/reservoir connection. tank is installed and has backfill placed to at least the top of the 2.5. Using a dipstick or ruler marked with 1/8-inch increments,raise tank, the monitoring-fluid level into the standpipe approximately 6 to 1.2. If the tank contains water or product,do not start the test until 12 inches.Do not overfill the standpipe. at least 24 hours after product has been delivered to the tank in Caution:The tank maybe damaged by excessive order to equalize the temperature in the tank.Note:The test hydrostatic pressure.To increase the accuracy of the can also be conducted when the tank is empty. tank-tightness test,use water-finding paste to pinpoint 1.3. If monitoring wells are in place,ascertain water-table levels prior the calibrated-dipstick measurements. to and after the tank-tightness test to assure there is no extreme 2.6. If performing the 95%-5%test and dispensing product during water-table fluctuation during the test.Note:Extreme water- the test,record the meter reading(s)for the dispenser(s) table fluctuations during the test period may affect the connected to the tank being tested. results of the tank-tightness test. 2.7. Check the monhoring-fluid level and record it on line to or line 1.4. The test is considered invalid and should be repeated when t b on the Data Log form on the other side of these instructions. testing a 4-foot-,6-foot-or 8-foot-diameter tank If: The more accurate the measurement,the more accurate the tank- s The groundwater level is above the bottom of the tank but tightness test will be. below the top of the tank AND if the groundwater level increases 2.8. If performing the 95%-5%test,wait 4 hours(6 hours for by more than 3 inches during the 4-hour test or more than 7 10-foot-diameter tanks).Then check the monitoring-fluid level inches during the 10-hour test;OR again and record it on line 2a.Note:See the maximum The groundwater level is above the top of the tank AND the allowable dispensing volume for product in the test water level rises 2 inches during the 4-hour test or more than 5 boxes on Data Log form. inches during the t0-hour test. 2.9. If performing the 99%-1%test,wait 10 hours after the initial 1.5. The test is considered invalid and should be repeated when measurement.Then check the monitoring-fluid level again and testing a 10-foot-diameter tank ff: record it on line 2b.Note:No dispensing of product is -The groundwater level is above the bottom of the tank but allowed during this extended test below the top of the tank AND if the groundwater level increases 2.10. Subtract line 2a from line 1 a,or line 2b from 1 b.Enter the by more than 4 inches during the 6-hour test or more than 7 figure on line 3. inches during the 10-hour test;OR 2.11. Multiply the figure on line 3 by the calibration factor on line 4 -The groundwater level is above the top of the tank AND the and enter the resuit on line 5. water level rises 3 inches during the 6-hour test or more than 5 2.12. Divide the line 5 figure by the number of hours in the test(as Inches during the 1 D-hour test, noted in line 6). 2.Test Instructions: 2.13. Enter the result of dividing line 5 by line 6 on line 7.If the figure 2.1. 9 it was not previously installed,install a 4-inch NPT threaded is 0.05 gallonlhour or less,the tank has passed the test. standpipe to the factory-supplied reservoir.Check to see that the 2.14. Record reading(s)of dispen5er(s)after conducting the tank- threaded connection is tight.Confirm that the standpipe remains tightness test.Compare these to the readings taken prior to the vented to the atmosphere at all times.(At the owner's discretion, test to verify that you have not exceeded the maximum product- the standpipe can remain as part of the tank apparatus so the dispensing rate for the specific tank as noted on the TRUCHEK electronic reservoir-monhoring probe can be checked and future Data Log form. tank-tightness tests can be performed,However,the standpipe is 2.15. If the tank test fails,repeat the test to confirm that you made not used in continuous monitoring of the tank,is not part of the no errors in the testing procedures.Note:See Points 1.4. monitoring system and is not provided by Xerxes.) and 1.5.in this procedure for explanation for invalid 2.2. Remove the electronic reservoir-monitoring probe through the tests.If the test fails again,immediately contact standpipe.Check to see that the probe functions correctly and technical support at Xerxes'corporate office for further carefully put it in a safe place. instructions. 23. Prepare a monitoring-fluid solution of 30%calcium-chloride 2.16. After the test is completed: mix.Eight to 10 gallons of monitoring fluid should be all that -Remove the additional monitoring fluid with a pump and adjust is necessary to top off the reservoir and to raise the fluid level. the level of the monitoring fluid in the reservoir to the level Pour the monitoring fluid through the standpipe in 1-gallon stated in Monitoring Section of the current Xerxes Installation increments.(If calcium-chloride flakes are available,mix at 5.22 Manual and Operating Guidelines for Single-Wall and Double- pounds of flakes to 1 gallon of water.) Wall Fiberglass Underground Storage Tanks;and Caution:Raising the monitoring-fluid level into •Carefully replace the electronic probe system and check the the standpipe is temporary and performed only to positions of the high-fluid-level and low-fluid-level sensors. determine tank tightness.in normal use,the monitoring 2.17. Maintain the Data Log form as a permanent record and submit it fluid will not rise to the level of the standpipe,which to any jurisdiction that requires it. serves only as an access to the reservoir.Leaving the monitoring fluid at a raised level may cause excessive pressure and damage the tank. 7901 Xerxes Avenue South,Minneapolis,MN 55431-1288 (952)887-1890 I FAX(952)887-1882 1 www.xerxes.com pei.org