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1__R% PERM 200-17 ZCL® I XERXES* making a lasting difference 1. Pre -Test Notes: 1.1. Do not conduct this TRUCHEK tank -tightness test until after the tank is installed and has backfill placed to at least the top of the tank. 1.2. If the tank contains water or product, do not start the test until at least 24 hours after product has been delivered to the tank in order to equalize the temperature in the tank. Note: The test can also be conducted when the tank is empty. 1.3. If monitoring wells are in place, ascertain water -table levels prior to and after the tank -tightness test to assure there is no extreme water -table fluctuation during the test. Note: Extreme water - table fluctuations during the test period may affect the results of the tank -tightness test. 1.4. The test is considered invalid and should be repeated when testing a 4 -foot-, 6 -foot- or 8 -foot -diameter tank if: - The groundwater level is above the bottom of the tank but below the top of the tank AND if the groundwater level increases by more than 3 inches during the 4 -hour test or more than 7 inches during the 10 -hour test; OR - The groundwater level is above the top of the tank AND the water level rises 2 inches during the 4 -hour test or more than 5 inches during the 10 -hour test. 1.5. The test is considered invalid and should be repeated when testing a 10 -foot -diameter tank if: - The groundwater level is above the bottom of the tank but below the top of the tankAND if the groundwater level increases by more than 4 inches during the 6 -hour test or more than 7 inches during the 10 -hour test; OR - The groundwater level Is above the top of the tank AND the water level rises 3 inches during the 6 -hour test or more than 5 Inches during the 10 -hour test. 2. Test Instructions: 2.1. If it was not previously installed, install a 4 -inch NPT threaded standpipe to the factory -supplied reservoir. Check to see that the threaded connection is tight. Confirm that the standpipe remains vented to the atmosphere at all times. (At the owner's discretion, the standpipe can remain as part of the tank apparatus so the electronic reservoir -monitoring probe can be checked and future tank -tightness tests can be performed. However, the standpipe is not used in continuous monitoring of the tank, is not part of the monitoring system and is not provided by Xerxes.) 2.2. Remove the electronic reservoir -monitoring probe through the standpipe. Check to see that the probe functions correctly and carefully put it in a safe place. 2.3. Prepare a monitoring -fluid solution of 30% calcium -chloride mix. Eight to 10 gallons of monitoring fluid should be all that is necessary to top off the reservoir and to raise the fluid level. Pour the monitoring fluid through the standpipe in 1 -gallon increments. (If calcium -chloride flakes are available, mix at 5.22 pounds of flakes to 1 gallon of water.) Caution: Raising the monitoring -fluid level into the standpipe Is temporary and performed only to determine tank tightness. In normal use, the monitoring fluid will not rise to the level of the standpipe, which serves only as an access to the reservoir. Leaving the monitoring fluid at a raised level may cause excessive pressure and damage the tank. TRUCHEKDATA LOG' 2.4. If the connection is visible, check to see there are no monitoring - fluid leaks at the standpipe/reservoir connection. 2.5. Using a dipstick or ruler marked with 118 -inch increments, raise the monitoring -fluid level into the standpipe approximately 6 to 12 inches. Do not overfill the standpipe. Caution: The tank may be damaged by excessive hydrostatic pressure. To increase the accuracy of the tank -tightness test, use water -finding paste to pinpoint the calibrated -dipstick measurements. 2.6. If performing the 95%-5% test and dispensing product during the test, record the meter reading(s) for the dispenser(s) connected to the tank being tested. 2.7. Check the monitoring -fluid level and record it on line to or line 1 b on the Data Log form on the other side of these instructions. The more accurate the measurement, the more accurate the tank - tightness test will be. 2.8. If performing the 95%-5% test, wait 4 hours (6 hours for 10 -foot -diameter tanks). Then check the monitoring -fluid level again and record it on line 2a. Note: See the maximum allowable dispensing volume for product in the test boxes on Data Log form. 2.9. If performing the 99%-1 % test, wait 10 hours after the initial measurement. Then check the monitoring -fluid level again and record it on line 2b. Note: No dispensing of product is allowed during this extended test. 2.10. Subtract line 2a from line la, or line 2b from 1 b. Enter the figure on line 3. 2.11. Multiply the figure on line 3 by the calibration factor on line 4 and enter the resuit on line 5. 2.12. Divide the line 5 figure by the number of hours in the test (as noted in line 6). 2.13. Enter the result of dividing line 5 by line 6 on line 7. If the figure is 0.05 gallon/hour or less, the tank has passed the test. 2.14. Record reading(s) of dispenser(s) after conducting the tank - tightness test. Compare these to the readings taken prior to the test to verify that you have not exceeded the maximum product - dispensing rate for the specific tank as noted on the TRUCHEK Data Log form. 2.15. If the tank test fails, repeat the test to confirm that you made no errors in the testing procedures. Note: See Points 1.4. and 1.5. in this procedure for explanation for invalid tests. If the test fails again, immediately contact technical support at Xerxes' corporate office for further instructions. 2.16. After the test is completed: - Remove the additional monitoring fluid with a pump and adjust the level of the monitoring fluid In the reservoir to the level stated in Monitoring Section of the current Xerxes Installation Manual and Operating Guidelines for Single- Wall and Double - Wall Fiberglass Underground Storage Tanks; and - Carefully replace the electronic probe system and check the positions of the high -fluid -level and low -fluid -level sensors. 2.17. Maintain the Data Log form as a permanent record and submit it to any jurisdiction that requires it. 7901 Xerxes Avenue South, Minneapolis, MN 55431-1288 1 (952) 887-1890 1 FAX (952) 887-1882 1 www.xerxes.com 0 pei.org