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pei.org 19 Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities of the sump, add water to within 1 inch of the top of the sump. 2.Place the measuring stick vertically at the lowest point in the sump and extending above the water level in the sump to allow for an accurate mea- surement to be taken. The location of the mea- suring stick must remain the same for each water level measurement. Document the initial water level measurement as measured from the bottom of the sump. Alternative measurement methods may be used provided that the measurement to 1/16 (0.063) inch can be made. 3.Take all precautions to prevent the water level from being disturbed during the duration of the test. 4.After 1 hour, document the ending water level measurement. 5.Upon completion of the test: • remove all water and properly dispose of it according to Section 6.7; • reinstall any interstitial monitoring sensors in their proper positions; • return the test boots or secondary containment fittings to their pre-test operating configurations; • inspect and reinstall all containment sump lids, gaskets and covers. 6.5.7 Pass/Fail Criteria. If the water level changes less than 1/8 (0.125) inch, the containment sump passes the integrity test. If the water level changes 1/8 (0.125) inch or great- er, the containment sump fails the integrity test. 6.6 Accelerated Precision Hydrostatic Test for Spill Buckets and Containment Sumps. Electronic preci- sion test equipment can be utilized to test spill buckets and containment sumps. It incorporates more sensitive equipment that permits a test to be conducted in a shorter period of time. The procedures use the same test fluid and tests the same volume as other methods outlined in this chapter. The manufacturer of the measurement equipment should specify the precision and duration of the test and the pass/fail criteria. However, pass/fail criteria should not be less stringent than those prescribed for the 1-hour test in Section 6.5.7. The data sheet for Sections 6.2 or 6.5 may be used for this test. Refer to Appendix D. 6.7 Proper Handling of Test Liquids. Test liquids must be handled properly. Check with the AHJ regarding requirements. FIGURE 6-7. The test fluid level in the tank sump must be at least 4 inches above the highest sump penetra- tion or sidewall seam. FIGURE 6-8. Mea- suring sticks used to measure the water level should be securely mount- ed to ensure that they do not move during the test. Water Level Electrical Conduit Product Piping FIGURE 6-6. To prevent leakage, check all penetration fittings before adding water to ensure they make a tight seal.