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PEIIRP1200_17� sump, where it can be easily observed or detected prevent water from entering the interstitial space by a sensor. of double-walled piping. Without these fittings, the integrity of the sump cannot be tested using This section describes a hydrostatic test method. this method. There are vacuum test methods available for con- tainment sumps. Consult the manufacturer before 5.If interstitial monitoring sensors are present performing a vacuum test. within the containment sumps, temporarily remove them before conducting the test. If the NOTE:Follow the manufacturer's instructions sensor is removed, reposition after testing to when testing the interstitial spaces of double- appropriate position according to the manufac- walled containment sumps. turer's instructions. 6.If the containment sump is found to have cracks, 6.5.2 Purpose. This section describes the prepa- loose parts or separation of any joints or penetra- ration and procedures to test the integrity of con- tion fittings, it is not considered to be liquid- tainment sumps to ensure that they do not leak. tight.This visually indicates a test failure. 6.5.3 Description of Test. The containment - sump is filled to the proper level with water. The CAUTION: Water can damage electrical water level is measured at the beginning and end of connections. Ensure that there are no the test. components that can be damaged by the addition of water to the sump. If such 6.5.4 Test Equipment. Test equipment shall components are present,take appropriate include: precautions when performing the test or • water; use an alternative test method. • measuring stick that is accurate to within 1/16 (0.063)inch and of sufficient length; • stopwatch or other time-measurement device capable of measuring a 1-second increment. 6.5.5 Preparation. waterElectdcat Level Junction 1.Care should be taken when conducting the test 1 Box in the rain or during freezing weather condi- Electrical tions. Conduit 2.Remove and properly dispose of any liquid and Product debris (leaves, sediment and trash) in the con- Piping tainment sump. 3.Inspect the containment sump for damage. - - - Examine all penetration fittings. conduits. iunc- FIGURE 6-5. The test fluid level in the under dispenser tion boxes,caps and risers (if present),and side- containment(UDC)must be at least 4 inches above the wall seams for defects, damage or improperly highest sump penetration or sidewall seam. installed components. If there are loose com- ponents (e.g., loose penetration fitting clamps or missing interstitial space caps), correct these 6.5.6 Test Procedure. items before performing the integrity test. If 1.Begin the test by adding water to the sump to a there are items that must be repaired or replaced minimum of 4 inches above the highest sump a (e.g., deteriorated penetration fitting boots), penetration or sump sidewall seam,whichever is notify the owner/operator and obtain approval higher. To compensate for sump deflection, the prior to proceeding with repairs. water must be allowed to settle a minimum of 4.Test boots or secondary containment termina- 15 minutes before taking the initial test measure- tion fittings must be present on the piping pen- ment. If the highest sump penetration or sump etrating the sump. During testing, these fittings sidewall seam is less than 4 inches from the top '.� pei.org