COMPLIANCE INFO_2020 - Laserfiche WebLink

Home Browse Search

Recommended Practices for the Testing and Verification of Spill , Overfill , Leak Detection and Secondary Containment Equipment at UST Facilities 6. 5.1 General . Containment sumps are liquid- tight structures designed to temporarily contain leaks or spills . In addition, containment sumps often serve as the leak detection monitoring loca- tion for double-walled piping systems . Leakage from the primary containment typically flows by gravity inside the secondary containment to the sump, where it can be easily observed or detected by a sensor. 0 1 This section describes a hydrostatic test method . There are vacuum test methods available for con- tainment sumps. Consult the manufacturer before performing a vacuum test . NOTE: Follow the manufacturer 's instructions when testing the interstitial spaces of double- walled containment sumps . 6. 5 .2 Purpose. This section describes the prep- aration and procedures to test the integrity of con- tainment sumps to ensure that they do not leak . 6 . 5 .3 Description of Test. The containment sump is filled to the proper level with water. The water level is measured at the beginning and end of the test . 6. 5.4 Test Equipment. Test equipment shall include : • water; • 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 Containment Sump Integrity Testing. 6. 5 . 5 Preparation . 1. Care should be taken when conducting the test CAUTION . Gaining access to the contain - in the rain or during freezing weather con& ment sump requires removing the lid , tions . cover or dispenser panel that is in place to protect the equipment in the sump . These 2. Remove and properly dispose of any liquid and debris (leaves, sediment and trash ) in the con. components can be heavy. They may require special handling and more than tainment sump. one person to remove them . Use caution 3. Inspect the containment sump for damage . when moving and replacing them when Examine all penetration fittings, conduits , junc- testing is complete . During the test , put tion boxes , caps and risers (if present), and side- the covers and panels in a safe location wall seams for defects, damage or improperly where they are secure and isolated from installed components . If there are loose com- vehiele and customer traffic . ponents (e. g. , loose penetration fitting clamps or missing interstitial space caps) , correct these items before performing the integrity test . If pei , org