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Recommended Practices for the Testing and Verification of Spill,Overfill,Leak Detection and Secondary Containment Equipment at UST Facilities • inspect and reinstall all containment sump If the water level changes 1/8(0.125)inch or great- lids,gaskets and covers. er, the containment sump fails the, integrity test. as 6.5.7 Pass/Fall Criteria. If the water level 6.6 Accelerated Precision Hydrostatic Test for Spill changes less than 1/8(0.125)inch,the containment Buckets and Containment Sumps. Electronic preci- 9 sump passes the integrity t. sion test equipment can be utilized to test spill buckets 6 and containment sumps. It incorporates more sensitive :J equipment that permits a test to be conducted in a shorter ?. period of tin-t.The procedures use the same test fluid and m tests the same volume as other methods outlined in this Al 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 (D test in Section 6.5.7. a, The data sheet for Sections 6.2 or 6.5 may be used for this 8 test. Refer to Appendix D. Milli 6.7 Proper Disposal of Test Liquids. Test liquids 2 Must be disposed of properly. Check with the AHJ regarding requirements for proper disposal. FIGURE 6-7. The test fluid level in the tank sump must 0 be at least 4 inches above the highest sump penetra- tion or sidewall seam. 7. UST OVERFILL EQUIPMENT VERIFICATION, INSPECTION MD TES71NG 0 to Although W _-b the effectiveness of prevention devices can be tested by attempting to overfill a UST with product and determining how well the device functions. 9. this approach is not recommended. Any malfunction in the overfill prevention device could result in a product P� release that could result in a threat to public health and M. cr safety and environmental damage. Cr Federal us,r rules require that overfill prevention equip- ment automatically restrict flow or alert the transfer 0 3 operator when the tank is no more than 90 percent full or shut off flow into a tank when it is no more than 95 CD percent full.Other alternatives to prevent overfills are the r� (D restriction of flow during a delivery 30 minutes prior to 0) overfillinia',alerting the operator I minute before overfill- n Q ing may occur; or automatically shutting off flow into a iz I tank so that none of the fittings located on top of the tank are exposed to product due to overfilling The committee has written the recommended practices FIGURE 6-8. Measuring sticks used to measure the for automatic shu"' I t t s water level should be securely mounted ensure that must be set to shut lie e r a f they do not move during the test than 95 percent f an Fo( res n an (JCC 23 2018 pei.org ENVIRONMENTAL HEALTH DEPARTMENT