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Spill Containment Hydrostatic Test Procedures

1. Prior to conducting the test, any accumulated trash, debris, or product present must be removed from the containment device and properly disposed.


2 Any missing or damaged fill caps or adapters should be replaced prior to conducting the test.


3. Damaged containment devices should not be tested, but should instead be noted on the results sheet and reported to the DNREC-TMB in accordance with the reporting requirements listed below.

4. the containment device contains a drain, it must be plugged using a temporary or permanent plug prior to conducting the test. If the drain cannot be made tight, the test is invalid and the containment device must be repaired or replaced.


5.  Fill the containment device to the top. Please note that, if the containment device is properly installed, the fill pipe cap should be submerged. The test is not automatically invalidated if the cap is not submerged. However, the condition should be noted on the test report and must be addressed if the spill containment device is replaced at some time in the future.


6. Place a rigid straight-edge across the top of the containment device. The straight edge should be secured in place or its location marked to ensure accurate measurements. Allow the water to “settle” in the containment device. Using a measuring device that is accurate to 1/16th of an inch, measure the distance perpendicular from the straight edge to the top of the water’s surface, and record the result.


7. Cover the containment device, using its lid or an alternative cover, and allow the containment device to sit undisturbed for one (1) hour for an annual test. Tests for new installations or containment device replacements must sit undisturbed for 24 hours.


8.After the allotted time frame specified in #7 has elapsed, measure the height of the water level as described above. The test fails if the water level drops 1/8th of an inch or more.


9. All water must be removed


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State Compliance Underground and Above Ground Fuel