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pei.org 11 <br />Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities <br />4.3.4 Test Conditions. The primary contain- <br />ment may contain any level of product. Determine <br />whether the groundwater depth is above the bottom <br />of the tank. Consult specific manufacturer’s proce- <br />dures in regards to groundwater and performing the <br />test. No bulk deliveries shall occur within 8 hours <br />prior to conducting or during the test. No dispens- <br />ing may occur during the test. <br />4.3.5 Preparation. Determine the volume of <br />the tank and identify the test being performed. <br />Tank volume information is available from facility <br />records or the ATG readout. Prepare a monitoring <br />fluid solution to add to the interstitial space. <br />4.3.6 Steel Tanks. Liquid-filled (hydrostatic) <br />tests on steel tanks require the same fluid as the <br />monitoring fluid. Contact the manufacturer for <br />instructions. <br />4.3.7 Fiberglass Tanks. Determine tank size <br />and diameter and apply the appropriate method. <br />4.3.8 Test Equipment. Test equipment shall <br />include: <br />• monitoring fluid; <br />• stopwatch or other time-measurement device <br />capable of measuring a 1-second increment; <br />• tape measure. <br />4.3.9 Test Procedure. <br />1.Remove any sensor that may be installed in the <br />tank interstitial space. <br />2.Determine and record the groundwater level. <br />3. Add test liquid to the tank interstitial <br />space, bringing the fluid level into the riser <br />(standpipe) to the appropriate level based on <br />the manufacturer’s written procedure. <br />4.Document the starting level and start time of <br />the test. <br />5.Start the time-measurement device. <br />6.Wait the appropriate time according to the <br />manufacturer’s test procedure. <br />7.Document the ending level and ending time of <br />the test. <br />8.Determine and record the groundwater level. <br />9.Remove liquid added to the tank interstitial <br />space, and restore the liquid level in the tank <br />interstitial to normal operating condition. <br />10.Reinstall the sensor so that it is installed within <br />manufacturer’s specifications. <br />4.3.10 Pass/Fail Criteria. Compare the data to <br />the manufacturer’s pass/fail criteria in Appendix A <br />to determine if the tank has passed the test.