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100 <br /> WAIT TIME VERSUS TANK VOLUME <br /> (AFTER 50% FILL) <br /> 80 _ <br /> Nominal Wait Time- <br /> 60 - <br /> 40 - . <br /> ime•6040 . . . . <br /> Minimum Wait Time <br /> 20 - <br /> 0 <br /> 0 0 <br /> r <br /> 5 10 15 20 25 30 35 40 45 50 <br /> Irink Vohime (1000 gal) <br /> Tank Deformation <br /> A process in which the underground storage tank expands or contracts causing extreme product level <br /> fluctuations. Tank deformations are normally caused by large amounts of fuel being added <br /> Into an underground tank. Allow adequate time for the product to be delivered and the <br /> subsequent stabilization of the tank. <br /> Amount of Product to be Delivered Before Precision Tank Test <br /> 75% - 90% of tank volume capacity 20 - 36 hours <br /> 50% - 75% of tank volume capacity 14 - 20 hours <br /> 25% - 50% of tank volume capacity 8 - 14 hours <br /> 5% - 25% of tank volume capacity 6 - 8 hours <br /> Note- USTest protocol suggests delivering large amounts of fuel 2 days In advance of the test <br /> and continuous fuel top off until test date. <br />