21 The tank precision leak detection test referred to in section 16 and paragraphs 19(1)(c), 26(a) and 43(b) must
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(c) be capable of detecting a leak rate of at least 0.38 L/h within a 24 hour period with a probability of detection of 0.95 or greater and a probability of false alarm of 0.05 or less, accounting for variables such as vapour pockets, thermal expansion and contraction, evaporation and condensation, temperature stratification, groundwater level and tank deformation; and