Storage Tank Systems for Petroleum Products and Allied Petroleum Products Regulations (SOR/2008-197)

21 The tank precision leak detection test referred to in section 16 and paragraphs 19(1)(c), 26(a) and 43(b) must

• (a) be capable of measuring the level of water in the tank to within 3 mm with a probability of 0.95 or greater;

• (b) if a volumetric method is used, be capable of measuring the level of liquid in the tank to within 3 mm with a probability of 0.99 or greater;

• (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

• (d) be performed, using a documented and validated method, by an individual trained in the maintenance and use of the test equipment.