Storage Tank Systems for Petroleum Products and Allied Petroleum Products Regulations
17 (1) The owner or operator of a storage tank system installed before the coming into force of these Regulations that has single-walled underground piping must test that piping using a piping precision leak detection test in accordance with section 24 within two years after the day on which these Regulations come into force and after that test they must
(i) use continuous external underground pipe leak monitoring,
(ii) use automatic tank gauging in accordance with section 18, or
(iii) use continuous in-tank leak detection in accordance with section 20; or
(b) annually perform a piping precision leak detection test in accordance with section 24.
(2) The continuous external underground pipe leak monitoring must
(a) be carried out using a sensor cable system designed for installation adjacent to the piping and within the same pipe trench;
(b) be capable of detecting a leak rate of at least 0.38 L/h within 96 hours after the onset of the leak at the lowest expected soil temperature at the site where the sensor cable system is installed;
(c) be capable of locating the leak with an accuracy of ± 1 m;
(d) be capable of continuously monitoring sensor cable system integrity; and
(e) have an alarm located at a place of work where it can be readily heard and seen.
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