Storage Tank Systems for Petroleum Products and Allied Petroleum Products Regulations
16 The owner or operator of a storage tank system installed before the coming into force of these Regulations that has single-walled underground tanks must test those tanks using a tank precision leak detection test in accordance with section 21 within two years after the day on which these Regulations come into force and after that test they must
(i) use automatic tank gauging in accordance with section 18, or
(ii) use continuous in-tank leak detection in accordance with section 20; or
(b) annually perform a tank precision leak detection test in accordance with section 21.
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