# The Planning (Hazardous Substances) Regulations 1992, Paragraph 3: Ambient temperature vessel conditions


A hazardous substance shall only be present at ambient temperature in a non-buried or non-mounded vessel in a vessel area if—
(a) it was present at ambient temperature in a non-buried or non-mounded vessel in that vessel area at any time during the establishment period;
(b) the non-buried or non-mounded vessel in which it is present does not have a greater capacity than that specified in column 5 of Table C; and
(c) the pressure at which it is present in the non-buried or non-mounded vessel does not exceed—
(i) atmospheric pressure, if the substance was not present at above atmospheric pressure at ambient temperature in a non-buried or non-mounded vessel in that vessel area at any time during the establishment period; or
(ii) the pressure specified in column 6 of Table C, in any other case.

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Source: https://www.legislation.gov.uk/uksi/1992/656/schedule/3/paragraph/3 (the official version)
Page: https://openlegislation.uk/planning-hazardous-substances-regulations-1992/schedule-3/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.