# The Planning (Hazardous Substances) Regulations 1992, Paragraph 5: Above ambient temperature vessel conditions


A hazardous substance shall only be present at above its boiling point at 1 bar absolute in a vessel area if—
(a) it was present at above its boiling point at 1 bar absolute in a vessel in that vessel area at any time during the establishment period;
(b) the temperature at which it is present does not exceed the temperature specified in column 9 of Table C;
(c) the vessel in which it is present does not have a greater capacity than that specified in column 10 of Table C; and
(d) the pressure at which it is present does not exceed—
(i) atmospheric pressure, if the substance was not present at above atmospheric pressure at above its boiling point at 1 bar absolute in a vessel in that vessel area at any time during the establishment period; or
(ii) the pressure specified in column 11 of Table C, in any other case.

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Source: https://www.legislation.gov.uk/uksi/1992/656/schedule/3/paragraph/5 (the official version)
Page: https://openlegislation.uk/planning-hazardous-substances-regulations-1992/schedule-3/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.