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—
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;
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
the pressure at which it is present in the non-buried or non-mounded vessel does not exceed—
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
the pressure specified in column 6 of Table C, in any other case.