3.24. Every building must be designed and constructed in such a way that an oil storage installation, incorporating oil storage tanks used solely to serve a fixed combustion appliance installation providing space heating or cooking facilities in a building, will–
(a)reduce the risk of oil escaping from the installation;
(b)contain any oil spillage likely to contaminate any water supply, groundwater, watercourse, drain or sewer; and
(c)permit any spill to be disposed of safely.