In 1980 the Occidental Petroleum Corporation revised its plans and proposed to build a 60,000 barrel (9,539m3)/day residue-upgrading refinery on the site. This aimed to 'satisfy the requirements of the planning and safety authorities as well as our own economic criteria'. But this proposal too was not developed, a consequence of the Iranian revolution when the oil price increased from $13 to $34 per barrel between 1979 and 1981. No further work was undertaken by Occidental on the Canvey site.