The proposal consists of modifications to, replacement of, or expansions of, eight units on the existing plant. The units involved include the:

• hydrofiner unit;
• propane production unit number 1;
• new straight run gasoline 'minalk' unit;
• new catalytic cracked spirit 'minalk' unit;
• new sour water treatment facilities;
• new sulphur recovery unit;
• residue cracker gas recovery unit and propane production unit number 2; and
• residue cracker unit - particulate emissions.