Between late-1960s and early-1970s, three big oil companies planned to house their facilities on Pulau Ayer Chawan for Esso, Pulau Merlimau for Singapore Refinery Company and Pulau Pesek for Mobil Oil.
I tidspunktet mellem slutningen af 1960'erne til starten af 1970'erne planlagde tre olieselskaber at bygge deres fasciliteter på Pulau Ayer Chawan for Esso, Pulau Merlimau for Singapore Refinery Company og Pulau Pesek for Mobil Oil.