Formosa Plastics commissioned the RSEA Engineering Corporation to handle a 170-hectare landfill project in its First Eastern District, which it has just completed. The First Eastern District's full 260 hectares can become land adjacent to the free port. But if in the future, the Second Eastern District of 220 hectares is developed, then there will 500 hectares to use.
這個新興區鄰近麥寮港，現委託榮民工程公司甫完成東一區填海造地約一百七十公頃，預計東一區全部二百六十多公頃完工後，將可以成為自由貿易港區腹地；但如果未來再開發東二區二百八十公頃，腹地將超過五百公頃。