FOR a full month, the Balongan oil refinery in West Java was out of commission. It started in early October. The routine maintenance shutdown which had to occur on this, one of state oil and gas company Pertamina's mainstay refineries, gave its owner a headache. "With each routine maintenance shutdown, Pertamina is forced to add to its crude oil imports to make up the resulting production shortfall," Pertamina spokesperson Ali Mundakir told Tempo la