The facility can hold up to 6.75 million barrels.
Sam Teicher, with Coral Vita, a group that works to protect reefs, toured the area near the facility Thursday.
"The white cylinders were covered with oil slick, and there were slicks going well around the facility and out into the road and the forest," Teicher told NPR. "There were a few workers there assessing the damage, but very few people have been able to even get out to that point."
The facility was closed Aug. 31 in preparation for the storm and will remain closed, company officials said.
"The situation in the Bahamas is still challenging and infrastructure has sustained severe damage," the company said in a statement. "All required resources are being mustered and our primary concern is to ensure the safety of our employees and the environment. We are mobilizing people and equipment to respond to the spill as soon as possible."