AOC L consists of a partially buried, compartmentalized, 25-foot by 40-foot concrete vault. The vault is located north of the former Main Operational Area, north of the main road crossing the former NASD, and approximately 200 feet from the beach. The area surrounding the vault consists of low-growing vegetation (grasses and shrubs). It is suspected that the vault was in existence when the area was used for sugarcane farming. Currently, the vault consists of a dry cement container with an opening on top. There is a spill overflow at the northeast corner of the vault. There are no indications that the vault was used for industrial purposes, but because actual historical use of the site is unknown, the site was investigated.

The site-related constituents detected at this site do not present an ecological or human health risk concern; therefore, it was recommended for NFA.