Navy officials Tuesday upped the estimated amount of sewage that was unintentionally discharged into San Diego Bay over the past two years due to an improperly connected pipe at Naval Base San Diego.

According to Navy Region Southwest, about 14 million gallons of sewage went into the bay over a two-year period -- up from the 10.25 million gallons the military reported when the problem was discovered on Friday.

According to Navy officials, a sewage pipe was improperly connected to a storm drain that empties into the bay during construction of the 1,032-bed, 12-story Palmer Hall Barracks in 2004.

Testing for sewage contamination around the outfall and creek adjacent to the base is under way, but county tests have been negative.

"The Navy remains committed to environmental protection and providing for safe, clean working and living conditions for our personnel and our neighbors," a Navy statement says. "We are working closely with water and environmental authorities to fully address this issue and are investigating to see how such incidents can be prevented in the future."

Work has also begun to clean and sanitize the storm drain pipe affected by the discharge, according to the Navy's public affairs office.