OAKLAND -- In a small step forward for a new A's stadium on the Oakland waterfront, the Port of Oakland is advising its board of directors to reject three maritime proposals for Howard Terminal.

If the Board of Port Directors agrees to reject the proposals during its Feb. 13 meeting, the port could return with a recommendation to begin negotiations with a team of prominent businessmen who want to secure permits and environmental approval for a ballpark at the 50-acre terminal north of Jack London Square.

There is no timeline for making a decision on what to do with the terminal, Port spokesman Robert Benardo said.

The Oakland-based business group, which includes Clorox CEO Dan Knauss and developer Mike Ghielmetti, has pushed for a waterfront stadium that could spur nearby development. However, A's co-owner Lew Wolff has repeatedly said the site isn't viable.

Port staffers cited environmental concerns in advising its board to reject proposals from Bowie Resource Partners and California Capital Group. They recommended against entering into long-term lease talks with Schnitzer Steel because the company only wanted a small section of the terminal.