A Homeless man has found a 150-page ground zero blueprint marked "Secure Document — Confidential" and dated October 5, 2007 in a New York City trash can.

The document includes schematics for the thickness of the building's concrete core as well as the location of the building's ventilation and electrical systems.

NEW YORK (AP) - A homeless man has come forward with two sets of confidential ground zero blueprints that he says were dumped in a Lower Manhattan trash can.

The man brought the Freedom Tower plans to the New York Post, which says the 150-page schematic is marked: "Secure Document—Confidential."

The documents are dated Oct. 5, 2007. They contain plans for each floor, the thickness of the concrete-core wall, and the location of air ducts, elevators, electrical systems and support columns.

The agency that owns the World Trade Center site, the Port Authority of New York and New Jersey, calls it a serious security lapse.

Spokeswoman Candace McAdams says mishandling the blueprints would be "cause for serious disciplinary action."  

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