Isn't most of this stuff already known by most of us in the industry?

Prosecutors are probing allegations that a mob-linked demolition firm slipped no-show jobs into the ill-fated Deutsche Bank demolition project, the Daily News has learned.

Among those suspected of getting paid without doing any work is Bruce Greenberg, the convicted-felon brother of reputed Gambino associate Harold Greenberg, according to two sources familiar with the investigation.

Harold Greenberg was barred from getting any financial benefits from the Deutsche Bank job because of his criminal past.

The Manhattan district attorney's office is investigating whether the company that hired Bruce Greenberg, the John Galt Corp., was really controlled by his brother Harold's firm, Safeway Environmental, sources said.

Bruce Greenberg, 55, was listed as an ironworker at the bank job for a brief time earlier this year, the sources said. He recently said he was out on disability after contracting respiratory problems during the cleanup at Ground Zero after the Sept. 11, 2001, terror attacks.

Prosecutors are trying to determine whether Bruce Greenberg and several other Galt employees ever performed any work at the job or put in for more hours than they were entitled to, the sources said.

Yesterday at Bruce Greenberg's home on Staten Island, a man who identified himself as Nick said Greenberg was not there and he didn't know when he would be available.

Bruce Greenberg served time in federal prison for a 1990 conviction in a $1.5 million insurance scam.

The 40-story Deutsche Bank across the street from Ground Zero was ripped open during the Sept. 11 terror attacks and contaminated with toxic dust caused by the collapse of the World Trade Center.

In early 2006, the state hired the Galt firm to take the building down. The job is behind schedule and over budget. On Aug. 18, two firefighters died fighting a blaze in the upper floors, and the Manhattan DA and the state attorney general have launched investigations.

Among the issues the DA is probing is whether Galt covered up payments to mob-linked Safeway Environmental, sources told the Daily News.

The Lower Manhattan Development Corp., which bought the bank tower, allowed Galt to work at the site despite its many ties to Safeway. At the time, Galt had no experience demolishing office buildings and relied heavily on Safeway executives and equipment to do the job.

Galt was hired despite a finding by city investigators that Harold Greenberg was listed as a director of Safeway and that the company tried to hide his involvement from them.

Greenberg was convicted in 1988 of bribing an inspector to ignore asbestos violations and in 1993 of wire fraud.

In allowing the unusual union of Galt and Safeway, the state imposed rules to keep Greenberg and Safeway President Stephen Chasin from receiving financial benefits from Galt.

Sources said Chasin's son, Philip, was also on the Galt payroll at the tower. His work there is also the subject of a no-show probe, one source said.