NEW YORK (CBSNewYork/AP) Mayor Bill de Blasio’s administration has reached a deal with one of the 150 municipal unions working on an expired contract.

But de Blasio said Tuesday the deal with the small environmental workers union will have little bearing on negotiations with other unions.

The 200-member union had been without a contract for nine years. Its new deal includes the pledge of $50,000 in back pay to each worker.

The other unions — which represent 300,000 workers — have also asked for retroactive raises which could cost the city up to $7 billion.

De Blasio has refused to tip his hand on negotiations.

But the deal could suggest a thawing between City Hall and the unions. During Michael Bloomberg’s third term as mayor, he failed to reach labor deals with any of the city’s unions.

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