In December, the sewer authority amended a permit to allow the landfill to use a secondary leachate line, known as the Monahan Avenue/Reeves Street line, or the Green Ridge line. A sewer authority official has claimed the alternate line has always been permissible and the permit change merely fixed a typographical-error omission in prior permits.

However, council President Joe Wechsler said Ms. Maloney’s letter makes “a very strong case that they (the civic groups) are in the right” on the permit-change issue. But the decision to enforce in court a 1990 pact on the issue can only be made by the Courtright administration, he said.