A contractor was fined after officials found workers dumping oil into city sewers.
An unknown person dumped the grease down a sewer grate, coating a ConEd transformer.
An official at the DEC is concerned the green-up project could lead to more heating oil spills.
Officials said the heating oil spill cleanup will go on for an undetermined amount of time.
Trucks and fumes have been a problem since heating oil spilled in a basement on the block.
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