Did they add antifreeze to the plumbing of the skimmers or the skimmer basket? Essex County is definitely colder (for the most part) than Monmouth county, but a few degrees and another 2 feet of snow is really no big deal. The skimmers could fill up and leak a little and they were just taking precautions. A lot of times, they are justifying doing their jobs. Assuming water was at normal level as well and they did not lower 1" below the skimmer, unless you performed this task.