WEBSTER, N.Y. — Street maintenance crews and local contractors have been busy clearing snow and ice from streets, sidewalks, and parking lots following a recent snowstorm. Tony Zucco, a local contractor, said his salt supply is very low and he is using it at an astronomical rate. He secured his salt supply at the end of summer, which was unusual for him, but the consistent snow and low temperatures this winter have depleted it faster than expected. When temperatures drop low enough, Zucco switches to a product that can melt ice at lower temperatures. And then you salt that.”Zucco says his local salt supply is dwindling, so he is working to conserve and use it more carefully.