Fats, Oils and Grease are also known as FOG, which comes from food such as cooking oil, lard, shortening, meat fats, sauces, gravy, mayonnaise, butter, ice cream and soups. Sink, dishwasher, hood and floor cleaning wastewaters and food scraps may also be sources of FOG. FOG can either be liquid or solid and may turn viscous or solid as it cools in the underground sewer.
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