Black Mayonnaise is a short experimental documentary film about the dredging of the Gowanus Canal, one of the most contaminated bodies of water in the United States. Polluted by more than a century of industrial waste and raw sewage, the canal is now undergoing a Federal Superfund cleanup by the Environmental Protection Agency, unearthing its toxic ‘black mayonnaise’ next to a busy public promenade located in the middle of several busy residential neighborhoods. This documentary is a visual exploration of the dredging process, both above and below the water, and is expected to premiere at film festivals in 2022.