Few BMPs have been investigated with the regards to the problem that pollutants change speciation during the emptying process. This type of sediments that is a mixture of water can be called "wet sediments". These wet sediments can be found in different BMPs like pond, wetland, gully pots, magazines or sediment deposited in the sewer system. In this paper these wet sediments are exemplified by the water phase from a gully pot mix (sediment and water) after the emptying process. The objective of this paper considers the quality of the water phase of this mixture due to the metals cadmium, copper, nickel, lead and zinc in order to make a first characterization of wet sediments. The variation between the gully pots within the two sites is very high. The residential area has higher concentration of metals than the city for both the total and dissolved phase. A first screening was done in order to see if the pollutants change speciation during the cleaning process and the results show that the concentration is much higher in the mixture than in the water stored in the gully pot. The load to the gully pots during one year is higher in the city than in the residential area. This shows that the cleaning frequency is important for the quality of the water phase.