These other indicators have been studied by co-investigators from the Woods Hole Oceanographic Institution and the University of Maryland . Sediment mixing by benthic organisms and resuspension by bottom currents are two processes which dilute and disperse contaminants that initially settle on the seafloor. Contaminants introduced at the sediment surface since 1986 have penetrated to a depth of 5 centimeters below the seafloor as a result of rapid vertical mixing by organisms living in the sediments. This mixing dilutes material added to the sediment surface, possibly an environmental advantage. However, it also transports contaminants below the level of resuspension thereby increasing the potential for long-term accumulation.
Currents suggest transport of resuspended sediments to the southwest.
The increased flux of sludge-derived organic matter has caused measurable changes in the benthic ecology near the dumpsite.