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The Research Vessel Mudpuppy II

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In order to assist the Areas of Concern with determining the nature and extent of sediment contamination, the Great Lakes National Program's Research Vessel Mudpuppy II to conduct sampling across the Great Lakes tributaries and rivers. 

Research vessel Mudpuppy II on Morrow Lake

Samplers on board the R/V Mudpuppy II collecting a sediment grab with a Standard Ponar. Click for larger image.

The R/V Mudpuppy II is a 32-foot flat-bottom boat specifically designed for sediment sampling in shallow rivers and harbors. 

It is equipped with a vibro-coring unit that allows the sampling of cores up to 15 feet long from locations with water depth between 2 and 50 feet.

Once samples are collected, they can be processed on the boat or at a land based facility.

It is equipped with a differentially corrected global positioning system (GPS) with submeter accuracy that allows for precise and accurate determinations of sample locations.

Once samples are collected, they can either be subsampled and processed onboard or at land-based facilities.

A trailer allows the vessel to be transported easily from one project location to the next. 

To date, the R/V Mudpuppy II has been used to perform sediment assessments at 27 Great Lakes AoCs in the United States. 

The bulk of this work has been conducted to collect information on the physical, chemical, and biological nature of sediments, allowing the three-dimensional mapping of these project sites.

Typically, projects use a two-phased sediment assessment approach.

The first phase includes a comprehensive sampling of the entire AoC to help pinpoint the location of "hot spots."

These "hot spots" are then delineated in the second phase to provide information necessary for making remedial decisions.

The overall goal of this effort is to generate the information needed to make scientifically defensible remediation decisions. 

EPA typically works closely with state agencies and local communities involved in the RAP process to develop sampling plans, testing protocols, and QAPPs for individual projects.

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