Sediment Quality Assessment

Sediment Quality Assessment

GLEC’s approach to sediment quality and sediment toxicity testing is based upon an integrated approach that assesses sediment quality by combining laboratory in-life exposure of aquatic organisms with chemical monitoring and field based bioassessment techniques.  Our sediment toxicity assessment methods follow written standard operating procedures based on established ASTM and EPA guidelines.  We understand that it is necessary to implement rapid and cost effective methods while maintaining the bioassay precision, accuracy, and reproducibility. GLEC field investigations of benthic community structure complement our laboratory toxicity testing capabilities allowing assessment of benthic community health in receiving waters.  GLEC’s environmental chemistry capabilities complete our integrated approach by providing chemical specific interpretation of sediment quality.  Our staff are thoroughly trained in all aspects of sediment toxicity assessment. Our collections from field investigations are verified by replicated collections and second party verification of taxonomic results.  Collectively, these capabilities enable GLEC to respond efficiently and quickly to even the most challenging of sediment toxicity assessments.

Sediment Quality Assessment

GLEC operates one of the few aquatic toxicology laboratories in the U.S. that maintains NELAP accreditation for sediment toxicity testing and is fully equipped to perform acute and chronic toxicity evaluations of whole sediment, sediment elutriate, and sediment porewater, as well as sediment/tissue bioaccumulation testing and sediment Toxicity Identification Evaluations (TIEs). GLEC’s sediment toxicity assessment methods follow written standard operating procedures that follow the most recent ASTM and EPA guidelines. The laboratory is capable of conducting both static and flow-through sediment evaluations.  GLEC cultures most of its freshwater test organisms in-house to enhance quality control through using organisms of known health.

Contaminated Sediments



Mailee Garton

Traverse City, Michigan
Laboratory Coordinator
Phone: 231-941-2230


GLEC operates one of only a few U.S. laboratories accredited for whole sediment toxicity testing. GLEC also maintains NELAP accreditation for chlorophyll and nutrient chemistry testing.


GLEC's Columbus, OH laboratory is ADEQ accredited for Acute Toxicity and Chronic Toxicity testing.



Great Lakes Environmental Center

739 Hastings Street
Traverse City, MI   49686

Phone: (231) 941-2230
Fax: (231) 941-2240