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28-Day Chronic Sublethal Test Method for Evaluating Whole Sediments Using an Early Life Stage of the Marine Polychaete Neanthes arenaceodentata

PURPOSE: This technical note describes a 28-day chronic sublethal test method designed to evaluate the toxicity of contaminated sediments including dredged material. The test method is a modification of the existing N. arenaceodentata chronic sublethal test methods (American Society for Testing and Materials (ASTM) 2007), which incorporates an early life stage of the polychaete. Using an early organism life stage enhances the capability to discern contaminated sediment while increasing the logistical ease with which the test is conducted. As with currently existing N. arenaceodentata test methods, the new test measures effects of contaminants on both survival and growth.