SIST EN ISO 16712:2007 PDF

Overview

EN ISO 16712:2006 (ISO 16712:2005) is a CEN-adopted international standard for water quality testing that specifies a laboratory method to determine the acute toxicity of marine or estuarine sediments to amphipods. The method covers exposure of sediment-dwelling amphipods to contaminated sediments, sludges or sediments spiked with chemicals, with a biological endpoint based on percent mortality after a 10‑day exposure. The standard is intended for environmental monitoring, risk assessment and sediment quality evaluation.

Key topics and technical requirements

• Test organism: Sediment-dwelling marine or estuarine amphipods (species listed in Annex B). Specimens must be taxonomically identified, derived from a single source/population and of uniform life stage and size; gravid females are excluded.
• Exposure: Acute sediment bioassay with 10‑day exposure; percent mortality at day 10 is the primary endpoint.
• Test vessels & media: Tests are performed in controlled laboratory vessels (standard 1‑litre type is specified in the standard) containing a solid-phase sediment layer and overlying water. Both field-collected sediments and sediments spiked with test chemicals are allowed.
• Test environment: Facilities must be free from contamination and disturbance. Lighting is uniform and continuous to prevent nocturnal amphipod migration; temperature and salinity are controlled to suit the species (see Annex B).
• Sample handling: Procedures cover collection, sieving, transport, holding/acclimation, and preparation of control or reference sediments. Species-specific maximum sizes, optimal salinity and temperature ranges are provided in Annex B.
• Quality control & validity: The standard includes guidance on controls, reference toxicants, reburrowing capability, observation schedules, data expression and test validity criteria.
• Annexes: Normative and informative annexes address reconstituted salt water (Annex A), species parameters (Annex B) and precision data (Annex C).

Applications and users

This standard is used for:

• Sediment toxicity screening and comparative assessments
• Regulatory compliance and sediment quality guidelines
• Impact assessment for dredging, coastal development, wastewater sludge disposal and contaminated site remediation
• Ecotoxicology research and method standardization