The metal concentrations obtained from the sediment samples of three different farms were compared with Sediment Quality Guideline
which showed that, concentration of Cd, Cr, Pb were below lowest effect level (LEL) while Cu concentration exceeds the lowest effect level (LEL) and Ni concentration exceeded the lowest effect level and the threshold effect concentration (TEC) shown in Table 6.
Table-5: Mean values for the total aromatic hydrocarbons (TArH) in the studied sites compared with the sediment quality guidelines
: sediment concentration (ppm, dry weight), effects range low (ERL), and effects range median (ERM) for the five sites.
Potential ecological risk analysis (RI) and biological toxicity test based sediment quality guidelines
(mERM-Q) applied to the results to assess the environmental risks of heavy metals in the region (As, Cr, Cu, Pb, Zn).
[19.] Concensus based sediment quality guideline
(2003) Wisconsing Department of Natural Resources.
 CCME, "Canadian sediment quality guidelines
for the protection of aquatic life: summary tables.
Development and eval-uation of consensus-based sediment quality guidelines
for freshwater ecosystems.
When compared with sediment quality guidelines
, Narragansett Bay sediment collected from the "100 Lobsters" sampling site where shell disease is prevalent showed that concentrations of several metals were intermediate between effect range low (ERL) and effect range median (ERM) sediment quality values, which are based on an extensive compilation of sediment toxicity tests.
Prediction of sediment toxicity using consensus-based freshwater sediment quality guidelines
. Prepared by U.S.
Use of sediment quality guidelines
and related tools for the assessment of contaminated sediments; proceedings.
Also included are the ANZECC sediment quality guidelines
for certain metals (ANZECC 2000).
"Sediment concentrations above the Canadian Sediment Quality Guidelines
for the Protection of Aquatic Life for chromium, arsenic and copper are primarily located within 100 metres of the ash lagoon discharge."
Chemical results need to be combined with modeling studies and associated biological effects examined in concert with sediment quality guidelines
. Chemists play a critical role within a multidisciplinary team comprised of hydrologists, oceanographers, marine biologists, ecologists, toxicologists and/or engineers to give a clear picture to the public and regulators of the present state and future needs of Canada's marine environments - especially the most badly impacted environments close to urban and industrial centers.