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Sediment Quality Guiuclines DRAFT Page 2 <br /> Guidelines: <br /> A. Sediment pore water concentrations may be compared with Chronic NAWQC <br /> to determine whether sediment toxicity is expected. <br /> B. Sediment Quality Guidelines for Non-Ionic Organic Pollutants: <br /> SQG=(Chronic NAWQC) [0.983(Ko„.) + 0.000281 (fo,) <br /> SQG is in units ofµg of pollutant per gram of sediment (gg/g or mg/kg). <br /> Chronic NAWQC is in units of mg of pollutant per liter of water (mg/1). <br /> C. Sediment Quality Guideline for Mixtures (e.g., PAHs): <br /> If the sum of the ratios of sediment concentrations to sediment quality <br /> guidelines is less than unity <br /> E([Sediment PAH];/ [SQG for PAH];) < 1.0 <br /> sediment toxicity is not expected from these pollutants. <br /> D. Sediment Quality Guidelines for Metallic Pollutants (Cd, Cu, Ni, Pb, Ag, and <br /> Zn): <br /> I. When the sum of molar concentrations of SEM is less than the molar <br /> concentration of AVS <br /> E[SEM] <AVS <br /> little unassociated metal should be present and toxicity is not expected. <br /> 2. Wheel the sum of the ratios of interstitial water concentrations of SEM to <br /> Chronic NAWQC, is less than unity <br /> E([Metali,]/[Chronic NAWQC]) < 1.0 <br /> sediments should not be toxic due to these metals. <br /> Reference: <br /> Walter J. Berry and David R. Mount, USEPA, The Use of Equilibrium Partitioning in the <br /> Derivation of Sediment Quality Criteria and Guidelines, 1997 Sort Course: Use of <br /> Sediment Quality Guidelines in the Assessment and Management of Contaminated <br /> Sediments, Society of Environmental Toxicology and Chemistry 18th Annual Meeting, <br /> San Francisco <br /> N 17 November 1998 <br />