Journal of Waste Management / 2016 / Article / Tab 2 / Research Article
Chromium Distribution and Spatial Variations in the Finer Sediment Grain Size Fraction and Unfractioned Surficial Sediments on Nyanza Gulf, of Lake Victoria (East Africa) Table 2 Evaluation of sediment quality using the available threshold, mid-range, and extreme effect values (values given as % of samples exceeding the value for Cr).
(a) Threshold effect sediment quality guideline values (mg/kg) Unfractioned sediments ( ) <63 µ m grain size fraction ( ) TEL (37.3) 20.7% 7.1% ERL (80) 6.9% 0% MET (55) 14% 3.6% LEL (26) 51.7% 21.4% CB-TEC (43.4) 17.2% 7.1%
(b) Mid-range effect sediment quality guideline values (mg/kg) Unfractioned sediments <63 µ m grain size fraction PEL (90) 6.9% 0% ERM (145) 0% 0% EC (PEL) (160) 0% 0%
(c) Extreme effect sediment quality guideline values (mg/kg) Unfractioned sediments <63 µ m grain size fraction TET (100) 0% 0% SEL (110) 0% 0% CB (PEC) (111) 0% 0%
TEL : threshold effect level; ERL/M : effects range low/medium; LEL : lowest effect level; CB : consensus based; MET : minimal effect level; SQAV: sediment quality advisory value (36 mg/kg threshold value); ISQG : interim sediment quality guideline (80 mg/kg threshold value); PEC: probable effect concentration; PEL: probable effect level; SEL: severe effect level; TET: toxic effect threshold; [57 ] : Australian and New Zealand Environment and Conservation Council (81 mg/kg threshold value); EC-TEL (52.3 mg/kg threshold value); NOAA-ERL (81 mg/kg threshold value); (a: [58 ]; b: [59 ]; c: [60 ]; d: [61 ]).