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Table 6 Limit values according to quality guidelines for inert waste, soil, sediment and water

From: Characterization and assessment of potential environmental risk of tailings stored in seven impoundments in the Aries river basin, Western Romania

Parameter Leaching limit values for inert waste[35] Soil guidelines for less sensitive use[33] Sediment quality guideline[34] Surface water quality standardsa[34] Threshold value for groundwater[37]
   Threshold Trigger    
  mg kg-1 mg kg-1 mg kg-1 mg kg-1 mg l-1 mg l-1
Al - - - - - 0.2b
Fe - - - - 0.3–2 0.2b
Mn - 2000 4000 - 0.05–1 0.05b
Ba 20 1000 2000 - - -
Zn 4 700 1500 150 0.1–1 5b
Pb 0.5 250 1000 85 0.005–0.05 0.01b
Cu 2 250 500 40 0.02–0.1 0.1b
Ni 0.4 200 500 35 0.01–0.1 0.02b
Cr 0.5 300 600 100 0.025–0.25 0.05b
As 0.5 25 50 29 0.01–0.1 0.01b
Cd 0.04 5 10 0.8 0.0005–0.005 0.005b
Co - 100 250 - - -
V - 20 40 - - -
Ag - 200 400 - - -
F- 10 - - - - -
Cl- 800 - - - 25–300 250
SO42- 1000 - - - 60–300 310
NO3+ - - - - 1–11.2 50b
NH4+ - - - - 0.4–3.2 0.7
  1. a Minimum value-very good ecological status; maximum value-bad ecological status;
  2. bMAC (Maximum Allowable Concentrations) for drinking water [40].