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Standards + Guidelines > Kelly Indices (gasworks) > |
specifically developed for gasworks sites in London:
Suggested Range of Values (mg/kg on air-dried soils, except for pH)
Parameter Uncontaminated Slight Contamination Contaminated Heavy Contamination Unusually Heavy Contamination pH (acid) 6-7 5-6 4-5 2-4 < 2 pH (alkaline) 7-8 8-9 9-10 10-12 > 12 Antimony 0-30 30-50 50-100 100-500 > 500 Arsenic 0-30 30-50 50-100 100-500 > 500 Boron (available) 0-2 2-5 5-50 50-250 > 250 Barium 0-500 500-1000 1000-2000 2000-1.0% > 1.0% Beryllium 0-5 5-10 10-20 20-50 > 50 Cadmium 0-1 1-3 3-10 10-50 > 50 Chromium 0-100 100-200 200-50 500-2500 > 2500 Copper (available) 0-100 100-200 200-500 500-2500 > 2500 Cyanide (free) 0-1 1-5 5-50 50-100 > 100 Cyanide 0-5 5-25 25-250 250-500 > 500 Ferricyanide 0-100 100-500 500-1000 1000-5000 > 5000 Lead 0-500 500-1000 1000-2000 200-10,000 > 10,000 Lead (available) 0-200 200-500 500-1000 1000-5000 > 5000 Mercury 0-1 1-3 3-10 10-50 > 50 Manganese 0-500 500-1000 1000-2000 2000-10,000 > 10,000 Magnesium 0-500 500-1000 1000-2000 2000-1.0% > 1.0% Nickel (available) 0-20 20-50 50-200 200-1000 > 1000 PAHs (Coal Tar) 0-500 500-1000 1000-2000 2000-1.0% > 1.0% Phenol 0-2 2-5 5-50 50-250 > 250 Selenium 0-1 1-3 3-10 10-50 > 50 Sulphate 0-2000 2000-5000 5000-1.0% 1.0%-5.0% > 5.0% Sulphur (free) 0-100 100-500 500-1000 1000-5000 > 5000 Sulphide 0-10 10-20 20-100 100-500 > 500 Thiocyanate 0-10 10-50 50-100 100-500 > 500 Toluene extract 0-5000 5000-1.0% 1.0-5.0% 5.0-25.0% > 25.0% Vanadium 0-100 100-200 200-500 500-2500 > 2500 Zinc (available) 0-250 250-500 500-1000 1000-5000 > 5000 Zinc (equivalent) 0-250 250-500 500-2000 2000-1.0% > 1.0%
Guidelines for classification of contaminated soils - suggested range of values (parts per million) on air dried soils
Note - added to guidelines after publication of ICRCL 59/83:
Guidance for Heavy Metal Contaminants should be sought from parameters listed in ICRCL 59/83
Source: Site investigation and materials problems, Proc. Conference on Reclamation of Contaminated Land, Eastbourne, UK, October 1979 (Society of the Chemical Industry, London 1980).
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[Page created: 11th Nov 65, Last Update: 17h Mar 2000]
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