3. GEOTECHMCAL CHARACTERIZATION OF THE SITE
The industry is situated on a plateau of the Barreiras formation (tertiary). Subsoil is fairly uniform consisting of a layer 8 to l0 m thick of fine to medium clayey sand, with SPT values from 5 to 13, over a fine sand with little clay, SPT from l0 to 20.The water table in the whole area is found at a depth of about 17,0 m. Permeability coefficient from in-situ
tests above and below water table is of the order of 1*10 cm/s, with little variation. The in-situ small hydraulic gradients and relatively low permeability imply very small rates of groundwater flow, thereby favouring the concentration of contamination under the leakage sources.
3. GEOTECHMCAL CHARACTERIZATION OF THE SITEThe industry is situated on a plateau of the Barreiras formation (tertiary). Subsoil is fairly uniform consisting of a layer 8 to l0 m thick of fine to medium clayey sand, with SPT values from 5 to 13, over a fine sand with little clay, SPT from l0 to 20.The water table in the whole area is found at a depth of about 17,0 m. Permeability coefficient from in-situtests above and below water table is of the order of 1*10 cm/s, with little variation. The in-situ small hydraulic gradients and relatively low permeability imply very small rates of groundwater flow, thereby favouring the concentration of contamination under the leakage sources.
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