Tellus Survey 2005-2006 The Tellus geochemical survey began in the summer of 2004 and was completed in 2006. This was a multi-media survey of soil, stream-sediment and stream-water samples in rural and urban areas. The results will establish the natural geochemical baseline signature and any man-made overprint. Tellus Soils For rural soils, samples were collected at an interval of approximately one site per 2 km2 (about one site every 500 acres). Samples were collected from two depths (20 cm and 50 cm) at each site to provide an insight into vertical geochemical variations. The samples were analysed by XRF for Ag, Al2O3, As, Ba, Bi, Br, CaO, Cd, Ce, Cl, Co, Cr, Cs, Cu, Fe2O3, Ga, Ge, Hf, I, In, K2O, La, MgO, MnO, Mo, Na2O, Nb, Nd, Ni, P2O5, Pb, Rb, SO3, Sb, Sc, Se, SiO2, Sm, Sn, Sr, Ta, Te, Th, Tl, TiO2, U, V, W, Y, Yb, Zn, Zr. Au, Pt and Pd were analysed by 10g Fire Assay SO4 by Aqua Regia ICP-MS pH and Loss on Ignition were also recorded. Tellus Drainage The drainage dataset contains stream waters and stream sediment analysis and are a combination of two surveys. The first, the G-Base survey, was carried out between 1994 and 1996 in the west of Northern Ireland. In 2005 and 2006 a second survey was carried out as part of the Tellus project in the areas not covered by the original survey. Stream waters The G-Base samples (1994-1996) were analysed for the following anions and fluid parameters: Bicarbonate, Chloride, Fluoride, Nitrate, Sulphate, Dissolved Organic Carbon, Conductivity, pH. Samples were analysed for the tracer elements Ag, Al, Al, As, B, Ba, Be, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, La, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Rb, Sb, Se, Si, Sr, Tl, U V, Y, Zn, Zn, Zr. The Tellus samples (2005-2006) were analysed for the following anions and fluid parameters: Bicarbonate, Bromide, Chloride, Fluoride, Nitrate, Nitrite, Orthophosphate, Sulphate, Dissolved Organic Carbon, Alkalinity, Conductivity, pH. Samples were analysed for the trace elements Ag, Al, As, Au, B, Ba, Be, Bi, Ca, Cd, Co, Cr, Cs, Cu, Fe, Hg, Ho, K, La, Li, Mg, Mo, Mn, Na, Ni, P, Pb, Pd, Pt, Rb, Rh, Sb, Se, Si, Sn, Sr, Th, Tl, U, V, Y, Zn, Zr. Stream sediments The G-Base samples (1994-1996) were analysed by XRF for Ag, As, Ba, Bi, CaO, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, K2O, La, MnO, Mo, Nb, Ni, P2O5, Pb, Rb, Sb, Se, Sn, Sr, Th, TiO2, U, V, W, Y, Zn, Zr. Au, Pt and Pd were analysed by 10g Fire Assay. B was also analysed. The Tellus samples (2005-2006) were analysed by XRF for Al2O3, Ag, As, Ba, Bi, Br, CaO, Cd, Ce, Cl, Co, Cr, Cs, Cu, Fe2O3, Ga, Ge, Hf, I, In, K2O, La, MgO, MnO, Mo, Na2O, Nb, Nd, Ni, P2O5, Pb, Rb, S, Sb, Sc, Se, SiO2, Sm, Sn, SO3, Sr, Ta, Te, Th, TiO2, Tl, U, V, W, Y, Yb, Zn, Zr. Au, Pt and Pd were analysed by 10g Fire Assay. B was also analysed. The surveys followed the British Geological Survey's Geochemical Baseline Survey of the Environment (G-BASE) standard developed over many years that defines the specifications for mapping the regional geochemistry of the United Kingdom. For further information visit the Tellus webpages: http://www.bgs.ac.uk/gsni/tellus/