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I F Purl F E zI;H I!i_+l HT; 1 F'HGE 004 <br /> i . <br /> Apni 28, 1992 <br /> Updated <br /> SUMMARY OF TYPICAL METALS CONCENTRATIONS <br /> IN SOILS AND SURFICIAL MATERIALS <br /> FROM U.S.G.S. PROFESSIONAL PAPER 1270 <br /> FOR. THE CONTERMINOUS UNITED STATES <br /> (values are in ppm unless % shown) <br /> Metals Southbay Northbay S F. U S Mean Notes <br /> Aluminum 70% 7.0c1t, 10.0%+ 47% <br /> Antimony *+ - 1 3-10 <1 0.48 1 <br /> Arsenic *+$ 6.5 16-65 10 5.2 1 <br /> Barium +$ 700 500 1000-3000 440 1 <br /> Beryllium *+ <1 <1 <1 0.63 1 <br /> Boron <20 50 30 26 <br /> Bromine - 111-30 0.6-0 8 056 <br /> Cadmium *+$ - - - - 1, 2 <br /> Calcium 18-28% 35- 52% 1.8-2.9% 0.92c7v <br /> Carbon - 5-8% 01-0.50/0 1.6% <br /> i <br /> Centum <150 <150 <150 63 <br /> Chromium *+$ 100-700 100-700 100-700 37 1 <br /> Cobalt+ 15-70 15-70 15-70 6.7 1 <br /> Copper *+ 30 50-300 50-300 17 1 <br /> Fluorine 180-270 - - 210 <br /> Gallium 30-70 20 15 13 <br /> Germanium - 15% 10% 1.2% <br /> Iodine - 06-1.1 <0.5 0.75 <br /> Iron 3.0% 5-10% 5-10% 18% <br /> Lanthanum <30 30-50 <30 30 <br /> Lead *+$$ 30-300 30-300 30_ 1 300 6 1 <br /> Lithium 30 41-150 16 20 <br /> Magnesium 15-5% 10,71) 1.5-5%a 0.44% <br /> Manganese 500 500 1000-7000 330 <br /> Mercury *+$ 0 2-1 3 082- 13 0 2-1 3 058 1 <br /> Molyb-denurn+ <3 <3 <3 059 1 <br /> Neodymium C70 70 - 40 <br /> Nickel *+ 30-200 30-200 30-200 13 1 <br /> Niobium <10 <10 <10 9 3 <br /> Phosphorus 820-2400 - - 260 <br /> E <br />