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il!ii i � y3 It : tt I �E'SFIN !1!i,,,filV _ <br /> �� • Fya¢ . VtJ1 <br /> April 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 /> Aluminur, 1.0% 7.0% 10.0%+ 4.7% <br /> Antimony *+ - 1.3-10 <I 0.48 1 <br /> Arsenic *+$ 6.5 16-65 10 5.2 1 <br /> Ban-am +$ 700 500 _ 1000-3000 440 1 _ <br /> Beryllium *+ <1 <1 <1 0.63 1 <br /> Boron <20 50 30 26 <br /> Bromine - 1.1.3.0 0.6-0.8 0.56 <br /> Cadmium *+S - - - 1, 2 <br /> Calcium 1.8-2.8% .35-.527o 1.8-2.8% 0.92% <br /> Carbon - 5-8% 0.1-0.5% 1.6% <br /> Cerium <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-Mud 50-300 17 1 <br /> Fluorine 180-270 - - 210 <br /> Gallium 30-70 20 15 13 <br /> Germanium - 1.5% 1.0% 1.2% <br /> Iodine - 0.6-1.1 <0.5 0.75 <br /> Iron 3.0% 5-10% 5-10% 1.8% <br /> Lanthanum <30 30-50 <30 30 <br /> Lead *+S 30-300 30-300 30-300 16 1 <br /> Lithium 30 41-150 16 20 <br /> Magnesium 1.5-5% 1.0%, 1.5-5% 0.44% <br /> Manganese 500 5G0 I000-7000 330 <br /> Mercury *+S 0.2-1.3 .082-.13 0.2-1.3 .058 1 <br /> Molybdenum + <3 <3 <3 0.59 1 <br /> Neodymium <70 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 />