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Table 2: Soil Background Element Concentrations for California Code of Regulations(CCR)Title 22 <br /> Metals in Parts per Million(ppm)* . <br /> Element: Sb As Ba Be ! Cd Cr Co Cu Pb <br /> World Average:',',3 2-10 5-6 500 6 0.5-1 50-200 8-10 20 10-20 <br /> Range:'2.3 - 0.1-50 100-3,500 0.1-40 0.1-0.7 5-3,000 1-40 2-100 1-200 <br /> Climate:' <br /> Temperate: - - 150-3,000 - - 7-300 1-45 25 40 <br /> Arid: - - 10-1,500 - - 200-500 10-100 15-100 20 <br /> Tropical(humid): - - 10-3,000 - - 150-300 1-50 10-150 20 <br /> U.S.A. Average:' 0.66 7.2 580 580 - 37 9.1 25 19 <br /> Range:4 <1-8.8 <0.1-97 10-5,000. <1-15 1-2,000 <3-70 <1-700 10-700 <br /> Calif. Average:' - - - - 0.34 15.4 - 14.6 16.6 <br /> Range:' <0.1- 4-32 - 4-33.3 8.1-269 <br /> 0.24 <br /> TTLC* 500 500 10,000 75 100 500* 8,000 2,500 1,000 <br /> 2,500** <br /> Element: Hg Mo Ni Se Ag Tl V Zn <br /> World Average'.',' 0.03 2 30-40 0.2 0.1 0.1 80-100 50 <br /> Range',2-' 0.01-0.8 0.2-5 5-5,000 0.01-38 0.1-5 - 20-500 10-300 <br /> Climate:' - 1-5 25 - - - 10-400 10-600 <br /> Temperate: <br /> Arid: - 2-5 50 - - - 10-300 10-900 <br /> Tropical (humid): - 1-5 40 - - 10-300 10-400 <br /> U.S.A. Average:" 0.09 0.97 19 0.39 - 80 60 <br /> Range:' <0.01-4.6 <3-15 <5-700 <0.1-4.3 - - <I-500 <5-2,900 <br /> Calif. Average:' - - 14.1 - - - - 60.4 <br /> Range:' - - 5.4-24.5 - - - - 5-142 <br /> TTLC* 20 3,500 2,000 100 500 700 2,400 5,000 <br /> Notes: * Values in parts per million(ppm)in pg/g or mg/kg. Average values are based on arithmetic means. <br /> U.SA averages are based on 354 to 1,319 analyzed samples. California averages are based on 6 to 25 <br /> analyzed soils. <br /> ** TTLC= Total Threshold Limit Concentrations per California Code of Regulations(CCR) Title 22 - <br /> 66261.24. <br /> *** Cr+ <br /> # Cr and Cr`compounds <br /> Hygienetics® <br /> Environmental <br />