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cbCurtis & Tompkins, Ltd. <br />California Title 26 Metals <br />Lan )+: <br />2UU6.39 <br />Location: <br />Bridgestone/Firestone Metal Shavings <br />Client: <br />MWH <br />Prep: <br />EPA 3050B <br />Project#: <br />4050530.010101 <br />Anal sis: <br />EPA 6010D <br />Matrix: <br />Soi <br />Batc <br />133963 <br />Units: <br />mg/Kg <br />Prepared: <br />01/21/08 <br />Basis: <br />as received <br />Analyzed: <br />01/22/08 <br />Diln Fac: <br />1.000 <br />10.00 <br />9.403 <br />Type: BS Lab ID: QC424888 <br />AnalVte <br />Spikedesu <br />Result <br />%REC <br />Limits <br />Antimony <br />luu.0 <br />92.36 <br />9280-120 <br />91.441 <br />Arsenic <br />50.00 <br />47.11 <br />94 <br />80-120 <br />Barium <br />100.0 <br />92.93 <br />93 <br />80-120 <br />Beryllium <br />2.500 <br />2.556 <br />102 <br />80-120 <br />Cadmium <br />10.00 <br />9.403 <br />94 <br />80-120 <br />Chromium <br />100.0 <br />91.83 <br />92 <br />80-120 <br />Cobalt <br />25.00 <br />22.16 <br />89 <br />80-120 <br />Copper <br />12.50 <br />11.52 <br />92 <br />80-120 <br />Lead <br />100.0 <br />89.23 <br />89 <br />80-120 <br />Molybdenum <br />20.00 <br />19.16 <br />96 <br />80-120 <br />Nickel <br />25.00 <br />22.41 <br />90 <br />80-120 <br />Selenium <br />50.00 <br />44.26 <br />89 <br />80-120 <br />Silver <br />10.00 <br />8.824 <br />88 <br />80-120 <br />Thallium <br />50.00 <br />44.92 <br />90 <br />80-120 <br />Vanadium <br />25.00 <br />23.10 <br />92 <br />80-120 <br />Zinc <br />25.00 <br />22.25 <br />89 <br />80-120 <br />Type: BSD Lab ID: QC424889 <br />Analyte <br />Spiked <br />Result <br />%REC <br />Limits <br />RPD <br />Lim <br />Antimony <br />IUU.0 <br />91.441 <br />80-120 <br />1 <br />20 <br />Arsenic <br />50.00 <br />46.13 <br />92 <br />80-120 <br />2 <br />20 <br />Barium <br />100.0 <br />92.70 <br />93 <br />80-120 <br />0 <br />20 <br />Beryllium <br />2.500 <br />2.537 <br />101 <br />80-120 <br />1 <br />20 <br />Cadmium <br />10.00 <br />9.245 <br />92 <br />80-120 <br />2 <br />20 <br />Chromium <br />100.0 <br />91.52 <br />92 <br />80-120 <br />0 <br />20 <br />Cobalt <br />25.00 <br />21.84 <br />87 <br />80-120 <br />1 <br />20 <br />Copper <br />12.50 <br />11.82 <br />95 <br />80-120 <br />3 <br />20 <br />Lead <br />100.0 <br />87.75 <br />88 <br />80-120 <br />2 <br />20 <br />Molybdenum <br />20.00 <br />18.78 <br />94 <br />80-120 <br />2 <br />20 <br />Nickel <br />25.00 <br />22.15 <br />89 <br />80-120 <br />1 <br />20 <br />Selenium <br />50.00 <br />43.86 <br />88 <br />80-120 <br />1 <br />20 <br />Silver <br />10.00 <br />8.827 <br />88 <br />80-120 <br />0 <br />20 <br />Thallium <br />50.00 <br />44.47 <br />89 <br />80-120 <br />1 <br />20 <br />Vanadium <br />25.00 <br />23.04 <br />92 <br />80-120 <br />0 <br />20 <br />Zinc <br />25.00 <br />22.48 <br />90 <br />80-120 <br />1 <br />20 <br />RPD= Relative Percent Difference <br />Page 1 of 1 9,0 <br />