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cbCurtis&Tompkins, Ltd. <br /> Analytical Laboratories,Since 1878 <br /> Batch QC Report <br /> California Title 26 Metals <br /> La Location: Bridgestone Firestone Metal Shavings <br /> Client: MWH Prep: EPA 3050B <br /> Pro'ect#: 4050530.010101 Analysis: EPA 6010B <br /> Field ID: ZZZZZZZZZZ Batch#: 114869 <br /> MSS Lab ID: 187778-005 Sampled: 06/29/06 <br /> Matrix: Soil Received: 06/29/06 <br /> Units: mg/Kg Prepared: 06/30/06 <br /> Basis: as received Analyzed: 06/30/06 <br /> Diln Fac: 1.000 <br /> Type: MS Lab ID: QC345786 <br /> Ana to MSS Result Spiked Result %REC >Limits <br /> Antimony 2.849 89.29 77.70 31 1-126 <br /> Arsenic 4.532 44. 64 38.83 77 74-120 <br /> Barium 482.1 89.29 406.1 -85 NM 53-134 <br /> Beryllium 0.7497 2.232 2.575 82 78-120 <br /> Cadmium 0.3543 8.929 7.077 75 71-120 <br /> Chromium 10.74 89.29 80.94 79 64-120 <br /> Cobalt 3.396 22.32 19. 65 73 64-120 <br /> Copper 106.2 11.16 106.8 6 NM 56-139 <br /> Lead 537.9 89.29 486.8 >LR -57 NM 57-120 <br /> Molybdenum 0.8313 17.86 14.07 74 68-120 <br /> Nickel 12.96 22.32 27.15 64 48-132 <br /> Selenium <0.09860 44.64 34.19 77 72-120 <br /> Silver <0.04171 8.929 6.723 75 67-120 <br /> Thallium 0.1757 44.64 31.05 69 69-120 <br /> Vanadium 28.85 22.32 42.80 62 55-134 <br /> Zinc 283.8 22.32 317.2 150 NM 46-133 <br /> Type: MSD Lab ID: QC345787 <br /> Ana` to Spiked Result REC Limits RPD Lim <br /> Antimony 103.1 36.86 33 1-126 4 21 <br /> Arsenic 51.55 45.99 80 74-120 4 20 <br /> Barium 103.1 354.1 -124 NM 53-134 16 20 <br /> Beryllium 2.577 2.818 80 78-120 2 20 <br /> Cadmium 10.31 8.421 78 71-120 4 20 <br /> Chromium 103.1 93.97 81 64-120 2 20 <br /> Cobalt 25.77 23.61 78 64-120 6 20 <br /> Copper 12.89 119. 6 104 NM 56-139 10 20 <br /> Lead 103.1 627.9 >LR 87 NM 57-120 NC 20 <br /> Molybdenum 20.62 16.77 77 68-120 4 20 <br /> Nickel 25.77 32.43 76 48-132 8 20 <br /> Selenium 51.55 40.57 79 72-120 3 20 <br /> Silver 10.31 8.057 78 67-120 4 20 <br /> Thallium 51.55 37.19 72 69-120 4 20 <br /> Vanadium 25.77 45.97 66 55-134 1 20 <br /> Zinc 25.77 382.0 381 NM 46-133 17 20 <br /> NC= Not Calculated <br /> NM= Not Meaningful: Sample concentration > 4X spike concentration <br /> >LR= Response exceeds instrument's linear range <br /> RPD= Relative Percent Difference <br /> Page 1 of 1 8.0 <br />