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WG1374211 QUALITY CONTROL SUMMARY ONE LAB.NATIONWIDE. <br /> Metals (ICP) by Method 6010B L1155718-01 <br /> Method Blank (MB) FP1(MB)R3468376-1 11/04/1911:05 <br /> MB Result MB Qualifier MB MDL MB RDL FTc <br /> Analyte mg/kg mg/kg mg/kg <br /> Arsenic U 0.460 2.00 <br /> Cadmium U 0.0700 0.500 FSS <br /> Chromium U 0.140 1.00 <br /> Lead U 0.190 0.500 4 <br /> Cn <br /> Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) FSr <br /> (LCS)R3468376-6 11/04/1914:24•(LCSD)R3468376-7 11/04/19 14:26 <br /> Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits <br /> Analyte mg/kg mg/kg mg/kg % % % % % <br /> Arsenic 100 95.2 98.7 95.2 98.7 80.0-120 3.56 20 <br /> Cadmium 100 95.6 98.7 95.6 98.7 80.0-120 3.22 20 GI <br /> Chromium 100 98.1 101 98.1 101 80.0-120 3.05 20 <br /> Lead 100 97.4 101 97.4 101 80.0-120 3.65 20 rAl <br /> L1155735-11 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) [Sc <br /> (OS)L1155735-11 11/04/1911:12•(MS)R3468376-4 11/04/1911:20•(MSD)R3468376-5 11/04/1911:22 <br /> Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec.Limits MS Qualifier MSD Qualifier RPD RPD Limits <br /> Analyte mg/kg mg/kg mg/kg mg/kg % % % % % <br /> Arsenic 100 10.5 94.8 92.9 84.2 82.3 1 75.0-125 2.03 20 <br /> Cadmium 100 0.0946 88.2 86.2 88.1 86.1 1 75.0-125 2.33 20 <br /> Chromium 100 48.6 139 133 90.5 84.5 1 75.0-125 4.42 20 <br /> Lead 100 45.4 196 149 151 103 1 75.0-125 J5 J3 27.5 20 <br /> ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: <br /> AECOM-BNSF Region 4 60599304 L1155718 11/07/19 13:44 9 of 13 <br />