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QUALITY CONTROL SUMMARYWG1996781 <br />Metals (ICP) by Method 6010B L1580356-01 <br />Method Blank (MB) <br />(MB) R3885891-1 01/31/23 01:09 <br /> MB Result MB Qualifier MB MDL MB RDL <br />Analyte ug/l ug/l ug/l <br />Lead U 2.99 6.00 <br />Laboratory Control Sample (LCS) <br />(LCS) R3885891-2 01/31/23 01:11 <br /> Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier <br />Analyte ug/l ug/l %% <br />Lead 1000 950 95.0 80.0-120 <br />L1580292-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) <br />(OS) L1580292-01 01/31/23 01:14 • (MS) R3885891-4 01/31/23 01:19 • (MSD) R3885891-5 01/31/23 01:22 <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 ug/l ug/l ug/l ug/l %%%%% <br />Lead 1000 ND 937 955 93.7 95.5 1 75.0-125 1.94 20 <br />1 Cp <br />2 Tc <br />3 Ss <br />4 Cn <br />5 Sr <br />6 Qc <br />7 Gl <br />8 Al <br />9 Sc <br />ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: <br />711 Stantec - San Diego, CA 185851132 L1580356 02/10/23 07:56 27 of 44 <br />ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: <br />711 Stantec - San Diego, CA 185851132 L1580356 02/10/23 10:37 27 of 44