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BSKANALYTICAL <br /> LABORATO-RIES <br /> QC Summary Report 09/16/2002 1111111 IIIII Illll IIIII Illli 111111111111111IIIIIIIIII 11111111 <br /> BSK Submission 2002090559 <br /> Client Caltest Analytical Laboratory <br /> Date Submitted 09/11/2002 <br /> Project ID C090305 <br /> Project Desc <br /> BSK StarLims Run# 43052 lllllllll1111V11Illllllllllllfilli Instrument ID { <br /> Analyst Initials MARIAM Method Number CR6_IC <br /> Analyte Results Matrix %Ree Spike Spk Matrix <br /> Analyte QC Type Spike ID Resiilt Units or RPD RPD Conc Conc UCL LCL Date <br /> Chromium-Hexavalent(Cri-6) LCS N/A 191 pg/L 95 2 ND 130 70 09/11/02 Acceptable <br /> Chromium-Hexavalent(Crt6) L.CSD N/A 200 µg/I, 100 47 2 ND 130 70 09/11/02 Acceptable <br /> Chromium-Hexavalent(Cr+-6) MS 247164 21 1 µg/L I05 20 ND 130 70 09/11/02 Acceptable <br /> MS 247175 454 pg/L 106 4 030 130 70 09/11/02 Acceptable <br /> MS 247285 51 gg/L 109 4 070 130 70 09/11/02 Acceptable <br /> Chromium-Hexavalent(Cr}6) MSD 247164 21 7 pg/L 108 29 20 ND 130 70 09/11/02 Acceptable <br /> MSD 247175 468 pg/L 109 3 4 030 130 70 09/11/02 Acceptable <br /> MSD 247285 51 pg/L 109 00 4 070 130 70 09/11/02 Acceptable <br /> Chromium-Hexavalent(Cr+-6) RBLK N/A 0� pg/L — <1 0—` ———W `——1 0 N/A 09/11/02 Acceptable <br /> Approved by- <br /> %Rcc Percent Recovered Parent Sample Sample used as background matrix for MS/MSD Page I of 1 <br /> RPD Relative Percent Difference OOS-High QC Result Above UCL <br /> UCL Upper Control Limit OOS-Low QC Result Below LCL <br /> LCL Lower Cngtrol Limit <br />