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s <br /> Submission #: 2a01-04-0346 <br /> STL ChromaLab <br /> Environmental Services(CA 1094) <br /> To: Camp Dresser&McKee Test Method: 7196A <br /> Attn: Mike Gray Prep Method: 7196A water <br /> Batch QC Report <br /> Hexavalent Chromium <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001104/1 <br /> 7-01.31 <br /> LCS: 2001104117-01.31-002 Extracted: 041171200118:45 Analyzed 041171200118:45 <br /> + LCSD: 2001104117-01.31-003 Extracted: 04!17!2001 18:45 I Analyzed 04/17/2001 18:45 <br /> Compound Conc. j mg/LExp.Conc. [mg/L] Recovery[%] RPD!: Ctrl.Limits[%j Flags <br /> j. LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Chromium(Hexavalent) 0.200 0.200 0.200 0.200 100.0 100.0 0.0 80-120 20 <br /> t <br /> i <br /> 1220 Quarry Lane"Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919Facsimile:(925)484-1096 <br /> Printed on:04/24/2001 10:57 Page 4 of 4 <br />