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' ENERGY LABORATOR/ES, /NC. • 2393 Sa/1 Creek Highway (82601) • PO Box325B • Casper, INYB2602 <br />To.!lFree8B823505>5 • 3022350515 • Fax30Z2341639 • caspei~energylab.com•mnvenergy/ab.com <br />. <. <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 04/07/05 <br />Project: M-1978-116 SM-18 Mine Work Order: 005030810 <br />Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A3500-Cr B Batch: A2005-04-OS 6 CR 01 <br />Sample ID: MBLK-2 Method Blank 04/05/05 09:05 <br />Chromium, Hezavalent ND mg/L 0 <br />Sample ID: MBLKSMS Matrix Spike 04/05/05 09:07 <br />Chromium, Hexavalent 0.0942 mg/L 0.010 96.1 80 t20 <br />Sample ID: MBLK-S-DMSD Matrix Spike Duplicate 04/05/05 09:07 <br />Chromium, Hexavalent 0.0942 mg/L 0.010 96.1 80 120 <br />Method: A4500-F C Batch: 050331 1 F-ISE-W <br />Sample ID: MBLK1 _050331 _1 Method Blank 03/31/0513:40 <br />Fluoride ND mg/L 0.02 <br />Sample ID: 005031022-001EMS Matrix Spike 03/31/05 14:42 <br />Fluoride 2.30 mg/L 0.10 110 90 t 10 <br />Sample ID: 005031022-001EMSD Matrix Spike Duplicate 03/31/05 14:45 <br />Fluoride 2.30 mg/L 0.10 110 90 110 0 10 <br />Method: A4500-N02 6 Batch: A2005-04-01 6 N02 01 <br />Sample ID: MBLK-1 Method Blank 04/01/05 08:18 <br />Nitrogen, Nitrite as N ND mg/L 0.003 <br />Sample ID: 005031178-003BM5 Matrix Spike 04/01/05 08:19 <br />Nitrogen, Nitrite as N 0.0497 mg/L 0.10 104 80 120 <br />Sample ID: 005031178-003BMSD Matrix Spike Duplicate 04/01/05 08:19 <br />Nitrogen, Nitrite as N 0.0492 mglL 0.10 103 80 120 0 10 <br />QualiOers: <br />RL -Analyte reporting limit. <br />ND -Not detected at the reporting limit. <br />TraCK# 005030810 Page <br />