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QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 10/12/10 <br />Project: Schwartzwalder Mine Work Order: C10090382 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2320 B Batch: R137296 <br />Sample ID: MBLK 2 Method Blank Run: MANTECH 100915A 09/15/1017:01 <br />Alkalinity, Total as CaC03 ND mg/L 1 <br />Bicarbonate as HC03 ND mg/L 1 <br />Sample ID: LCSt Laboratory Control Sample Run: MANTECH_100915A 09/15/1017:17 <br />Alkalinity, Total as CaCO3 212 mg/L 5.0 106 90 110 <br />Sample ID: C10090423-002BDUP 2 Sample Duplicate Run: MANTECH_10091SA 09/15/1019:32 <br />Alkalinity, Total as CaC03 312 mg/L 5.0 0.8 10 <br />Bicarbonate as HCO3 379 mg/L 5.0 0.4 10 <br />Sample ID: C10090423.002BMS Sample Matrix Spike Run: MANTECH 100915A 09/15/1019:41 <br />Alkalinity, Total as CaC03 444 mg/L 5.0 108 80 120 <br />I <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />wow awn sham lieleee, Wr 111472-0111 • Billings, MY 111-131441/ • Casper, WY 111-225- I5 <br />A l dMZinkee Aw rar Gillette, WY 111-011.7175 • Repid Clty, SD 11"72-1228 • Ceilw Stetion, 7X 111.11111-2211 <br />Page 11 of 36