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www.emdob.com Helena, MT 877472-0711 • Billings, MT 800-7354489 • Casper, WY 888-235-6515 <br />AasfjSatfi?aWaaShri IM Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program SW <br />Report Date: 11 /22/10 <br />Work Order: C10100592 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E300.0 Batch: R139122 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC1-C_101026A 10/26/10 18:14 <br />Chloride 9.24 mg/L 1.0 92 90 110 <br />Sulfate 37.6 mg/L 1.0 94 90 110 <br />Sample ID: MBLK 2 Method Blank Run: ICI-C_101026A 10/26/10 18:32 <br />Chloride ND mg/L 0.01 <br />Sulfate ND mg/L 0.06 <br />Sample ID: C10100594-002AMS 2 Sample Matrix Spike Run: IC1-C_101026A 10/26/10 20:34 <br />Chloride 36.2 mg/L 1.0 111 80 120 <br />Sulfate 219 mo/L 1.6 101 80 120 <br />Sample ID: C10100594-002AMSD 2 Sample Matrix Spike Duplicate Run: IC1-C_101026A 10/26/10 20:51 <br />Chloride 37.5 mg/L 1.0 118 80 120 3.6 20 <br />Sulfate 225 mg/L 1.6 108 80 120 2.4 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 24 of 36