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www.en m4ob.com ( Helena, MT 677472-0711 - Billings, MT 800-7354489 - Casper, WY 888-235-0515 <br />• t AUWWEreaM =A= lW J Gillette, WY 888-888-7175 • Rapid City, SD 888-672-1225 - College Station, TX 888-698-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/22/10 <br />Project: Schwartzwalder Water Monitoring Program SW Work Order: C10100592 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: R138746A <br />Sample ID: C10100697-010BMS4 4 Sample Matrix Spike Run: ICPMS4-C_101019A 10/20/10 01:30 <br />Copper 0.0513 mg/L 0.010 102 70 130 <br />Iron 1.38 mg/L 0.030 99 70 130 <br />Silver 0.0188 mg/L 0.010 94 70 130 <br />Zinc 0.0524 mg/L 0.010 101 70 130 <br />Sample ID: C10100697-010BMSD 4 Sample Matrix Spike Duplicate Run: ICPMS4-C_101019A 10/20/10 01:37 <br />Copper 0.0513 mg/L 0.010 102 70 130 0.1 20 <br />Iron 1.42 mg/L 0.030 102 70 130 3.1 20 <br />Silver 0.0190 mg/L 0.010 95 70 130 1.0 20 <br />Zinc 0.0533 mg/L 0.010 103 70 130 1.8 20 <br />Sample ID: LRB 4 Method Blank Run: ICPMS4-C_101019A 10/19/10 13:21 <br />Copper ND mg/L 6E-05 <br />Iron ND mg/L 0.0001 <br />Silver ND mg/L 8E-05 <br />Zinc 0.0002 mg/L 0.0001 <br />Sample ID: LFB 4 Laboratory Fortified Blank Run: ICPMS4-C_101019A 10/19/10 13:28 <br />Copper 0.0557 mg/L 0.0010 111 85 115 <br />Iron 1.29 mg/L 0.012 104 85 115 <br />Silver 0.0218 mg/L 0.0010 109 85 115 <br />Zinc 0.0568 mg/L 0.0010 113 85 115 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 21 of 36