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wrrw.ene dab=m <br />AaaWWEaa9M0 Mb=1 <br />H>Iena, MT B77-472-0711 • Billings, MT 600-735-4489 • Casper, WY 888-235-0515 <br />,Glilette, WY 866-686-7175 a Rapid city, SD 886-672-1225 a College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/16/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10080790 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 Batch: R136527 <br />Sample ID: C10080824-002CMSD 12 Sample Matrix Spike Duplicate Run: ICP2-C_100826A 08/26/10 15:49 <br />Calcium 100 mg/L 0.50 99 70 130 1 20 <br />Chromium 2.0 mg/L 0.050 96 70 130 0.8 20 <br />Copper 1.9 mg/L 0.010 95 70 130 0.6 20 <br />Iron 2.0 mg/L 0.030 98 70 130 0.6 20 <br />Magnesium 100 mg/L 0.50 100 70 130 3.2 20 <br />Manganese 1.9 mg/L 0.010 94 70 130 0.4 20 <br />Potassium 95 mg/L 0.50 93 70 130 0 20 <br />Sodium 210 mg/L 0.58 102 70 130 0.8 20 <br />Zinc 2.0 mg/L 0.010 97 70 130 0.9 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 18 of 37