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www.awdab.com <br />AVOW U rlsm Ow INZ <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/17/10 <br />Project: Schwartzwalder Water Monitoring Program-Discharge Work Order: C10110468 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E300.0 Batch: R139886 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC2-C_101112A 11/12/10 20:53 <br />Chloride 9.23 mg/L 1.0 92 90 110 <br />Sulfate 37.3 mg/L 1.0 93 90 110 <br />Sample ID: MBLK 2 Method Blank Run: IC2-C_101112A 11/12/10 21:09 <br />Chloride ND mg/L 0.06 <br />Sulfate ND mg/L 0.2 <br />Sample ID: C10110470-002AMS 2 Sample Matrix Spike Run: IC2-C_101112A 11/13/10 23:52 <br />Chloride 27.0 mg/L 1.0 101 80 120 <br />Sulfate 218 mg/L 1.6 100 80 120 <br />Sample ID: C10110470-002AMSD 2 Sample Matrix Spike Duplicate Run: IC2-C_101112A 11/14/10 00:08 <br />Chloride 27.1 mg/L 1.0 101 80 120 0.3 10 <br />Sulfate 216 mg/L 1.6 97 80 120 0.9 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 16 of 23 <br />• Billings, W 800-7354419 • Gasper, WY 888-235-0515 <br />ity, SD 888-672-1225 • Collage Sfet on,111888=690-2218 <br />