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www.energylab=m Helena; W 877-472-0711 • Billings, W 000-735-4409 • Casper, WY 800-235-0515 <br />Aul/tlydEYeaAYrrasikca lit ?? ' 'GillettAy 866-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX $88-610-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/14/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10080538 <br />Analyte Count Result Units RL %aREC Low Limit High Limit RPD RPDLimit Qual <br />Method: E300.0 Batch: R136458 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC2-C_100823A 08/23/10 12:10 <br />Chloride 9.54 mg/L 1.0 95 90 110 <br />Sulfate 37.9 mg/L 1.0 95 90 110 <br />Sample ID: MBLK 2 Method Blank Run: IC2-C_100823A 08/23/10 12:24 <br />Chloride ND mg/L 0.2 <br />Sulfate ND mg/L 0.04 <br />Sample ID: C1 0080526-001 AMS 2 Sample Matrix Spike Run: IC2-C_100823A 08/24/10 20:22 <br />Chloride 259 mg/L 2.0 102 80 120 <br />Sulfate 1690 mg/L 8.0 91 80 120 <br />Sample ID: C10080526-001AMSD 2 Sample Matrix Spike Duplicate Run: IC2-C_100823A 08/24/10 20:36 <br />Chloride 259 mg/L 2.0 102 80 120 0.1 20 <br />Sulfate 1680 mg/L 8.0 91 80 120 0.2 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 20 of 31