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wwwxer#ab.com 6`<`'r Helena, MT577-472-0711• Billings, INT600-735-4489• Casper, WY $88-235-0515 <br />Awbtli*ftal lwaSim 18it ,? . t?14 GillP r Hy 166-666-7175 • Rapid City, So 886-672-1225 • College Station. YX 888-680-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Analyte Count Result Units <br />Method: E300.0 <br />Sample ID: LCS 2 Laboratory Control Sample <br />Chloride 9.47 mg/L <br />Sulfate 37.9 mg/L <br />Sample ID: Mll 2 Method Blank <br />Chloride ND mg/L <br />Sulfate ND mg/L <br />Sample ID: C10080790-008BMS 2 Sample Matrix Spike <br />Chloride 60.7 mg/L <br />Sulfate 190 mg/L <br />Sample ID: C10080790-008BMSD 2 Sample Matrix Spike Duplicate <br />Chloride 60.2 mg/L <br />Sulfate 189 mg/L <br />Report Date: 09/16/10 <br />Work Order: C10080790 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R136695 <br />Run: IC2-C_100830A 08/30/10 23:36 <br />1.0 95 90 110 <br />1.0 95 90 110 <br />Run: IC2-C 100830A 08/30/10 23:50 <br />0.2 <br />0.04 <br /> Run: IC2-C_100830A 08/31/10 11:51 <br />1.0 100 80 120 <br />1.6 103 80 120 <br /> Run: IC2-C_100830A 08/31/10 12:06 <br />1.0 97 80 120 0.8 20 <br />1.6 101 80 120 0.4 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 22 of 37