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www.energylab.com ( Helena, W 877.472-0711 a Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />Anal icst Fxceltence Stace 1952 Gillette, WY 866-686-7175 d Rapid City, SO 888-672-1225 • College Station, A 888-890-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/14/10 <br />Work Order: C10080305 <br />C <br />A <br />l R <br />l <br />it <br />U RL %REC L <br />Li <br />it Hi <br />i <br />h Li RPD RPDLi <br />l <br />i <br />C <br />ount <br />esu <br />n <br />na <br />yte <br />t <br />s ow <br />m g <br />m <br />t m <br />ua <br />t <br />Method: A2540 C Batch: 100810 1 SLDS-TDS-W <br />Sample ID: MBLK1_100810 Method Blank Run: BAL-1 _100810B 08/10/10 16:37 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_100810 Laboratory Control Sample Run: BAL-1 _100810B 08/10/10 16:38 <br />Solids, Total Dissolved TDS @ 180 C 984 mg/L 10 98 90 110 <br />Sample ID: C10080305-001AMS Sample Matrix Spike Run: BAL-1 _100810B 08/10/10 16:45 <br />Solids, Total Dissolved TDS @ 180 C 3170 mg/L 10 100 90 110 <br />Sample ID: C10080305-001AMSD Sample Matrix Spike Duplicate Run: BAL-1 _100810B 08/10/10 16:46 <br />Solids, Total Dissolved TDS @ 180 C 3160 mg/L 10 101 90 110 0.5 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 5 of 21