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¦ www.et erd3b.CM Helena, I f 817472-0711 • Billings, MT 800-7354489 • Casper, WY 888-235-0515 <br />lit J Gillette, WY 866466-7175 ¦ Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/05/10 <br />Project: Schwartzwalder Water Monitoring Program Discharge Work Order: 010100100 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual? <br />Method: A4500-F C Batch: R138099 <br />Sample ID: MBLK Method Blank Run: MANTECH_101005B 10/05/10 08:08 <br />Fluoride ND mg/L 0.05 <br />Sample ID: LCS Laboratory Control Sample Run: MANTECH_101005B 10/05/10 08:11 <br />Fluoride 1.00 mg/L 0.10 100 90 110 <br />Sample ID: 010100083-024AMS Sample Matrix Spike Run: MANTECH_101005B 10/05/10 10:30 <br />Fluoride 1.00 mg/L 0.10 100 80 120 <br />Sample ID: C10100083-024AMSD Sample Matrix Spike Duplicate Run: MANTECH_101005B 10/05/10 10:32 <br />Fluoride 1.00 mg/L 0.10 100 80 120 0 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 8 of 22