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www~abarn Helena, MT 877472-0711 • Billings, MT 860-735-4489 • Casper, WY 888-235-0515 <br />AUWMfuahac Mks IZ2 Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 08/15/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10070865 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: A2320 B Batch: R135455 <br />Sample ID: MBLK 2 Method Blank Run: MANTECH_100728A 07/28/10 13:20 <br />Alkalinity, Total as CaC03 ND mg/L 1 <br />Bicarbonate as HC03 ND mg/L 1 <br />Sample ID: LCS1 Laboratory Control Sample Run: MANTECH_100728A 07/28/10 13:36 <br />Alkalinity, Total as CaC03 206 mg/L 5.0 103 90 110 <br />Sample ID: C1 0070865-001 FDUP 2 Sample Duplicate Run: MANTECH_100728A 07/28/10 15:43 <br />Alkalinity, Total as CaC03 425 mg/L 5.0 0.2 10 <br />Bicarbonate as HC03 518 mg/L 5.0 0.2 10 <br />Sample ID: C10070865-001 FMS Sample Matrix Spike Run: MANTECH_100728A 07/28/10 15:51 <br />Alkalinity, Total as CaC03 554 mg/L 5.0 102 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. ND Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 5 of 25