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www.enorgyla1.com Helena, W 617472-0711 • Billings, W 808-7354489 • Casper, WY 888-235-Ml5 <br />Aub"EwEbmsEne.IMt Gillette, WY 866-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888498-2218 <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-S F Analytical Run: TITRATION_101004A <br />Sample ID: ICV Initial Calibration Verification Standard 10/04/10 12:05 <br />Sulfide 116 mg/L 1.0 101 80 120 <br />Method: A4500-S F Batch: 101004-SULFIDE-TTR-W <br />Sample ID: MBLK7-101004 Method Blank Run: TITRATION_101004A 10/04/10 12:02 <br />Sulfide ND mg/L 0.6 <br />Sample ID: C10100069-001AMS Sample Matrix Spike Run: TITRATION-101004A 10/04/10 13:50 <br />Sulfide 23.8 mg/L 1.0 104 80 120 <br />Sample ID: C10100069-001AMSD Sample Matrix Spike Duplicate Run: TITRATION_101004A 10/04/10 13:53 <br />Sulfide 24.2 mg/L 1.0 105 80 120 1.3 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 9 of 22