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www.ener&lab.com Helene Mt 877.472-0711 - Billings, MT 800.735-4469 - Casper, WY 888-235-0515 <br />Ans"alfxcatleaceStace 7957 Gillette, WY 866-686-7175 a Rapid City, SD 888-672-1125 o College Station, TX 888-690-2218 <br />-------- . _-_.._........ --- <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program-Discharge <br />Analyte Count Result Units <br />Report Date: 10104/10 <br />Work Order: 010090551 <br />RL %REC Low Limit High Limit RPD RPDLimit Quai <br />Method: A4500-S F Analytical Hun: I I I HA I rvrv_i =1 ran <br />Sample ID: ICV Initial Calibration Verification Standard 09/15/10 09:58 <br />Sulfide 95.6 mg/L 1.0 99 80 120 <br />Method: A4500-S F <br />Sample ID: MBLK7.100915 Method Blank <br />Sulfide ND mg/L <br />Sample ID: C10090551-001IMS Sample Matrix Spike <br />Sulfide 31.2 mg/L <br />Sample ID: C10090551-0011MSD Sample Matrix Spike Duplicate <br />Sulfide 29.6 mg/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />bacri: 1UUV15-5uu-11Jt- i r n-VV <br />Run: TITRATION-100915A 09/15/10 09:55 <br />0.6 <br />Run: TITRATION_100915A 09/15/10 17:08 <br />1.0 107 80 120 <br />Run: TITRATION_100915A 09/15/10 17:11 <br />1.0 102 80 120 5.3 20 <br />ND - Not detected at the reporting limit. <br />Page 9 of 22