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wwwoergylab.eom Hcisn? 1?r_877-472-0711 • Billings, INi800-735-4489 • Casper,WY888-235-0515 <br />AMlrtk+lEYC?EhNCrStxa I9l7 ?yiT=s664*ti175 • Rapid City, SD 888-672-1225 • Collage Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/25/11 <br />Project: Schwartz-GW 03/31/11 S25673 Work order: C11040039 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2540 C Batch: 110404_1_SLDS-TDS-W <br />Sample ID: MBLK1_110404 Method Blank Run: BAL-1 _110404B 04/04/11 13:04 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_110404 Laboratory Control Sample Run: BAL-1 _110404B 04/04/11 13:04 <br />Solids, Total Dissolved TDS @ 180 C 998 mg/L 10 100 90 110 <br />Sample ID: C11040018-003ADUP Sample Duplicate Run: BAL-1 _110404B 04/04/11 13:09 <br />Solids, Total Dissolved TDS @ 180 C 560 mg/L 10 0.6 10 <br />Sample ID: C11040018-008AMS Sample Matrix Spike Run: BAL-1 _110404B 04/04/11 13:10 <br />Solids, Total Dissolved TDS @ 180 C 3330 mg/L 10 102 90 110 <br />Qualifiers; <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 6 of 19 <br />