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?y %Y w.energylab.corn Helena, MT 811-472-0711 • Billings, Mr 800-135-4489 = Casper WY 868-235-0515 <br />anerrrloelrxeaUenceStacs 1952 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 0 College Station, TX 888-890-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Sampling Program-Ground Water <br />Analyle Count Result Units <br />Method: A2540 C <br />Sample ID: MBLK1_101228 Method Blank <br />Solids, Total Dissolved TDS @ 180 C ND mg/L <br />Sample ID: LCS1_101228 Laboratory Control Sample <br />Solids, Total Dissolved TDS @ 180 C 1010 mg/L <br />Sample ID. C10120819-002AMS Sample Matrix Spike <br />Solids, Total Dissolved TDS @ 180 C 2810 mg/L <br />Sample ID: C10120819.002AMSD Sample Matrix Spike Duplicate <br />Solids, Total Dissolved TDS @ 180 C 2720 mg/L <br />Report Date: 01/21/11 <br />Work Order: 010120619 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Balch: 101228 1 SLDS-TDS-W <br />Run: BAL-1 101228A 12/28/10 12:32 <br />10 <br />Run: BAL-1_101228A 12/28/10 12:33 <br />10 101 90 110 <br />Run: BAL-1 101228A 12/28/10 12:38 <br />10 98 90 110 <br />Run: BAL-1 101228A 12/28/10 12:38 <br />10 94 90 110 3.3 10 <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum delectable concentration <br />ND - Not detected at the reporting limit. <br />Page 8 of 25