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www.efwdab.com ( Helena, MR 817472 -0711 • Billings, MT 801 -735 -4489 • Casper, WY 888 -235 -0515 <br />1EmbwoA'rm J Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College station, TX 888 - 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />02/17/15 <br />Project: Schwartz - GW 1/28/15 S28066, S28069, S28071 <br />Work Order: <br />C15010751 <br />Analyte Count Result Units <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: E353.2 <br />Batch: R195707 <br />Lab ID: MBLK -1 Method Blank <br />Run: TECHNICON_150130A <br />01/30/15 12:12 <br />Nitrogen, Nitrate +Nitrite as N ND mg /L <br />0.01 <br />Lab ID: LFB -3 Laboratory Fortified Blank <br />Run: TECHNICON_150130A <br />01/30/15 12:17 <br />Nitrogen, Nitrate +Nitrite as N 2.04 mg /L <br />0.10 <br />104 90 110 <br />Lab ID: C15010734- 001BMS Sample Matrix Spike <br />Run: TECHNICON_150130A <br />01/30/15 12:22 <br />Nitrogen, Nitrate +Nitrite as N 7.65 mg /L <br />0.20 <br />87 90 110 <br />S <br />- Matrix spike recoveries outside the acceptance range are considered matrix - related. <br />Lab ID: C15010734- 001BMSD Sample Matrix Spike Duplicate <br />Run: TECHNICON_150130A <br />01/30/15 12:25 <br />Nitrogen, Nitrate +Nitrite as N 7.65 mg /L <br />0.20 <br />87 90 110 0.0 <br />10 S <br />- Matrix spike recoveries outside the acceptance range are considered matrix - related. <br />Lab ID: C15010769- 004EMS Sample Matrix Spike <br />Run: TECHNICON_150130A <br />01/30/15 13:00 <br />Nitrogen, Nitrate +Nitrite as N 2.01 mg /L <br />0.10 <br />103 90 110 <br />Lab ID: 015010769- 004EMSD Sample Matrix Spike Duplicate <br />Run: TECHNICON_150130A <br />01/30/15 13:02 <br />Nitrogen, Nitrate +Nitrite as N 2.05 mg /L <br />0.10 <br />105 90 110 2.0 <br />10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration S - Spike recovery outside of advisory limits. <br />Page 13 of 23 <br />