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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® HOUSTON,TX 77054 <br /> Quality Control Report (713)660-0901 <br /> ATC Associates, Inc. <br /> 090.38083.0060/Crop Production Services <br /> Analysis: Ammonia(as Nitrogen) WorkOrder: 10030200 <br /> Method: SM4500-NH3 C Lab Batch ID: R297360 <br /> Method Blank Samples in Analytical Batch: <br /> RunID: WET_100309K-5423806 Units: mg/L Lab Sample ID Client Sample ID <br /> Analysis Date: 03/09/2010 11:00 Analyst: M_K 10030200-01A MW-2 <br /> 10030200-02A MW-3 <br /> 10030200-03A MW-5 <br /> - T <br /> -i 10030200-04A MW-6R <br /> Analyte Result I Qual Rep Limit- MDL <br /> d-- 10030200-05A MW-7 <br /> Ammonia(as Nitrogen)_ NDI 1 Ol_ 0.333 <br /> Laboratory Control Sample(LCS) <br /> RunID: WET_100309K-5423808 Units: mg/L <br /> Analysis Date: 03/09/2010 11:00 Analyst: M_K <br /> Analyte Spike Result Percent Qual Lower Upper ` <br /> Added ( Recovery Limit Limit <br /> !Ammonia(as Nitrogen) 7.000 6.860 98.00 91 113 <br /> Matrix Spike(MS)/Matrix Spike Duplicate(MSD) <br /> Sample Spiked: 10031500-01 <br /> RunID: WET_100309K-5423811 Units: mg/L <br /> Analysis Date: 03/09/2010 11:00 Analyst: M_K <br /> Analyte Sample Smp MS MS MS% TMS MSD MSD MSD% MSDTRPD RPD RPD Low High <br /> Result �Qual Spike Result Rcvry Qual Spike Result Rcvry�Qual ' Qual Limit Limit Limit <br /> Ammonia(as Nitrogen) 1 26 01 l <br /> Added 020.16 94.50 �dd 20 20.02 93.80 0.6969 20 <br /> — - — - — — 82_ 119 <br /> Qualifiers: ND/Ll-Not Detected at the Reporting Limit MI-Matrix Interference <br /> E-Estimated Value exceeds calibration curve D-Recovery Unreportable due to Dilution <br /> J-Estimated value between MDL and PQL -Recovery Outside Advisable QC Limits <br /> B-Analyte Detected In The Associated Method Blank <br /> N/C-Not Calculated-Sample concentration is greater than 4 times the amount of spike added.Control limits do not apply. <br /> TNTC-Too numerous to count <br /> QC results presented on the QC Summary Report have been rounded. RPD and percent recovery values 4/9/20102:31:16 PM <br /> calculated by the SPL LIMS system are derived from QC data prior to the application of rounding rules. <br />