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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: Dissolved Organic Carbon(NPOC) WorkOrder: 10030200 <br /> Method: SM5310 B Lab Batch ID: R297316 <br /> Method Blank Samples in Analytical Batch: <br /> RunID: TOC2_100309A-5423085 Units: mg/L Lab Sample ID Client Sample ID <br /> Analysis Date: 03/09/2010 9:00 Analyst: ESK 10030200-01 E MW-2 <br /> 10030200-03D MW-5 <br /> 10030200-04D MW-6R <br /> Analyte Result Qual Rep Limit l� MDL 10030200-05E MW-7 <br /> 1Or�anic Carbon,Dissolved ND� 1 Lot 0.509] <br /> Laboratory Control Sample(LCS) <br /> RunID: TOC2_100309A-5423086 Units: mg/L <br /> Analysis Date: 03/09/2010 9:00 Analyst: ESK <br /> Analyte Spike , Result Percent Qua] Lower Upper <br /> Added I Recovery Limit Limit <br /> Frganic Carbon, Dissolved 4.000 3.819 95.48 84 116 <br /> Matrix Spike(MS)1 Matrix Spike Duplicate(MSD) <br /> Sample Spiked: 10030118-01 <br /> RunID: TOC2_100309A-5423094 Units: mg/L <br /> Analysis Date: 03/09/2010 9:00 Analyst: ESK <br /> Analyte Sample�SmpT MS MS MS% MS MSD MSD MSD% MSD RPD RPD RPD low High <br /> Result Qual Spike Result Rcvry Qual Spike Result Rcvry Qual Qual Limit(Limit Limit <br /> Added Added <br /> Organic Carbon, Dissolved I 5 834 f 2.497 83.15 2 7.512 83.90 0 20 73 125 <br /> - - - t - f _� _T-_ <br /> Qualifiers: ND/U-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 4/9/2010 2:31:16 PM <br /> calculated by the SPL LIMS system are derived from QC data prior to the application of rounding rules. <br />