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SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020— as8O INTERCHANGE DRIVE <br /> O HOUSTON,TEXAS 77054 <br /> A <br /> Aqueous Batch Id: HP 5980122074700 PHONE (713)660-0901 <br /> Units= Ag/L <br /> L A B O R A T O R Y C O N T R O L S A M P L E <br /> S P I K E Method Spike Blank Spike QC Limits(**) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatary) <br /> <2> <3> <1> W % Recovery Range <br /> MTBE ND 50 48 96.0 72 - 128 <br /> Benzene ND 50 51 102 61 - 119 <br /> Toluene ND 50 So 100 65 - 125 <br /> Ethyl_Benzene ND 50 49 98.0 70 - 118 <br /> O-Xylene ND 50 5I 102 72 - 117 <br /> M and P Xylene ND 100 100 100 72 - 116 <br /> M A T R I X S P I K E S <br /> S P I K E Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limits{***) <br /> C O M P O U N D S Results Added Duplicate Relative % (Advisory} <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max- Recovery Range <br /> MTBE1200 1000 2300 110 2400 120 8.70 20 39 - 150 <br /> BENZENE ND 1000 970 97.0 950 95.0 2-08 21 32 - 164 <br /> '�'QLUENE ND 1000 940 94.0 910 91.0 3.24 20 38 - 159 <br /> ,EYL BENZENE ND 1000 860 86.0 840 84.0 2.35 19 52 - 142 <br /> O-XYLENE ND 1000 1000 100 960 96.0 4.08 18 53 - 143 <br /> M AND P XYLENE ND 2000 1800 90.0 1700 85.0 5.71 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: DN c = Data outside Method Specification limits. <br /> Sequence Date: 01/22/9B NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9801744-03A ND = Not Detected/Below Detection Limit <br /> Sample File ID: S A3089.TXO % Recovery = [( <1> - <2> ) / <3> 1 x 100 <br /> Method Blank File ID: _ LCS % Recovery - (<1> / <3> ) x 100 <br /> Blank Spike File ID: S A3081.TX0 Relative Percent Difference = 1 (<4> - <5> ! / [(<4> + <5> ) x 0.51 x 100 <br /> Matrix Spike File ID: S A3084•TX0 (+'*) = Source: SPL-Houston Historical Data (1ST Q 197) <br /> Matrix Spike Duplicate File ID: S_A3085.TXo {***} Source: SPL-Houston Historical Data (1ST Q 197) <br /> SAMPLES IN BATCH(SPL ID) : 9801744-02A 9801583-01A 9801743-01A 9B01743-02A <br /> 9801743-03A 9801583-08A 9801744-05A 9801743-OSA <br /> 9801685-03A 9801685-04A 9801685-02A 9801743-01A <br /> 9801744-03A 9801580-04A 9801580-OSA <br /> l <br />