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* sPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 8860 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> n PHONE(713)660-0901 <br /> Matrix: Aqueous Batch Id: HP_5990107104410 <br /> Unita: ug/L <br /> L A B O R A T O R Y C 0 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 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> % 1: Recovery Range <br /> MTBE ND 100 82 82.0 72 - 128 <br /> Benzene ND 100 81 81.0 61 - 119 <br /> Toluene ND 100 82 82.0 65 - 125 <br /> EthylBenzene ND 100 81 81.0 70 - 118 <br /> 0 Xylene ND 100 82 82,0 72 - 117 <br /> M & P Xylene ND 200 160 80.0 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 % (Advisor) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE ND 50 56 112 40 80.0 33.3 • 20 39 - 150 <br /> BENZENE ND 50 55 110 55 110 0 21 32 - 164 <br /> TOLUENE ND 50 56 112 54 108 3.64 20 36 - 159 <br /> ETHYLBENZENE ND 50 55 110 54 108 1.83 19 52 - 142 <br /> 0 XYLENE ND 50 54 108 53 106 1.87 18 53 - 143 <br /> M & P XYLENE ND 100 110 110 110 110 0 17 53 - 144 <br /> = Values outside QC Range due to Matrix interference (except RPD) <br /> Analyst: CS r Data outside Method Specification limits. <br /> Sequence Date: 01/08/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9901090-04A ND = Not Detected/Below Detection Limit <br /> Sample File ID: S_A1128.TX0 % Recovery = [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS % Recovery = (<l> / <3> j x 100 <br /> Blank Spike File ID: 5 A1152=0 Relative Percent Difference = 1 (<4> - c5> I / [(<4> + <5> } x 0.51 x 100 <br /> Matrix Spike File ID: S_A1123.TX0 I*`} = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: S A1124.TX0 (•**) Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID) 9901059-07A 9901061-OIA 9901061-02A 9901059-06A <br />