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• SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> _ Batch Id: VARD980714190200 <br /> PHONE(713) 660-0901 <br /> Units: ug/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 0 M P O U N D S Blank Result Added Result Recovery ;Mandatory) <br /> <2> <3> <1> 1 Recovery Range <br /> MTEE ND 50 39 78.0 72 - 1.28 <br /> Benzene ND 50 47 94.0 61 - 119 <br /> Toluene ND 50 5o 100 65 - 125 <br /> EthylBenzene ND 50 48 96.0 70 118 <br /> 0 Xylene ND 50 47 94.0 72 - 117 <br /> M & P Xylene ND 100 95 95.0 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 4 (Advisory). <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE ND 20 20 100 20 100 0 20 39 - 150 <br /> BENZENE ND 20 19 95.0 21 105 10.0 21 32 - 164 <br />. TOLUENE ND 20 20 100 22 110 9.52 20 38 - 159 <br /> ETHYLBENZENE ND 20 19 95.0 21 105 10.0 19 52 - 142 <br /> O XYLENE ND 20 19 95.0 21 105 10.0 18 53 - 143 <br /> M & P XYLENE ND 40 38 95.0 42 105 10.0 17 53 - 144 <br /> * Values outside QC Range due to Matrix Interference (except RPDI <br /> Analyst: LJ/ a = Data outside Method Specification limits. <br /> Sequence Date: 07/14/98 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9807160-05A ND = Not Detected/Below Detection Limit <br /> Sample File ID: D G2048.TX0 % Recovery - [( <1> - <2> ) / <3> 1 x 100 <br /> Method Blank File ID: LCS % Recovery = (<1> / <3> Y x 100 <br /> Blank Spike File ID: D_G204I.TX0 Relative Percent Difference = 1 (<4> - <5> / [(<4> + <5> ) x 0.51 x 100 <br /> Matrix Spike File ID: D G2043.TX0 f* ) = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: D_G2044.TX0 [***Y = Source: SPL-Houston Historical Data (Ist Q '97} <br /> SAMPLES IN BATCH(SPL ID) : 9807150-01A 9807160-02A 9807160-03A 9807160-07A <br /> 9807160-09A 9807160-08A 9807329-OIA 9807160-04A <br /> 9807294-09A 9807329-02A 9807329-03A 9807160-05A <br /> 9807160-06A 9807294-08A 9807221-03A <br />