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SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> 0 HOUSTON. TEXAS 77054 <br /> ,lie a0z PHONE (713)660.0901 <br /> Matrix; Aqueous Batch Id: VARE990330043300 <br /> Units; ug/L <br /> - 1 <br /> L A B O R A T O R Y C 0 N T R 0 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> t % Recovery Range <br /> MTBE ND 50 52 104 72 - 128 <br /> Benzene ND 50 47 94.0 61 - 119 <br /> Toluene ND 5o 47 94.0 65 - 125 <br /> EthylBenzene ND 50 98 96.0 70 - 118 <br /> O Xylene ND So 47 94.D 72 - 117 <br /> M & P Xylene ND 100 92 92.0 72 - 116 <br /> M A T R I X S P I K E S <br /> 5 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> cl> <4> <1> <5> Max- Recovery Range <br /> MTBE 11 20 37 130 37 130 0 20 39 - 150 <br /> BENZENE ND 20 19 95.0 18 90.0 3.41 21 32 - 164 <br /> TOLUENE ND 20 18 90.0 17 8S.0 5.71 20 38 - 159 <br /> ETHYLBENZENE ND 20 19 90.0 18 90.0 0 19 52 - 142 <br /> 0 XYLENEND 20 19 95.0 19 95.0 0 16 53 - 143 <br /> F :.7 <br /> M & P XYLENE ND 40 36 90.0 35 87.5 2.82 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst- LJ a = Data outside Method Specification limits. <br /> Sequence Date: 03/30/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or morel <br /> SPL ID of sample spiked. 9903A56-09A ND Not Detected/Below Detection Limit <br /> Sample File ID: E_C5046.TX0 % Recovery - [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID; LCS % Recovery = (<1> / 43> 1 x 100 <br /> Blank Spike File ID: E_C5039.TXo Relative Percent Difference = I (<4> - <5> I / {(<4> + <5> ] x 0.5] x 100 <br /> Matrix Spike File ID: E_C5041.TXO (**} Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: E_C5042.TXO I*•*} = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL IDI : 9903C38-01A 9903B99-06A 990IB99-OBA 9923B99-09A <br /> 9903A56-10A 9903A56-11A 9903A56-12A 9903A56-13A <br /> 9903A56-14A 9903AS6-16A 9903AS6-17A 9903AS6-09A <br /> 9903A56-15A 9903C21-01A 9903C38-02A <br /> a <br /> r <br /> i <br />