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SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020/602 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> n <br /> Matrix Aqueous Batch Id HP_U971022190700 PHONE (713)660-0901 <br /> Units Mg/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 <br /> _ QC Limits(**) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatary) <br /> <2> 1; } Recovery Range <br /> MTBE ND 50 51 102 72 - 128 <br /> Benzene ND 50 53 106 61 - 119 <br /> Toluene ND 50 54 108 55 - 125 <br /> £thylBenzene ND 50 52 104 70 - 118 <br /> O Xylene ND 50 52 104 72 - 117 <br /> M & 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 Llmlts(***) <br /> C O M P O U N D S Results Added Duplicate Relative I _{Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> 1 <3> <1> <4> <1> <5> Max Recovery Range <br /> MTBE 920 20 880 NC 880 NC NC 20 39 - 150 <br /> BENZENE ND 20 16 90 0 19 95 0 5 41 21 32 - 164 <br /> TOLUENE ND 20 18 90 0 18 90 0 0 20 38 - 159 <br /> HYLBENZENE ND 20 17 85 0 17 BS 0 0 19 52 - 142 <br /> O XYLENE ND 20 17 85 0 16 60 0 6 06 18 53 _ 143 <br /> M & P XYLENE ND 40 33 82 5 32 80 0 3 08 17 53 - 144 <br /> Analyst MF * = Values Outside QC Range r = Data outsiae Method Specification limits <br /> Sequence Date 10/22/97 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked 9710855-OIA ND = Not Detected/Below Detection Limit <br /> Sample File ID U_J7880 TXO % Recovery = [( <1> - <2> ) / <3> 1 x 100 <br /> Method Blank File ID LCS % Recovery = (<1> / <3> ] x 100 <br /> Blank Spike File ID U_J7876 TXO Relative Percent Difference f (<4> - <5> / [(<4> + <5> ) x 0 51 x 100 <br /> Matrix Spike File ID U_J7877 TXO (**) = Source SPL-Houston Historical Data (Ist Q 197) <br /> Matrix Spike Duplicate File ID U J7878 TXO (***y = Source SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID) 9710855-06A 9710877-04A 9710877-02A 9710877-03A <br /> 9710855-03A 9710855-07A 9710805-1OA 9710805-11A <br /> 9710833-OIA 9710833-02A 9710855-01A 9720855-02A <br /> 9710855-OSA 9710855-OIA 9710855-02A 9710855-04A <br /> 9710855-05A <br />