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* SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> O HOUSTON TEXAS 77054 <br /> Atrix Aquenus Batch Id HP 5991021024400 PHONE (713) 660-0901 <br /> Units ug/L <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(**S <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> V Recovery Range <br /> MTBE ND 50 55 110 72 128 <br /> Benzene ND 50 53 106 61 - 119 <br /> Toluene ND 50 53 106 65 - 125 <br /> EthylBenzene ND 50 52 104 70 118 <br /> 0 Xylene ND 50 53 106 72 - 117 <br /> M & P Xylene ND 100 100 1.00 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 /> MTBE ND 20 24 120 25 125 4 08 20 39 - 150 <br /> BENZENE ND 20 21 105 21 105 0 21 32 - 164 <br /> TOLUENE ND 20 21 105 21 105 0 20 38 - 159 <br /> THYLBPNZENE ND 20 19 95 0 20 100 5 13 19 52 - 142 <br /> O XYLENE ND 20 21 105 21 105 0 18 53 - 143 <br /> M & P XYLENE ND 40 36 90 0 36 90 0 D 17 S3 - a44 <br /> * - Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst LJ a - Data outside Method Specification limits <br /> Sequence Date 10/21/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of Sample spiked 99100220-09 ND - Not Detected/Below Detection Limit <br /> Sample File ID S_J3720 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_J3112 TXO Relative Percent Difference t E (<4> - <5> I / [(<4> + <5> ) x 0 5) x 100 <br /> Matrix Spike File ID S J3114 TX0 I**) = Source SPL-Houston Historical Data (1st 0 197( <br /> Matrix Spike Duplicate File ID S J3115 TXO (***) = Source SPL-Houstan Historical Data (Ist Q 197) <br /> SAMPLES IN BATCH(SPL ID) 9910409-04A 9910409-05A 9910539-OIA 9910409-OIA <br /> 9910409-02A 9910409-03A <br />