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* SPL BATCH QUALITY CONTROL REPORT ** PAGEHOUSTON LABORATORY <br /> METHOD 8020/602 8880 INTESCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> 0 RHONE(713)660-0401 <br /> Matrix Aqueous Batch Id HP_N960616223200 <br /> Units gg/L <br /> L A B O R A T 0 R X 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 O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> f t Recovery Range <br /> MTBE ND 50 48 96 0 20 - 110 <br /> Benzene ND 50 49 98 0 62 - 121 <br /> Toluene ND 50 48 96 0 66 - 136 <br /> EthylBenzene ND 50 S2 104 70 - 136 <br /> 0 Xylene ND 50 50 100 74 - 134 <br /> M & P Xylene ND 100 100 100 77 - 140 <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 t (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <15 <4> <1> <5> Max Recovery Range <br /> MTBE ND 20 17 a5 0 17 85 0 0 20 39 - 150 <br /> BENZENE ND 20 16 80 0 17 85 0 6 06 25 39 - 150 <br /> OLUENE ND 20 17 85 0 17 85 0 0 26 56 - 134 <br /> ETHYLBENZENE ND 20 17 85 0 1& 90 D 5 71 38 61 - 128 <br /> 0 XYLENE ND 20 17 85 0 17 85 0 0 29 40 - 130 <br /> M & P XYLENE ND 40 36 90 0 36 90 0 0 20 43 - 152 <br /> Analyst VHZ * = values Outside QC Range <br /> Sequence Date 06/16/96 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked 9606156-02A ND Not Detected/Below Detection Limit <br /> Sample File ID N^502 TXO k Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID LCS k Recovery = (<I> / <3> ) x 100 <br /> Blank Spike File ID N_490 TX0 Relative Percent Difference l (<4> - <5> 1 / [(<4> + <5> } x 0 51 x 100 <br /> Matrix Spike File ID N496 TXO I*•) Source SPL-Houston Historical Data (3rd Q '95) <br /> Matrix Spike Duplicate File ID N497 TXO (***) = Source SPL-Houston Historical Data (2nd Q 195) <br /> SAMPLES IN BATCH(SPL ID) 9606629-OSA 9606156-02A 9606156-03A 9606156-01A <br /> 96D6629-03A 9606629-OIA 9606523-01A 9606523-03A <br /> 9605386-02A 9606386-03A <br /> i <br /> QC Of cer <br />