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* PL BATCH QUALITY CONTROL REPORT +' PAGE KDUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> G HOUSTON TEXAS 77054 <br /> ZJW jaz PHONE(713)660 0901 <br /> Matrix Aqueous Batch Id HP_s950702214100 <br /> Units pg/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 IN S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> If 1r Recovery Range <br /> Benzene ND 50 42 84 0 61 - 123 <br /> Toluene ND 50 44 88 0 62 - 122 <br /> EthylBenzene ND 50 48 96 0 56 - 119 <br /> 0 Xylene ND 50 49 98 0 32 - 160 <br /> M & P Xylene ND 100 100 100 32 - 160 <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 /> Benzene ND 50 50 100 50 0 100 0 25 39 - 150 <br /> Toluene ND 150 140 93 3 138 0 92 0 1 40 26 56 - 134 <br /> EthylBenzene ND 50 48 96 0 47 0 94 0 2 11 38 61 - 128 <br /> 0 Xylene ND 100 95 95 0 93 0 93 0 2 13 20 40 - 130 <br /> M & P Xylene ND 100 110 110 104 0 104 5 61 20 43 - 152 <br /> Analyst LPD * = Values Outside QC Range <br /> Sequence Date 07/02/95 NC - Not Calculated {Sample exceeds spike by factor of 4 or morel <br /> SPL ID of sample spiked 9506982-06A ND = Not Detected/Below Detection Limit <br /> Sample File ID SS_134 TXO % Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID LCS % Recovery - (<1> / <3> ) x 100 <br /> Blank Spike File ID SSJ078 TXO Relative Percent Difference (<4> - <5> / [(<4> + <5> ) x 0 51 x 100 <br /> Matrix Spike File ID SS_119 TXO ("+) Source SPL-Houston Historical Data <br /> Matrix Spike Duplicate File ID SS-120 TXO ("') = Source SPL-Houskon Historical Data <br /> I � <br /> I I <br /> , I I <br /> SAMPLES IN BATCH(SPL ID) . 9506982-07A 9506982-01A 9506982-02A 9506982-03A <br /> 9506982-04A 9506982-OSA 9506982-06A 9566982-08A I <br /> 9506945-06A 9506945-05A 9506BI4-17A 9506814-16A i <br /> I ` <br /> 9506314-14A 9506314-18A 9506814-13A 9506814-11A I <br /> Idelis Wil Jams QC Officer E <br /> <IkI I II I ' f l l i <br /> I I IVI ;ii I iV o I t I ' I IEI ��1� II <br />