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* $PL BATCH QUALITY I,ONTROL REPORT *» PAGE HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> ® HOUSTON TEXAS 77054 AW <br /> PHONE(713)660 0901 <br /> • Matrix Aqueous Batch Id HP_U950909122800 <br /> Units Kg/L <br /> L A B 0 R A T 0 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 O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> E % Recovery Range <br /> Benzene ND 50 57 114 61 - 123 <br /> Toluene ND 50 57 114 62 - 122 <br /> EthylBenzene ND 50 54 108 56 - 119 <br /> 0 Xylene ND 50 51 102 32 - 160 <br /> M & P Xylene ND 100 110 110 32 - 160 <br /> M A T R I X S PIKE S <br /> S P I K E Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limlts(***) <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 I Recovery Range <br /> BENZENE 1 20 24 115 23 110 4 44 25 39 - 150 <br /> TOLUENE 2 20 22 100 25 115 14 0 26 56 - 134 <br /> ETHYLBENZENE ND 20 23 115 23 115 0 38 61 128 <br /> O XYLENE 3 20 23 100 23 100 0 20 40 - 130 <br /> & P XYLENE 3 40 49 115 46 108 6 28 20 43 - 152 <br /> Analyst DAO = Values Outside QC Range <br /> Sequence Date 09/09/95 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked 9509260-OIA ND = Not Detected/Below Detection Limit <br /> Sample File ID U_066 TXO %, Recovery = [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID LCS I Recovery - (<1> / <3> } x 100 <br /> Blank Spike File ID U057 TXO Relative Percent Difference (<4> - <5> / [(<4> + <5> } x 0 5] x 100 <br /> Matrix Spike File ID U058 TXO (**) Source <br /> Matrix Spike Duplicate File ID U059 TXO (***) Source SPL-Houston Historical Data <br /> SAMPLES IN BATCH(SPL ID) 9509263-12A 9509260-DIA 9509260-03A 9509257-OIA <br /> 9509263-03A 9509263-06A 9509271-OIA 9509263-07A <br /> 9509266-03A 9509271-03A 9509271-04A 9509266-01A <br /> 9509263--02A 9509263-04A 9509266-04A 9509265-25A <br /> 9509263-13A 9509271-06A <br /> 1 <br /> QC Officer <br /> J <br />