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* FL BATCH QUALITY CONTROL REPORT •* PAGE HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> HOUSTON <br /> PHONE( 7 3E 4 <br /> 660 090XAS 5 <br /> Matrix Aqueous Batch Id 11P P950620090500 <br /> Units mg/I, <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 O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> # 4 Recovery Range <br /> Benzene ND 50 55 110 61 - 123 <br /> Toluene NO 50 54 108 62 - 122 <br /> EthylBenzene ND 50 57 114 56 - 119 <br /> 0 Xylene ND 50 58 116 32 - 160 <br /> M & P Xylene ND 100 128 128 32 - 160 <br /> MATRIX 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 I Recovery Range <br /> Benzene ND 20 22 110 22 110 0 25 39 - 150 <br /> Toluene 1 20 22 105 22 105 0 26 56 - 134 <br /> EthylBenzene ND 20 21 105 21 105 0 38 61 - 128 <br /> 0 Xylene ND 20 22 110 21 105 4 65 29 40 - 130 <br />• M & P Xylene ND 40 48 120 48 120 0 20 43 - 152 <br /> Analyst TZL * m values Outside QC Range <br /> Sequence Date 06/20/95 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked 9506326-03E ND - Not Detected/Below Detection Limit <br /> Sample File ID PP_639 TXO % Recovery a [( <I> - <2> ) / <3> ] x 100 <br /> Method Blank Pile ID LCS % Recovery - (<1> / <3> ) x 100 <br /> Blank Spike File ID PP-597 TXO Relative Percent Difference a I (c4> - <5> / [(<4> + <5> ) x 0 51 x 100 <br /> Matrix Spike File ID PP_634 TXO (**} Source SPL-Houston Historical Data <br /> Matrix Spike Duplicate File ID PP,_638 TXO [***} Source SPL-Houston Historical Data <br /> SAMPLES TN_BATCH(SPL ID) 9506690-04A 9506692-03A 9506692-02A 9506326-035 <br /> 9506492-03A 9506690-01A 9506690-02A 9506692-01A <br /> 9506692-05A 9506692-06A 9506692-04A 9506690-03A <br /> 9506492-OIA <br /> Idelis Williams, QC Officer <br />