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SPL BATCH QUALITY CONTROL REPORT "* HOUSTON LABORATORY <br /> Method 8020A*** 88801NTERCHANGE DRIVE <br /> HOUSTON TEXAS 17054 <br /> © <br /> Batch Id VARE980323103200 PHONE 7 3) 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 R Method Spike Blank Spike_ QC Limits(••) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> c2> <3> <1> t % Recovery Range <br /> MTBE ND 50 44 88 0 72 - 128 <br /> Benzene ND 50 49 98 0 61 - 119 <br /> Toluene ND 50 50 100 65 - 125 <br /> EthylBenzene ND 50 49 98 0 70 - X18 <br /> 0 Xylene ND 50 49 98 0 72 - 117 <br /> M & P Xylene ND 100 99 49 0 72 - 116 <br /> M A T R I X S 1 K E q <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 Adviso ) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> 7 <4> <1> <5> Max Recovery Range <br /> MTBE 1 5 20 16 72 5 15 67 5 7 14 20 39 - 150 <br /> BENZENE ND 20 17 85 0 16 80 0 6 06 21 32 - 164 <br /> TOLUENE ND 20 17 85 0 16 BO 0 6 06 20 38 - 159 <br /> ETHYLBENZENE NO 20 17 85 0 16 80 0 6 06 19 52 - 142 <br /> O XYLENE ND 20 I7 85 0 16 80 0 6 06 18 53 - 143 <br /> M & P XYLENE ND 40 35 87 5 33 82 5 5 88 17 53 - 144 <br /> = values outside QC Range due to Matrix Interfere-ice (except RPD) <br /> Analyst VHZ a = Data outside Method Spec °ication limits <br /> Sequen-_ Date 03/24/98 NC = Not Calculated (Sample exceeds spike by facto 4 or more) <br /> SPL ID of sample -piked 9803992-06A ND = Not Detected/Below Detection Limit <br /> Sample File ID E_C,348 TXO % Recovery = {( <1> - c2> ) / <3> ) x 100 <br /> Method Blank File ID LCS I Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID E_C4026 TXO Relative Percent Difference = 1 (<4> - <5> / [4<4> + <5> ) x 0 53 x 100 <br /> Matrix Spike File ID E_C3345 TXO (**) = Source SPL-Houston Historical Data ST Q 197) <br /> Matrix Spike Duplicate File ID E_C3346 TXO ("*) = Source SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL IDL 9803274-OIA 9803992-07A 9803992-OBA 9803992-09A <br /> 9803274-02A 9803274-03A 9803274-04A 9803984-OIA <br /> 9803984-02A 9803984-03A 9803984-04A 9803984-OBA <br /> 9603992-06A 9803992-OIA 9803992-03A 9803992-04A <br /> 9803992-02A <br />