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(u <br /> * SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> Method 8O2OA*** 8880 INTERCHANGE DRIVE <br /> O HOUSTON. TEXAS 77054 <br /> PHONE(713)660.0901 <br /> Matrix: Aqueous Batch Id: VARE980708112500 <br /> Units. ug/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 /> I <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> cl> I 8 Recovery Range <br /> MTBE NO 50 44 88.0 72 128 <br /> Benzene ND 50 53 106 61 - 119 <br /> Toluene NO 50 52 104 65 125 <br /> EthylBenzene ND 50 52 104 70 - 11B <br /> i <br /> 0 Xylene NO 50 49 98.0 72 - 117 <br /> M & P Xylene ND 100 110 110 72 li6 <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 0 M P 0 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 /> MTBE ND 20 12 60.0 28 140 80.0 * 20 39 - 150 <br /> BENZENE NO 20 16 80.0 17 85.0 6.06 21 32 - 164 <br /> OLUENE ND 20 17 85.0 18 90.0 5.71 20 38 - 159 <br /> 14YLBENZENE ND 20 18 90.0 18 90.0 0 19 52 - 142 <br /> 0 XYLENE ND 20 16 80.0 17 85.0 6.06 18 53 - 143 <br /> M & P XYLENE ND 40 34 85.0 37 92.5 8.45 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: AA/ a = Data outside Method Specification limits. <br /> Sequence Date: 07/08/98 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9806E19-01A ND = Not Detected/Below Detection Limit <br /> Sample File ID: E_G1086.TX0 % Recovery = [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS % Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID: E_G1081.TX0 Relative Percent Difference 1 (<4> - <5> ' / (I<4> + <5> 1 x 0.51 x 100 <br /> Matrix Spike File ID: E G1082.TX0 (**} Source: SPL-Houston Historical Data (1ST Q 197) <br /> Matrix Spike Duplicate File ID: ETG1083.TXO (***} Source: SPL-Houston Historical Data (1ST Q 197) <br /> SAMPLES IN BATCH(SPL ID) : 9806E19-06A 9806$19-02A 9607220-01A 9807220-02A <br /> 9807220-03A 9807220-OSA 9807221-01A 9807221-02A <br /> 9806E19-01A 9806EI9-03A 9806E19-04A 9806E19-05A <br />