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* SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> PHONE(713)660-0901 <br /> Matrix: Aqueous Batch Id: HP_5990104150300 <br /> :j Units: ug/L <br /> L A B 0 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 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> r7/ <br /> <2> <3> cl> $ Recovery Range <br /> MTBE ND 100 100 100 72 - 128 <br /> Benzene ND 100 9S 95.0 61 - 119 <br /> Toluene ND 100 93 93.0 65 - 125 <br /> EthylBenzene ND 100 94 94.0 70 - 118 <br /> 0 Xylene ND 100 94 94.0 72 - 117 <br /> M & P Xylene ND 200 190 95.0 72 - 116 <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 t (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max_ Recovery Range <br /> MTBE 4,1 20 33 144 31 134 7.19 20 39 - 150 <br /> BENZENE ND 20 24 120 24 120 0 21 32 - 164 <br /> TOLUENE ND 20 25 125 26 130 3.92 20 38 - 159 <br /> ETHYLBENZENE ND 20 24 120 24 120 0 19 52 - 142 <br /> -- - 0 XYLENE ND 20 25 12S 25 125 0 18 53 - 143 <br /> M & P XYLENE ND 40 48 120 48 120 0 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: CJ c = Data outside Method Specification limits. <br /> Sequence Date: 01/04/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL TD of sample spiked: 9812C65-04B ND = Not Detected/Below Detection Limit <br /> Sample File ID: S A1013.TX0 %, Recovery = (( <1> - c2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS % Recovery = (<1> / <3> } x 100 <br /> Blank Spike File ID: S_A1003.TXO Relative Percent Difference = 1 (<4> - <5> I / ((<4> + <S> } x 0.5] x 100 <br /> Matrix Spike File ID: S_A104?.TXO {**} Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: S_A1048.TX0 {***} = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID): 9901031-01A 9901031-02A 9901031-03A 9901031-04A <br /> 9901031-OSA 9901031-06A 9901031-07A 9901031-OSA <br /> 9901031-09A 9812D20-06A 9901031-02A 9901031-06A <br /> 9901031-07A 9901031-OIA 9901031-03A 9901031-04A <br /> 9901031-OSA 9812C46-OIA 9812065-048 9812C65-03B <br /> 9912C6S-07B <br />