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• SPL BATCH QUALITY CONTROL REPORT `* HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> Batch Id: VARD980719224100 PHONE(713)660-0901 <br /> 0Units: uq/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 /> <2> <3> <1> $ Recovery Range <br /> MTBE ND 50 54 108 72 - 128 <br /> Benzene ND 50 54 108 61 - 119 <br /> Toluene ND 50 55 110 65 - i25 <br /> EthylBenzene ND 50 55 110 70 - 118 <br /> 0 Xylene ND 5o 54 108 72 - 117 <br /> M & P Xylene ND 100 110 110 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 13 20 38 125 38 125 0 20 39 - 150 <br /> BENZENE ND 20 20 100 22 110 9.52 21 32 - 164 <br /> TOLUENE ND 20 20 100 21 105 4.88 20 38 - 159 <br /> ETHYLBENZENE ND 20 18 90.0 20 100 10-5 19 52 - 142 <br /> 0 XYLENE ND 20 19 95.0 21 105 10.0 18 53 - 143 <br /> M & P XYLENE ND 40 36 90.0 40 100 10.5 17 53 - 144 <br /> * Values outside QC Range due to Matrix interference (except RPD) <br /> Analyst: HS a = Data outside Method Specification limits. <br /> Sequence Date: 07/19/98 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9807837-OIA ND = Not Detected/Below Detection Limit <br /> Sample File ID: D_G2223.TXO V Recovery = [( <1> - <2> ) / <3> 1 x 100 <br /> Method Blank File ID: LCS Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID: D_G2215.TXO Relative Percent Difference = 1 (<4> - <S> ! / [(<9> + <5> ) x O.S) x 100 <br /> Matrix Spike File ID: D_G2218.TX0 (**) Source: SPL-Houston Historical Data (1st Q '97) <br /> Matrix Spike Duplicate File ID: D_G2219.TXO ('**) Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID).:_ 9807329-07A 9807331-IIA 9807855-OIA 9807940-03A <br /> 9807940-02A 9807837-OIA 9807838-OIA 9607331-12A <br />