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*' SPL BATCH QUALITY CONTROL REPORT ** PACROUSTON LABORATORY <br /> METHOD 6020/602 <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON, TEXAS 77054 <br /> ® PHONE (7t 3)660-0801 <br /> Matrix: Aqueous Batch Id: HP J960430030100 <br /> Units: pg/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 /> C 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> t % Recovery Range <br /> MTBE ND 50 44 86.0 20 - 110 <br /> Benzene ND 50 45 90.0 62 - 121 <br /> Toluene ND 50 44 88.0 66 - 136 <br /> £thylBenzene ND 50 46 92.0 70 - 136 <br /> 0 Xylene ND 50 47 94.0 74 - 334 <br /> M & P Xylene ND 100 96 96.0 77 - 140 <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 1 (Advisory) <br /> Result Recovery Result Recovery Difference RPB <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MT$g ND 20 18 90.0 18 90.0 0 20 39 - 150 <br /> $£NZENE ND 20 21 105 21 105 0 25 39 - 150 <br /> TOLUENE ND 20 20 100 20 100 0 26 56 - 134 <br /> cTHYLBENZENE ND 20 20 100 21 105 4.88 3B 61 - 128 <br /> O XYLENE ND 20 21 105 21 105 0 29 40 - 130 <br /> M & P XYLENE ND 40 42 105 43 108 2.82 20 43 - 152 <br /> Analyst: AA * y Values outside QC Range <br /> Sequence Date: 04/30/96 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9604A96-02A ND a Not Detected/Below Detection Limit <br /> Sample File ID: J-424A.TXO t Recovery - C( <1> - <2> 1 / <3> ) x 100 <br /> Method Blank File ID: LCS W Recovery o (<1> / <3> 1 x 100 <br /> Blank Spike File ID: J-419A.TX0 Relative Percent Difference 1 (<4> - <5> / ((<4> + <5> 1 x 0.51 x 100 <br /> Matrix Spike File ID: J-416A.TXO f**) Source: SPL-Houston Historical Data (3rd Q 195) <br /> Matrix Spike Duplicate File ID: J-417A.TXO (***] Source: SPL-Houston Historical Data (2nd Q 195) <br /> SAMPLES IN BATCH(SPL IDS 9604A96-02A 9604A96-03A 9604A84-03A 9604A96-OIA <br /> 9604003-01A 9604003-02A 9604003-03A 9604CO3-04A <br /> 9604003-05A 9604003-06A 9604CO3-09A 9604003-10A <br /> 9604003-11A 9604CD3-12A 9604CO3-13A 9604CO3-07A <br /> 9604CD3-08A 9604A43-06A 9604A44-OIA <br /> � R <br /> 1 <br /> QC Officer ` <br /> I <br />