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SPL BATCH QUALITY CONTROL REPORT ** <br /> HOUSTON LABORATORY <br /> METHOD 8020*** 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> Batch Id: RP_0970530115900 PHONE(713)660-0901 <br /> Units: µg/L <br /> L A B O R A T O R Y CONT R O L SAMPL 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 42 84.0 20 - 110 <br /> Benzene ND 50.0 44 88.0 62 - 121 <br /> Toluene ND 50.0 48 96.0 66 - 136 <br /> Ethyl-Benzene NO 50.0 51 102 70 - 136 <br /> O-Xylene ND 50.0 49 98.0 74 - 134 <br /> M and P Xylene ND 100.0 96 96.0 77 - 140 <br /> M A T R I X S P I K E S <br /> S P I K R Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limits(***) <br /> C O M P O U N D S Results Added Duplicate Relative V (Advisory_) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE 1700 20 1600 NC 1500 NC NC 20 39 - 150 <br /> BENZENE 26 20 42 80.0 38 60.0 28.6 * 25 39 - 150 <br /> TOLUENE 17 20 29 60.0 33 80.0 28.6 * 26 56 - 134 <br /> ETHYL-BENZENE 8.8 20 25 81.0 25 81.0 0 38 61 - 128 <br /> O-XYLENE 8.8 20 23 71.0 29 101 34.9 29 40 - 130 <br /> M AND P XYLENE 2.9 40 35 80.2 36 82.8 3.19 20 43 - 152 <br /> Analyst: DAO * Values Outside QC Range. r - Data outside Method Specification limits. <br /> Sequence Date: 05/30/97 NC - Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9705C36-02A ND - Not Detected/Below Detection Limit <br /> Sample File ID: OOF7008.TX0 % Recovery - [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File lb: LCS t Recovery - (<1> / <3> 1 x 100 <br /> Blank Spike File ID: 007E266A.TXO Relative Percent Difference - 1 (<4> - <5> I / [(<4> + <5> } x 0.51 x 100 <br /> Matrix Spike File ID: 0OF7001.TX0 Source: SPL-Houston Historical Data (4th Q 195) <br /> Matrix Spike Duplicate File ID: 0OF7002.TX0 [***) Source: SPL-Houston Historical Data (3rd Q 196) <br /> SAMPLES IN BATCH(SPL ID) : 9705C36-OlA 9705C36-02A 9705C36-03A 9705C36-04A <br /> 9705C36-05A 9705C36-06A 9705C36-07A 9705C36-08A <br /> 9705C36-09A 9705C40-01A 9705040-02A 9705C40-03A <br /> 9705040-04A 9705C40-05A 9705040-06A 9705C40-07A <br /> 9705C40-08A 9705C40-09A 9705C44-01A 9705092-03A <br />