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SPL BATCH QUALITY CONTROL REPORT ** <br /> HousroN LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> O HOUSTON, TEXAS 77054 <br /> Batch Id: HP N9 9101412 0 9 0 0 PHONE (713)660-0901 <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 /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> o Recovery Range <br /> MTSE ND 20 17 85.0 72 - 128 <br /> Benzene ND 20 17 65.0 61 - 119 <br /> Toluene ND 20 17 85.0 65 - 125 <br /> EthylBenzene ND 20 17 85.0 70 - 118 <br /> 0 Xylene ND 20 16 80.0 72 - 117 ', <br /> M & P Xylene ND 40 34 85.0 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 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 22 110 21 105 4.65 20 39 - 150 <br /> BENZENE ND 20 21 105 19 95.0 10.0 21 32 - 164 <br /> TOLUENE ND 20 21 105 20 100 4.88 20 36 - 159 <br /> THYLBENZENE ND 20 20 100 19 95.0 5.13 19 52 - 142 <br /> O XYLENE ND 20 20 100 19 95.0 5.13 18 53 - 143 <br /> M & P XYLENE ND 40 41 102 38 95.0 7.11 17 53 - L44 <br /> * F Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: WLR a = Data outside Method Specification limits. <br /> Sequence Date: 10/14/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 991001.50-01 ND = Not Detected/Below Detection Limit <br /> Sample File ID: N_J2141.TXO % Recovery = [( <1> - <2> ) / <3> J x 100 <br /> Method Blank File ID: LCS %, Recovery = (<1> / <3> x 100 <br /> Blank Spike File ID: N�J2121.TX0 Relative Percent Difference - (<4> - <5> / [(<4> + <5> ) x O.5] x 100 11 <br /> Matrix Spike File ID: N_J2135.TX0 {+*} = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: N_J2137,TX0 (***) = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH SPL ID) : 9910310-03A 9910310-04A 9910310-OSA 9910256-OlA <br /> 9910414-OIA 9910414-02A 9910414-03A 9910414-O4A <br /> 9910310-02A 9910310-03A 9910310-OIA 9918310-02A <br />