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* SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> ZM10! <br /> PHONE 71 )3 660-0901 <br /> Batch Id: VARD9BO715034900 <br /> Units: ug/L <br /> L A B 0 R A T 0 R Y CONTROL SAM PLE <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 1 Recovery (Mandatory) <br /> <2> <3> <1> % t Recovery Range <br /> MTBE ND 50 41 82.0 72 128 <br /> Benzene ND 50 46 92.0 61 - 119 <br /> Toluene ND 50 49 96.0 65 - 125 <br /> EthylBenzene ND 50 47 94.0 70 - 11B <br /> 0 Xylene ND 50 46 92.0 72 - 117 <br /> M & P Xylene ND 100 92 92.0 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 % (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE ND 100 100 100 120 120 18.2 20 39 - 150 <br /> BENZENE ND 100 98 98.0 100 100 2.02 21 32 - 164 <br /> TOLUENE ND 100 97 97.0 100 100 3.05 20 38 - 159 <br /> ETHYLBENZENE ND 100 96 96.0 100 100 4.08 19 52 - 142 <br /> O XYLENE ND 100 100 100 110 110 9.52 18 53 - 143 <br /> M & P XYLENE ND 200 190 95.0 200 100 5.13 17 53 - 144 <br /> + Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: LJ/ c = Data outside Method Specification limits. <br /> Sequence Date: 07/15/98 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9807313-21D ND = Not Detected/Below Detection Limit <br /> Sample File ID: D_G2083.TX0 % Recovery = [( <1> - <2> ) / <3> 1 x 100 <br /> Method Blank File ID: LCS % Recovery - (<l> / <3> } x 100 <br /> Blank Spike File ID: D_G2074.TXO Relative Percent Difference = I (<4> - <5> I / [(<4> + <5> I x 0.51 x 100 <br /> Matrix Spike File ID: D_G2076.TX0 (+*) Source: SPL-Houston Historical. Data {1st Q 197) <br /> Matrix Spike Duplicate File ID: D_G2077.TX0 (***I = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID) : 9807223-01A 9807310-04B 9807329-03A 9807329-04A <br /> 9807329-05A 9807329-06A 9807329-07A 9807331-OIA <br /> 9607331-02A 9807331-03A 9807331-05A 9807331-07A <br /> 9807331-08A 9807331-09A <br />