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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: HP N991015104800 PHONE(713)660,0901 <br /> Units: <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 0 17 N D S Blank Result Added Result Recovery (Mandatory) <br /> c2> <3> <1> $ a Recovery Range <br /> MTBE ND SD 45 90.0 72 - 128 <br /> Benzene ND 50 47 94.0 61 - I19 <br /> Toluene ND 50 47 94.0 65 125 <br /> EthylBenzene ND 50 48 96.0 70 118 <br /> D Xylene ND 50 47 94.0 72 117 <br /> M & P Xylene ND 100 95 95.0 72 - 116 <br /> M A T R I X S P I K E S <br /> S P 2 K E Sample Spike Matrix Spike Matrix Spike MS/MSD ¢C 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> cl> <5> Max. Recovery Range <br /> MTBE 9.2 20 28 94.0 27 89.0 5.46 20 39 - 150 <br /> BENZENE ND 20 18 90.0 19 95,0 5.41 21 32 - 164 <br /> TOLUENE ND 20 19 95.0 19 95.0 0 20 38 - 159 <br /> THYLBENZENE ND 20 18 90.0 19 95.0 5.41 19 52 - 142 <br /> D XYLENE ND 20 16 90.0 19 95.0 5.41 18 53 - 143 <br /> M & P XYLENE ND 40 37 92.5 39 97.5 5.26 17 53 - 144 <br /> * e Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: WLR a = Data outside Method Specification limits. <br /> Sequence Date: 10/15/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 99100151-03 ND = Not Detected/Below Detection Limit <br /> Sample File ID: N_J2186.TX0 % Recovery - (( <1> - <2> ) / <3> 1 x 100 <br /> Method Blank File ID: LCS % Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID: N_J2167.TX0 Relative Percent Difference = 1 (<4> - <5> 1 / [(<4> + <5> ) x 0.51 x 100 <br /> Matrix Spike File ID: N_J2181.TX0 {**) = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File 11): N J2182,TXD {***) = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID) : 9910256-01A 9910310-04A 9910310-05A 9910414-04A <br />