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+ SPL BATCH QUALITY CONTROL REPORT •+ HOUSTON LABORATORY <br /> METHOD 8020 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> ® PHONE(713)660-0901 <br /> Matrix: Aqueous Batch Id: HP_5990I08112200 <br /> -' -{ Units: ug/L <br /> L A B O R A T O R Y C O N T R 0 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> 4 Recovery Range <br /> MTBE NO 50 49 98.0 72 - 128 <br /> Benzene NO 50 47 94.0 bl - 119 <br /> Toluene NO 50 48 96.0 65 - 125 <br /> EthylBenzene ND 50 48 96.0 70 - 118 <br /> 0 Xylene NO 50 48 96.0 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 I K S Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limits(***) <br /> C O M P O U N D S Results Added Du licate Relative i (Advisory) <br /> Result Recovery Result Recovery Difference RPD- <br /> - <2> <3> <1> <4a <1> <5> Max- Recovery Range <br /> MTBE ND 20 27 135 23 115 16.0 20 39 - 150 <br /> BENZENE NO 20 23 115 23 115 0 21 32 - 164 <br /> TOLUENE ND 20 231 115 24 120 4.26 20 38 - 159 <br /> ra ETHYLBENZENE ND 20 231 115 23 115 0 19 52 - 142 <br /> O XYLENE NO 20 24 120 23 115 4.26 18 53 - 143 <br /> M & P XYLENE ND 40 46 115 47 11B 2.5B 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: CJ : = Data outside Method Specification limits. <br /> Sequence Date: 01/08/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9901059-01A ND - Not Detected/Below Detection Limit <br /> Sample File ID: S A1161.TX0 % Recovery = [( <1a - <2a ) / <3> ] x 100 <br /> Method Blank File ID: LCS t Recovery = (<1> / <3> ) x 100 <br /> Blank Spike File ID: S_A1156.TX0 Relative Percent Difference = 1 (<4> - <5> I / ((<4> + <5> ) x 0.5] x 100 <br /> Matrix Spike File ID: S_A1168.TX0 {++} Source: SPL-Houston Historical Data (1st Q '97) <br /> Matrix Spike Duplicate File ID: S A1169.TX0 f*+*) = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID): 9901066-04A 9901067-03A 9901059-01A 9901059-04A <br /> 9901061-USA 9901059-05A <br /> i :� <br />