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* SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 BOBO INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> n PHONE(713)660-0901 <br /> Matrix: Aqueous Batch Id: HP_U990111065200 <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 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <br /> e2> <3> <1> t Recovery Range <br /> MTBE ND 100 120 120 72 - 128 <br /> Benzene ND 100 100 100 61 - 119 <br /> Toluene ND 100 110 210 65 - 125 <br /> EthylBenzene ND 100 100 100 70 - 118 <br /> 0 Xylene ND 100 100 100 72 - 117 <br /> M & P xylene ND 200 210 105 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 k (Advisoryâ–º <br /> Result Recovery Result Recovery Difference RPD <br /> c2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE 49 20 69 100 66 85.0 16.2 20 39 - 150 <br /> BENZENE ND 20 20 100 21 105 4.88 21 32 - 164 <br /> TOLUENE ND 20 20 100 20 100 0 20 38 - 159 <br /> -r ETHYLBENZENE ND 20 19 95.0 20 100 5.13 19 52 - 142 <br /> O XYLENE ND 20 19 95.0 19 95,0 0 18 53 - 143 <br /> M & P XYLENE ND 40 39 97.5 39 97.5 0 17 53 - 144 <br /> * ti Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: TB r = Data outside Method Specification limits. <br /> Sequence Date: 01/11/99 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9901146-07A ND = Not Detected/Below Detection Limit <br /> Sample File ID: U A2015.TXO 1; Recovery = (( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS t Recovery = (<1> / <3> } x 100 <br /> Blank Spike File ID: U_A2004.TXO Relative Percent Difference = I (c4> - c5> I / [(<4> + <5> ) x 0.5] x 100 <br /> Matrix Spike File ID: U_A2009.TX0 [`*) = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: U_A2010.Tx0 (***) = Source: SPL-Houston Historical Data (1st 0 197) <br /> SAMPLES IN BATCH(SPL ID): 9901067-02A 9901061-03A 9901059-07A 9901259-OSA <br /> 9901066-03A <br /> V <br />