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* SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> METHOD 8020 BB80 INTERCHANGE DRIVE <br /> O HOUSTON,TEXAS 77054 <br /> A PHONE(713)660-0901 <br /> Matrix: Aqueous Batch Id: HP_U990112071600 <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 O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> % t Recovery Range <br /> MTBE ND 100 99 99.0 72 - 126 <br /> Benzene ND 100 97 97.0 61 - 119 <br /> Toluene NO 100 98 98.0 65 - 125 <br /> EthylBenzene ND 100 99 99.0 70 - 118 <br /> O Xylene ND 100 96 96-0 72 - 117 <br /> M & P Xylene ND 200 190 95.0 72 - 116 <br /> M A T R I X S P I K E S <br /> S P I R 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 I (Advisory) <br /> Result . Recovery Result Recovery Difference RPD <br /> <2> <3> Q> <4> <1> <5> Max. Recovery Range <br /> MTBE 110 20 120 NC 116 NC NC 20 39 - 150 <br /> BENZENE 44 20 66 110 66 110 0 21 32 - 164 <br /> TOLUENE ND 20 27 135 27 135 0 20 38 - 159 <br /> ETHYLBENZENE 5.6 20 30 122 30 122 0 19 52 - 142 <br /> O XYLENE ND 20 27 135 26 130 3.77 18 53 - 143 <br /> M & P XYLENE ND 40 52 130 52 130 0 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: TB c = Data outside Method Specification limits. <br /> Sequence Date: 01/12/99 NC = Not Calculated {Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9901264-02A ND = Not Detected/Below Detection Limit <br /> Sample File ID: U_A2049,TXD � Recovery = [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank Pile ID: LCS * Recovery = (<l> / <3> ) x 100 <br /> Blank Spike File ID: U_A2040.TXO Relative Percent Difference = 1 (<4> - <5> 1 / ((<4> + <5> ) x O-5] x 100 <br /> Matrix Spike File ID: U_A2042.TX0 [**} = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: U A2043.TXO {***} = Source: SPL-Houston Historical Data (1st Q 197) <br /> SAMPLES IN BATCH(SPL ID) : 9901259-07A 9901259-13A 9901259-IOA 9901261-01-A <br /> 9901261-02A 9901261-03A 9901264-OIA 9901264-03A <br /> 9901264-05A 9901264-06A 9901264-07A 9901264-OBA <br /> 9901264-09A 9901059-02A 9901264-02A 9901259-11A <br /> 9901259-06A <br /> ;i <br />