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SPL BA'T'CH QUALITY CONTROL REPORT ** <br /> Method 802OA*=* HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> QQ HOUSTON, TEXAS 77054 <br /> UnitsBatch Id: HP_S980925103900 PHONE(713)660-0901 <br /> ; ug/L <br /> 1 <br /> L A B 0 R A T O R Y C O N T R O L S AM — . <br /> S P I K E <br /> Method Spike Blank Spike QC Limits(**) <br /> C 0 M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> ry <br /> <2> <3> <1> % W Recovery Range <br /> MTBE ND 50 55 110 <br /> 72 - 128 <br /> Benzene ND 50 50 100 <br /> 61 - 119 <br /> Toluene NO 50 51 <br /> 142 65 - 125 <br /> £thylaonzene ND 50 55 110 <br /> 70 - 118 <br /> O Xylene NO 50 51 102 72 - 117 <br /> M & P Xylene NO 100 100 100 <br /> 72 - I16 <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 *** <br /> P / 4C Limits(***) <br /> C 0 M P O U N D S Results Added _ Duplicate Relative !t _ (Advisory) _ <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE NO 20 25 125 27 135 7.69 20 39 - 150 <br /> BENZENE ND 20 23 115 23 115 0 21 32 - 164 <br /> TOLUENE ND 20 24 120 24 120 0 <br /> 20 38 - 159 <br /> ETHYLBENZENE NO 20 25 125 25 125 0 <br /> 19 52 - 142 <br /> 0 XYLENE ND 2023 115 24 124 4-26 18 53 - 143 <br /> M & P XYLENE ND 40 47 118 48 120 1.68 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RPD) <br /> Analyst: YN « = Data outside Method Specification limits. <br /> Sequence Date: 09/26/98 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL TD of sample spiked: 9809792-02A ND = Not Detected/Below Detection Limit <br /> Sample File ID: S_I3198.TX0 % Recovery = [( <1> - <2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS k Recovery = (<I> / <3> ) x 100 <br /> Blank Spike File ID: S_I3207.TXO Relative Percent Difference 1 (<4> - c5> <br /> / [(c4> + <5> ) x 0.5] x 100 <br /> Matrix Spike File ID: S_I3194.TX0 (**) = Source: SPL-Houston Historical Data (1ST Q 197) <br /> Matrix Spike Duplicate File ID: S_I3195.TXO (***) = Source: SPL-Houston Historical Data (1ST Q '97) <br /> SAMPLES IN BATCH(SPL ID) , 9809792-01A 9609792-02A 9809792-03A 9809787-03A <br /> 9609792-04A 9809792-OSA 9809792-06A 9809911-05A <br /> 9809911-06A 9809787-02A 9809787-04A 9809787-05A <br /> 9809787-06A <br />