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ww SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> r METHOD 8020*** 8880 INTERCHANGE DRIVE <br /> O HOUSTON,TEXAS 77054 M090 ,9Z <br /> PHONE(713)660-0901 <br /> Matrix: Aqueous Batch Id: HP_S980116100600 <br /> Units: Ag/L <br /> L A B O R A T O R Y C ONTROL SAM PILE <br /> S P I K E Method Spike _Blank _ Spike QC Limits(**) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> Y <br /> <2> <3> <1> % % Recovery Range <br /> MTBE NO 50 48 96.0 72 - 128 <br /> Benzene NO 50 51 102 61 - 119 <br /> Toluene NO 50 50 100 65 - 125 <br /> Ethyl—Benzene NO 50 48 96.0 70 - 118 <br /> 0-Xylene NO 50 51 102 72 - 117 <br /> M and P Xylene NO 100 100 100 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 OC Limits(***) <br /> C O M P O U N D S Results Added Duplicate Relative % (Advisory) <br /> Result Recovery Result Recovery Difference RPD ^ <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE NO 20 17 85.0 18 90.0 5.71 20 39 - 150 <br /> BENZENE NO 20 19 95.0 18 90.0 5.41 21 32 - 164 <br /> TOLUENE NO 20 19 95.0 17 85.0 11.1 20 38 - 159 <br /> ETHYL—BENZENE NO 20 18 90.0 17 85.0 5.71 19 52 - 142 <br /> 0-XYLENE NO 20 20 100 18 90.0 10.5 18 53 - 143 <br /> M AND P XYLENE NO 40 39 97.5 36 90.0 8.00 17 53 - 144 <br /> * = Values outside QC Range due to Matrix Interference (except RAD) <br /> Analyst: VHZ n = Data outside Method Specification Limits. <br /> Sequence Date: 01/16/98 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9801579-01A NO = Not Detected/Below Detection Limit <br /> Sample Fite ID: S_A2130.TXO % Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID: LCS % Recovery = (<l> / <3> ) x 100 <br /> Blank Spike File ID: S_A2121.TXO Relative Percent Difference = 1(<4> - <5> 1 / [(<4> + <5> ) x 0.51 x 100 <br /> Matrix Spike File ID: S_A2125.TXO (**) = Source: SPL-Houston Historical Data (1sT Q 197) <br /> Matrix Spike Duplicate Fite ID: S_A2126.TXO (***) = Source: SPL-Houston Historical Data (1ST Q 197) <br /> SAMPLES IN BATCH(SPL ID): 9801349-08A 9801545-OIA 9801579-01A 9801579-02A <br /> 9801334-01A <br />