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** SPL BATCH QUALITY CONTROL REPORT ** HOUSTON LABORATORY <br /> Method 8020A **w 8880 INTERCHANGE DRIVE <br /> ® HOUSTON,TEXAS 77054 <br /> /matrix. Soil Batch Id: HP_J971003062200 PHONE (713)660.0901 <br />' Units: ug/kg <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 O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> <2> <3> <1> % % Recovery Range <br /> MTBE ND 50 45 90.0 64 - 126 <br /> Benzene ND 50 45 90.0 66 - 123 <br /> Toluene NO 50 46 92.0 74 - 125 <br /> EthylBenzene ND 50 47 94.0 84 125 <br /> 0 Xylene ND 50 47 94.0 76 - 137 <br /> M & P Xytene ND 100 94 94.0 81 - 131 <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 0 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 ND 20 22 110 24 120 8.70 22 27 - 196 <br /> BENZENE ND 20 21 105 21 105 0 33 47 - 143 <br /> TOLUENE ND 20 22 110 21 105 4.65 35 46 - 148 <br /> ETHYLBENZENE ND 20 21 105 21 105 0 40 32 - 151 <br /> 0 XYLENE ND 20 21 105 21 105 0 24 35 - 143 <br /> M & P XYLENE NO 40 43 108 42 105 2.82 38 25 - 139 <br /> 1 Analyst: LJ * = Values Outside QC Range. « = Data outside Method Specification limits. <br /> Sequence Date: 10/03/97 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9710033-02A ND = Not Detected/Below Detection Limit <br /> Sample File ID: J_J7095.TX0 % Recovery = [( <1> - <2> ) / <3> ) x 100 <br /> Method Blank File ID: LCS % Recovery = (<l> / <3> )-x 100 <br /> Blank Spike File ID: J_J7088.TXC Relative Percent Difference = 1(<4> - <5> / [(<4> + <5> ) x 0.51 x 100 <br /> Matrix Spike File ID: J J7091.TX0 (**) = Source: SPL-Houston Historical Data (1st Q 197) <br /> Matrix Spike Duplicate File ID: J_J7092.TXO (***) = Source: SPL-Houston Historical Data (1st Q 197) <br />' SAMPLES IN BATCH(SPL ID): 9710033-07A 9710057-OIA 9710057-02A 9710057-03A <br /> 9710057-04A 9710033-02A 9710083-01A 9710033-01A <br /> 9710033-05A <br /> 1 <br /> 1 <br />