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** SPL BATCH QUALITY CONTROL REPORT ** PAGE 1 ® METHOD 602/8020 Matrix: Aqueous Batch Id: HP_S950329232300 Units ug/L L A 8 0 R A T O R Y C 0 N T R 0 L S A M P L E 5 P i K E Method Spike Blank Spike QC Limits(**) C 0 M P 0 U N D S Blank Result Added Result Recovery (Mandatory) <2> <3> <1> X % Recovery Range MTBE NO 50 46 92 0 56 - 135 Benzene ND 50 42 84 0 61 - 123 Toluene NO 50 43 86 0 62 - 122 EthyLBenzene NO 50 46 92 0 56 - 119 0 Xylene ND 50 47 94 0 32 - 160 M & P Xylene ND 100 100 100 32 - 160 M A T R I X S P I K E S I S P I K E Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limits(***) C Oil P 0 U N D S Results Added Duplicate Relative X (Advisory) Result Recovery Result Recovery Difference RPD <2> <3> <1> <4> <1> <5> Max. Recovery Range MTBE ND 20 16 80 0 16 80 0 0 20 39 - 150 Benzene ND 20 17 85.0 17 85 0 0 25 39 - 150 Toluene NO 20 16 80 0 16 80 0 0 26 56 134 Ethyl8enzene ND 20 17 85 0 17 85 0 0 38 61 - 128 0 Xylene ND 20 16 BO 0 16 80 0 0 29 40 130 M & P Xylene ND 40 33 82 5 32 80 0 3 08 20 43 - 152 Analyst AF * = Values Outside QC Range Sequence Date 03/29/95 NC = Not Calculated (Sample exceeds spike by factor of 4 or more) SPL ID of sample spiked 9503988-16A ND = Not Detected/Below Detection Limit Sample File ID SS—861 TXO % Recovery = [( <1> - <2> ) / <3> ) x 100 Method Blank File ID LCS % Recovery = (<1> / <3> ) x 100 Blank Spike File ID SS_,854 TXO Relative Percent Difference = I(<4> - <5> 1 / [(<4> + <5> } x 0.51 x 100 Matrix Spike File ID SS-862 TXO (**) = Source SPL-Houston Historical Data Matrix Spike Duplicate File ID SS-863 TXO (***} = Source SPL-Houston Historical Data F , ' I SAMPLES iN BATCH_CSPL ID): 9503A37-09A 9503A95-05A 9503A37-10A 9503A95-07A I I 9503A95-06A 9503A95-04A 9503A95-03A 9503A95-02A ! 9503A95-01A 9503A95-OSA 9503988-12A 9503988-19A I, 9503A37-11A 9503988-10A 9503988-,01A 95D3988-14A1 I 9503988-04A 9503,E988;'18A 9503988-16A I r Idelis Williams, Q officer !I E� I E I ql p �j it 00