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TestlAmerica ' 1 N C 0 R P 0 R A T E D 1 PROJECT QUALITY CONTROL DATA r03ect Number: rojeet Name: EXXONMOBIL 7-3942 Page: 1 laboratory Receipt Date: 12/20/02 Matrix Spike Recovery Note If Blank is referenced as the sample spiked, insufficient volume was received for MS/MSD analysis for that method ' and the method requirements for MS/MSD analysis could not be met Analyte units prig Val --MS-Val- Spike Conc Recovery Target Range Q C Batch Spike Sample ' **UST ANALYSIS** Benzene mg/1 < 0 0005 0 0563 0 0500 113 74 - 129 2478 blank Benzene mg/l < 0 0005 0 0544 0 0500 109 74 - 129 5082 blank ' Toluene mg/1 < 0 0005 0 0543 0 0500 109 74 - 128 2478 blank Toluene mg/l < 0 0005 0 0523 0 0500 105 74 - 128 5082 blank Ethylbenzene mg/1 < 0 0905 0 0525 0 0500 105 75 - 128 2478 blank Ethylbenzene mg/l < 0 0005 0 0508 0 0500 102 75 - 128 5082 blank Xylenes (Total) mg/1 < 0 0005 0 105 0 100 105 72 - 126 2478 blank Xylenes (Total) mg/1 < 0 0005 0 101 0 100 101 72 - 126 5082 blank Methyl-t-butylether mg/1 < 0 0005 0 0516 0 0500 103 64 - 133 2478 blank Methyl-t-butylether mg/l < 0 0005 0 0525 0 0500 105 64 - 133 5082 blank TPH (Gasoline Range) mg/1 < 0 0500 1 08 1 00 108 59 - 128 2478 blank TPH (Gasoline Range) mg/l < 0 0500 1 07 1 00 107 59 - 128 5082 blank ' BTEX/GRO Surr a,a a-TFT I Recovery 101 69 - 132 2478 BTEX/GRO Surr a a a-TFT % Recovery 101 69 - 132 5082 Matrix Spike Duplicate ' Analyte units Orig Val Duplicate RPD Limit Q C Batch ' **UST PARAMETERS** Benzene mg/1 0 0553 0 0545 3 25 15 2478 Benzene mg/1 0 0544 0 0548 0 73 1S 5082 ' Toluene mg/l C 0543 0 0526 3 18 15 2478 Toluene mg/l 0 0523 0 0527 0 76 15 5082 Ethylbenzene mg/1 0 0525 0 0508 3 29 15 2478 ' Ethylbenzene mg/l 0 0568 0 0511 0 59 15 5082 Xylenes (Total) mg/l 0 105 0 102 2 90 19 2478 0.3ect QC continued 1 ' 2')(30 1 Wh h ( K' 1� Ji i1 \ DRI } \ \-,Al ii i i 1'V 37204 / 615-726-0177 / Fx� 615-726-0954 / 800-765-0980