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y 1 TestAmerica 0 ANALYTICAL TESTING CORPORATION 2960 Fuy7ax fKelLKron Dins NAtiHl1LLL TinveStins 37204 800-T63 0980 615 726 3404 Fu PROJECT QUALITY CONTROL DATA Pro3ect Number Project Name EXXONMOSIL 7-3942 Page 1 Laboratory Receipt Date 3/29/05 Matrix Spike Recovery Note If Blank is referenced as the sample spiked insufficient volume was received for the defined analytical batch for ' MS/MSD analysis on an true sample matrix Laboratory reagent water was used for QC purposes Analyte units Orig Val MS Val Spike Conc Recovery Target Range Q C Batch Spike Sample —LIST ANALYSIS— Benzene mg/1 < 0 00050 0 0533 0 0500 107 50 - 160 6475 05-A44029 Benzene mg/1 0 320 1 27 1 00 95 50 - 160 6484 05-A44D47 Toluene mg/l < 0 0005 D D484 0 0500 97 51 - 157 6475 05-A44029 Ethylbenzene mg/1 < 0 0005 0 0479 0 0500 96 47 - 159 6475 05-A44029 Xylenes (Total) mg/1 < 0 0005 0 0876 0 100 98 51 - 152 6475 05-A44029 Methyl-t-butylether mg/l < 0 OD05 0 0424 D 0500 85 36 - 159 6475 05-A44029 Methyl-t-butylether mg/l < 0 0100 1 41 1 00 141 36 - 159 6484 05-A44047 TPH )Gasoline Range) mg/I < 0 0500 1 11 1 00 111 43 - 150 6475 05-A44029 ' TPH (Gasoline Range) mg/1 < 0 100 1 09 1 00 109 43 - 150 6484 blank BTEX/GRO Surr a,a,a-TFT 4 Recovery 100 69 - 132 6475 BTEX/GRO Surr a a,a-TFT 9 Recovery 105 69 - 132 6484 ' Matrix Spike Duplicate Analyte units Orig Val Duplicate RPD Limit Q C Batch ------ ---------- ---------- ------ -- ----- ' "UST PARAMETERS— Benzene mg/1 0 0533 0 0496 7 19 30 6475 Benzene mg/l 1 27 1 50 16 61 30 6484 Toluene mg/l 0 0484 0 0550 12 77 37 6475 Ethylhenzene mg/1 0 0479 0 0607 23 57 38 6475 Xylenes (Total) mg/1 0 0876 0 117 28 74 33 6475 Methyl-t-butylether mg/1 0 0424 0 0504 17 24 34 6475 Methyl-t-butylether mg/1 1 41 1 09 25 60 34 6484 ' TPH (Gasoline Range) mg/1 1 11 1 09 1 62 27 6475 TPH (Gasoline Range) mg/1 21 9 18 7 15 76 27 6484 . BTEX/GRO Surr a,a a-TFT % Recovery 109 6475 BTEX/GRO Surr , a,a,a-TFT 8 Recovery 97 6484 protect QC continued