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AIV EIV Inc <br /> Anafyrrcal & Environmental Chemistry <br /> LABORATORY CONTROL SAMPLES <br /> Method VOLATILE AROMATICS AND TPH AS GASOLINE BY GC/PID <br /> Date Aquired 02126/98 <br /> Expressed as mass(ng) <br /> Amount Amount LCS %Rec <br /> Analyte Added Found Rec Limits <br /> Methyl-tert-butyl Ether 40 40 99% 83-123 <br /> Benzene 20 20 102% 89-111 <br /> Toluene 20 21 106% 89-113 <br /> Ethyibenzene 20 21 106% 87-113 <br /> m p-Xylenes 20 21 105% 88-118 <br /> o-Xylene 20 21 105% 86-115 <br /> TPH-Gasoline 1250 1275 102% 68-138 <br /> Surrogates LSC-8020M Batch iD 0227-04 <br /> a a a-TFT-FID 104% 58-127 <br /> 4-BFB-FID 104% 55-151 <br /> ' 4-BFB-PID 107% 68-137 <br /> Surrogates LSC-GASOLINE Batch ID 0227-05 58-127 <br /> a,a a-TFT-FID 91% <br /> 4-BFB-FID 117% 55-151 <br /> 4-BFB-PID 111% 68-137 <br /> '=Values cutstde of QC limits <br /> LCS Recovery 0 out of 7 outside limits <br /> _w4 <br /> 1 ;I <br /> ' - a Y 8 883-012 3 • FAX (408) 883-0122 <br /> 455 RESERVATION ROAD, SUITE G • MARINA CA .,3933 (40 )_ _ - <br /> trecvcrecf paper QC-LCS <br />