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1 <br /> AN I EIV Inc <br /> Analytical & Environmental Chemistry <br /> LABORATORY CONTROL SAMPLES <br /> Method VOLATILE AROMATICS AND TPH AS GASOLINE BY GC/PID <br /> Date Aquired 05/05/98 <br /> Expressed as mass(ng) <br />' Amount Amount LCS %Rec <br /> Analyte Added Found Rec Limits <br /> Methyl-tent-butyl Ether 40 37 93% 80-130 <br />' Benzene 20 21 107% 85-120 <br /> Toluene 20 22 109% 85-120 <br /> Ethylbenzene 20 22 112% 85-120 <br /> m p-Xylenes 20 21 107% 85-120 <br /> o-Xylene 20 21 106% 85-120 <br /> "PH-Gasoline 1250 1166 93% 65-140 <br /> Surrogates LSC-8020M Batch ID 0505-04 <br /> a a a-TFT-FID 102% 60-130 <br /> 4-BFB-FID 108% 55-950 <br /> s-BFB-PID 110% 65-140 <br /> Surrogates LSC-GASOLINE Batch ID 0505-05 <br /> a a a-TFT-FID 89% 60-130 <br /> 4-BFB-FID 126% 55-150 <br /> 4-BFB-PID 127% 65-140 <br /> =Values outside of QC limits <br /> LCS Recovery 0 out of 7 outside limits <br /> I � <br /> I <br /> 1 <br /> 455 RESERVATION ROAD, SUITE G • MARINA CA 93933 • (408) 883-0123 • FAX (408) 883-0122 <br /> recvOed paper <br /> CC LCS <br />