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AN I EV Inc <br /> Analytical & Environmental Chemistry <br /> LABORATORY CONTROL SAMPLES <br /> Method VOLATILE AROMA TICS AND TPH AS GASOLINE BY GC/PID <br /> Date Aqwred 04/03/98 <br /> Expressed as mass(ng) <br /> Amount Amount LCS %Rec <br /> Anal a Added Found Rec Limits <br /> Methyl-tert-butyl Ether 40 41 102% 83-123 <br /> Benzene 20 20 101% 89-111 <br /> Toluene 20 22 109% 89-113 <br /> Ethylbenzene 20 21 105% 87-113 <br /> m p-Xylenes 20 21 107% 88-118 <br /> o-Xylene 20 21 106% 86-115 <br /> TPH-Gasoline 1250 1189 95% 68-138 <br />' Surrogates LSC-8020M Batch ID 0403-04 <br /> a a,a-TFT-FFD 105% 58-127 <br />' 4-BFB-FID 111% 55-151 <br /> 4-BFB-PID 109% 68-137 <br /> Surrogates LSC-GASOLINE Batch ID 0403-05 <br /> a a a-TFT-FID 88% 58-127 <br /> 4-BFB-FID 109% 55-151 <br /> 4-BFB-PID 104% 68-137 <br /> '=Values outside of QC limits <br /> LCS Recovery 0 out of 7 outside limits <br /> J <br /> 1 <br /> 455 RESERVATION ROAD, SUITE G • MARINA, CA 93933 • (408) 883-0123 • FAX(408) 883-0122 <br /> recycred paper <br /> aC-LCS <br />