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AN I EN Inc <br /> Analytical & Environmental Chemistry <br /> LABORATORY CONTROL SAMPLES <br />' Method VOLATILE AROMATICS AND TPH AS GASOLINE BY GC/PID <br /> Date Aquired 04/06/98 <br /> Expressed as mass(ng) <br /> Amount Amount LCS %Rec <br /> Analyte Added Found Rec Limits <br /> Methyl-tert-butyl Ether 40 39 97% 83-123 <br />' Benzene 20 20 102% 69-111 <br /> Toluene 20 21 107% 89-113 <br /> Ethylbenzene 20 20 102% 87-113 <br /> m,p-Xylenes 20 20 101% 88-118 <br /> o-Xylene 20 21 104% 86-115 <br /> TPH-Gasotine 1250 1200 96% 68-138 <br />' Surrogates LSC-8020M Batch 0 0406-04 <br /> a,a a-TFT-FID 106% 58-127 <br />' 4-BFB-FID 107% 55-151 <br /> 4-BFB-PID 105% 68-137 <br /> Surrogates LSC-GASOLINE Batch ID 0406-05 <br /> a,a,a-TFT-FID 92% 58-127 <br /> 4-BFB-FID 110% 55-151 <br /> 4-BFB-PID 113% 68-137 <br /> =Values outside of QC limits <br /> LCS Recovery 0 out of 7 outside limits <br /> �1 <br /> _1 <br /> 455 RESERVATION ROAD, SUITE G • MARINA, CA 93933 • (408) 883-0123 • FAX (408) 883-0122 <br />' recycled caper <br /> QC-LCS <br />