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i <br /> AB4124101 <br /> POSITIVE <br /> 781 East Washington Blvd., Los Angeles, CA 90021 <br /> LAB SERVICE (213) 745-5312 FAX (213) 745-6372 <br /> QUALITY CONTROL DATA <br /> i <br /> CLIENT: Orion Environmental, Inc. BATCH No: 11138015/8021 <br /> REPORT NO: 20010838 DATE EXTRACTED: 04/23/01 <br /> MATRIX: SOIL <br /> • DATE ANALYZED: 04/23/01 <br /> METHOD: EPA 8021 B/801 5B BTEX QC SAMPLE: 20010846-001 <br /> GAS 20010846-004 <br /> SAMPLE AMT AMT SPK REC <br /> RESULTS SPIKED REC. % ACCEPT <br /> PARAMETER UGIKG UG/KG UG1KG REC RANGE(%) RPD <br /> MTBE S 0 40 39.4 99% <br /> DS 0 40 38.3 96% 72-144 3% <br /> LCS '500 564 113% 61-134 <br /> BENZENE S 0 - 40 35.7 89% <br /> DS 0 40 33.5 84% 78-130 6% <br /> LCS 500 566 113% 73-122 <br /> TOLUENE S 0 :40 35.3 88% <br /> i DS 0 40 32.3 81% 77-131 9% <br /> LCS 500 567 113% 71-121 <br /> ETHYLBENZENE S 0 40 29.8 75% <br /> DS 0 '40 26.3 66% 72-137 12% <br /> LCS 500 498 100% 71-120 <br /> XYLENES S 0 120 98.0 82% <br /> DS 0 120 87.0 73% 72-138 12% <br /> LCS 1,500 1628 109% 69-120 <br /> SURROGATE S 0 150 128 85% <br /> TRIFLUOROTOLUENE DS 0 150 131 87% 72-144 2% <br /> LCS 15.0 140 93% 61-134 <br /> GASOLINE S 0 910 724 80% <br /> DS 0 910 770 1 85% 65-135 6% <br /> LCS 4550 1 4138 1 91% 1 70-146 <br /> *Low recovery may be doe to matrix interference. LCS is within'acceptance range, therefore data is valid. <br /> ji <br /> S = Spike <br /> DS = Duplicate Spike <br /> LCS = Laboratory Control Sample <br /> LCSD = Laboratory Control Sample Duplicate <br /> RPD = Relative Percent Difference <br /> ND = None Detected <br />