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• 1551 Industrial RoadSequoia San Carlos, CA 94070-4111 <br /> (650) 232-9600 <br /> Analytical FAX(650) 232-9612 <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(1) Sampled 11/23/99 <br /> 6747 Sierra Court, Suite D Project Number Unocal SS#0187/Job#280045 Received 11/24/99 <br /> Dublin,CA 94568 Project Manager Deanna Harding R orted 12/10/99 <br /> Total Purgeable Hydrocarbons(C&M),BTEX and MTBE by DHS LUFT/Quality Control <br /> m Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzers Level Result Result Units Recov Limits % Limit % Notes* <br /> Matrix Spike Dun(continued) 9120016-MSDI L911275-14 <br /> Ethylbenzene 12/3/99 100 ND 900 ugll 600-140 900 250 5.36 <br /> Xylenes(total) 300 ND 267 600-140 890 250 578 <br /> Surrogate a a,a-Tnfluorotoluene 100 768 " 700-130 768 <br /> Batch- 9120017 Date Prepared 1213199 Extraction Method EPA 5030B FRM <br /> Blank 9120017-BLKI <br /> Purgeable Hydrocarbons as Gasoline 12/3/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND to0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether " ND Soo _ <br /> Surrogate a a a-Triuorotoluene 10 0 9 66 700-130 966 <br /> A9120017-BSI <br /> Benzene 1213/99 100 882 ug/1 700-130 882 <br /> Toluene 100 8 52 700-130 852 <br /> Ethylbenzene too 862 700-130 862 <br /> Xylenes(total) 300 25 9 700-130 863 <br /> Surrogate a a a-Trifluorotoluene 10 0 8 76 700-130 876 <br /> LCS 9120017-BS2 <br /> Purgeable Hydrocarbons as Gasoline 12/3/99 250 253 ug/1 700-130 101 <br /> Surrogate a a a-Trifluorotoluene 11100 118 700-130 118 <br /> Matrix Spike 9120017-MS1 L911275-03 <br /> Benzene 12/3/99 l0 0 ND 8 44 ug/1 600-140 844 <br /> Toluene EO 0 ND 790 1. 600-140 790 <br /> Ethylbenzene 100 ND 821 if 600-140 821 <br /> Xylenes(total) 300 ND 246 it600-140 82 0 <br /> Surrogate a a a-Trifluorotoluene 100 844 of 700-130 844 <br /> _Matrix Spike Dup 9120017-MSD1 L911275-03 <br /> Benzene 12/3/99 10 0 ND 8 13 ug/l. 600-140 813 250 3 74 <br /> Toluene 10 0 ND 7 73 600-140 773 25 0 2 18 <br /> Ethylbenzene 100 ND 7 84 600-140 784 250 4 61 <br /> Xylenes(total) 300 ND 23 8 600-140 79.3 250 3.35 <br /> Surrogate a,a,a-Trifluorotoluene 100 827 " 700-130 82 7 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 21 of 28 <br />