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Suite <br /> Sequoia 819acrStriker Avenue, 958 8 <br /> ID Analytical <br /> Sacramento,CA 95834 <br /> 1 analytical (916)921-9600 <br /> FAX{916} 921-0100 <br /> EMCON/IT-Sacramento Project: ARCO 2186, Stockton,CA Sampled: 12/3/99 <br /> 1433 N.Market Blvd.,41 Project Number: 792232 Received: 12/6199 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 12/20/99 <br /> Total Purgeable Hydrocarbons(U-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical- Sacramento <br /> Date Spike Sample QC Reporting limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 9120172 Date Prepared: 1211.3199 Extraction Method: EPA 5030E WOH <br /> Blank 9120172-BLKI <br /> Purgeable Hydrocarbons 12/13/99 ND ug/1 50.0 <br /> Benzene „ ND 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl tert-butyl ether ND " 2.50 <br /> Surrogate: a,a,a-Trijlluorotoluene 10.0 9.59 60.0-140 95.9 <br /> LCS 9120172-BS1 <br /> Benzene 12/13/99 10.0 9.10 ug/I 70.0-130 91.0 <br /> Toluene 10.0 9.42 70.0-130 94.2 <br /> Ethylbenzene 10-0 9.34 70.0-130 93.4 <br /> Xylenes{total) 30.0 27.9 70.0-130 93.0 <br /> 1 tert-butyl ether 10.0 8.24 70.0-130 82.4 <br /> gate: a,a,a-Trifluorotoluene 10.0 m 10.1 60.0-140 101 <br /> Matrix Spike_ 9120172-MS1 5912053-02 <br /> Benzene 12/13/99 10.0 ND 8.33 ug/l 60.0-140 83.3 <br /> Toluene to10.0 ND 8.93 60.0-140 89.3 <br /> Ethylbenzene 10.0 ND 8.78 60.0-140 87.8 <br /> Xylenes(total) 30.0 ND 26.3 60.0-140 87.7 <br /> Methyl tert-butyl ether 10.0 ND 7.29 60.0-140 72.9 _ <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.84 60.0-140 98.4 <br /> Matrix Spike Duo 9120172-MSDI S912053-02 <br /> Benzene 12/13/99 10.0 ND 8.66 ug/l 60.0-140 86.6 25.0 3.88 <br /> Toluene 10.0 ND 9.08 60.0-140 90.8 25.0 1.67 <br /> Ethylbenzene " ' 10.0 ND 8.99 60.0-140 89.9 25.0 2.36 <br /> Xylenes(total) 30.0 ND 27.1 " 60.0-140 90.3 25.0 2.92 <br /> Methyl tert-butyl ether 10.0 ND 7.93 60.0-140 79.3 25.0 8.41 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.79 60.0-140 97.9 <br /> Batch: 9120173 Date Prepared: 12114199_ Extraction Method: EPA 5030E Me0 <br /> Blank 9120173-BLKI <br /> Purgeable Hydrocarbons 12/14/99 ND ug/I 50.0 <br /> Benzene ND 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl tert-butyl ether ND 2.50 <br /> is Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 5 of 9 <br />