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S 19 Striker Avenue,Suite 8 <br /> �. Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)92 1-0 100 <br /> EMCON/Pinnacle-Sacramento Project: ARCO 2186,Stockton,CA Sampled: 9/10/99 <br /> 1433 N. Market Blvd. Project Number: 792232 Received: 9113199 <br /> Sacramento,CA 95834 Project Manager: Dave Folcy Reported: 9/27/99 <br /> Total I'u'rgeable Hydrocarbons(C6-02),BTEX aiid MTBE by DHS LUFTIQuallty 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 % Nates* <br /> Batch: 9090195 Date Prepared:-9120199 Extraction Method: EPA 5030B(P/� <br /> Blank 9090195-BLK1 <br /> Purgeable Hydrocarbons 9120199 ND ug/l 50'0 <br /> Benzene <br /> 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 5.00 <br /> Surrogate: a,a,a-Triuorotoluene 10:0 9.54 60.0-140 95.4 <br /> LCS 9090195-BSI <br /> Benzene 9120199 10.0 9.55 ugll 70.0-130 95.5 <br /> 9.26 70.0-130 92.6 <br /> Toluene 10.0 <br /> 70.0-130 92.0 <br /> Ethylbenzene 10.0 9.20 <br /> Xylenes(total) 30,0 27.5 70.0-130 91.7 <br /> yl tert-butyl ether _ 10.0 9.53 70.0-130 95.3 <br /> gate: a,a,a-Tri 10.0 9.82 60.0-140 981 <br /> Matrix Spike 9090195-MSI 5909144-12 <br /> Benzene 9120199 10.0 ND 10.0 ugll 60.0-140 100 <br /> Toluene 10.0 ND 9.98 60.0-140 99.8 <br /> Ethylbenzene 10.0 ND 9.93 60.0-140 99.3 <br /> Xylenes(total) 30.0 ND 29.6 60.0-140 98.7 <br /> Methyl tert-butyl ether 10.0 ND 11.5 60.0-140 115 <br /> Surrogate: a,a,a-Trifluoratoluene 10.0 10.1 60.0-140 101 <br /> Matrix S ike Duo 9090195-MSDI S909144-12 <br /> Benzene 9120199 10.0 ND 10.1 ugli 60.0-140 101 25.0 0.995 <br /> Toluene 10.0 ND 9.91 60.0-140 99.1 25.0 0.704 <br /> Ethylbenzene 10.0 ND 9.86 60.0-140 98.6 25.0 0.707 <br /> Xylenes(total) 30.0 ND 29.4 60.0-140 98.0 25.0 0.712 <br /> Methyl tert-butyl ether 10.0 ND 119 60.0-140 119 25.0 3.42 <br /> Surrogate: a,a,a-Trifluvrotoluene <br /> 10.0 9.93 60.0-140 99.3 <br /> Batch: 9090223 Date Prepared: 9/21/99 Extraction Method: EPA 5030E(PIT) <br /> Mink 9090223-BLK1 <br /> Purgeable Hydrocarbons 9/21/99 ND ug(I 50.0 <br /> ND ++ 0.500 <br /> Benzene <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl tert-butyl ether ND 5.00 <br /> oia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> ,per Page 5 of 9 <br /> ,Ak <br />