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Sequoia 819 Avenue S <br /> Sacramento <br /> 958mento CA 95834 <br /> 4D <br /> (916)921-9600 <br /> FAX(916)921-0 100 <br /> 4WAnalytical www sequoialabscorn <br /> SECOR International -Rancho Cordova Project ARCO 2133 Stockton,CA Sampled 9/13/00 to 9114100 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 9114/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 9128/00 <br /> Total Purgeable Hydrocarbons(C6-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 0090246 Date Prepared 9125/00 Extraction Method EPA 5030E(MeOH) <br /> Blank 0090246-BL K 1 <br /> Purgeable Hydrocarbons 9/25/00 ND ug/l 500 <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-Trifluorotoluene 100 978 600-140 978 <br /> LCS 0090246-BSI <br /> Benzene 9/25100 100 937 ug/1 700-130 93 7 <br /> Toluene 100 996 700-130 996 <br /> �ftenzenc 10 0 9 55 700-130 955 <br /> A es(total) 300 276 700-130 920 <br /> Methyl tert-butyl ether 10 0 996 700-130 996 <br /> Surrogate a a a-Tnfluorotoluene 100 109 600-140 109 <br /> Matrix Spike 0090246-MSI 5009213-11 <br /> Benzene 9/25/00 10 0 ND 908 ug/I 600-140 908 <br /> Toluene 10 0 ND 970 600-140 970 <br /> Ethylbenzene 10 0 ND 944 600-140 944 <br /> Xylenes(total) 300 ND 272 600-140 907 <br /> Methyl tert-butyl ether __ lu ___ " 100 ND_ 9 83 600-140 98 3 <br /> Surrogate a,a a-Trifluorotoene 11 100 978 600-140 978 <br /> Matrix Spike Duo 0090246-MSDI 5009213-11 <br /> Benzene 9/25100 100 ND 881 ugll 600-140 881 25 0 3 02 <br /> Toluene 100 ND 893 600-140 893 250 827 <br /> Ethylbenzene 100 ND 931 600-140 931 25 0 1.39 <br /> Xylenes(total) 300 ND 266 600-140 88 7 25 0 2 23 <br /> Methyl tent-butyl ether _ _ 100 _ ND 9 81 600-140 981 25 0 0204 <br /> Surrogate a a,a-Trifluorotoluene 100 987 600-140 98 7T <br /> Batch 0090247 Date Prepared 9126100 Extraction Method EPA 50306 McOH <br /> Blank 0090247-BLK 1 <br /> Purgeable Hydrocarbons 9126/00 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xs(total) ND 0 500 <br /> ter(-butyl ether ND 250 <br /> Sequoia Analytical-Sacramento *Refer to end of report for teat of nates and definarons <br /> Page 7 of 10 <br /> r� <br />