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819 Striker Avenue,Suite 8 <br /> ['p Sacramento,CA 95834 <br /> V•.q l.71�Ola (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> EMCON/IT-Sacramento Project: ARCO 2186,Stockton,CA Sampled: 4/3/00 <br /> 1433 N.Market Blvd.,#I Project Number: 803883 Received: 4/3/00 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 4117100 <br /> Total Pfii& b10 Hydrocarbons(C6-02),BTEX and MTBE by.I)FIS LM/Quality Cbn`trol <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: 0040069 Date Prepared:_4.110100 Extraction Method: EPA 50301-tMe01 <br /> Blank 0040069-BLK1 <br /> Purgeable Hydrocarbons' F. 4/10/00 ND ug/l 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-Trifluorotoluene 10.0 9.66 60.0-140 96.6 <br /> LCS 0040069-BS1 <br /> Benzene y 4/10100 10.0 8.39 ug/l 70.0-130 83.9 <br /> Toluene " 10.0 8.52 70.0430 85.2 <br /> Ethylbenzene 10.0 8.73 70.0-130 87.3 <br /> Xylenes(total) 30.0 25.9 70.0-130 86.3 <br /> Methyl tert-butyl ether IU 7.07 70.0-130 70.7 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.63 60.0-140 96.3 <br /> Matrix Spike 0040069-MS1 S004003-05 <br /> Benzene 4/10/00 10.0 ND 8.84 ug/1 60,0-140 88.4 <br /> Toluene 10.0 ND 8.97 60.0-140 89.7 <br /> Ethylbenzene 10.0 ND 9,20 60.0-140 92.0 <br /> Xylenes(total) 30.0 ND 27.5 60.0-140 91.7 <br /> Methyl tert-butyl ether _ " 10.0 ND 8.76 60.0-140 87.6 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 1 9.80 60.0-140 98.0 <br /> Matrix Spike Dup „f 0040069-MSD1 S004003-05 <br /> Benzene 4/10100 10.0 ND 8.69 ug/I 60.0-140 86.9 25.0 1.71 <br /> Toluene 10.0 ND 8.90 60.0-140 89.0 25.0 0.783 <br /> Ethylbenzene 10.0 ND 9.12 60.0-140 91.2 25.0 0.873 <br /> Xylenes(total) 30.0 ND 27.0 60.0-140 90.0 25.0 1.87 <br /> Methyl tent-butyl ether 10.0 ND 7,86 60.0-140 78.6 25.0 " 10.8 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.40 60.0-140 94.0 <br /> Batch. 0040091 Date Prepared: 4110100 Extraction Method: EPA 5030B McOH <br /> Blank 0040091-BLKI <br /> Purgeable Hydrocarbons 4/10100 ND ug/l 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 tent-butyl ether ND 2.50 <br /> Sequoia Analytical Sacramento *Refer to end of report for text of notes and definition.. ` <br /> vyF'� <br /> Page 5 of 9 <br /> R <br />