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Sequoia 819 acrAvenue.Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> %70 Analytical FAX(916)921-0 100 <br /> SECOR International Project: ARCO 434,Lodi,CA Sampled: 6/18/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 6/18/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 7/6/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFr/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: 9060408 Date Prepared: 6/28/99 Extraction Method: EPA 50308(MeOH) <br /> Blank 9060408-BLKI <br /> Purgeable Hydrocarbons 6/28/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> Surrogate. a,a,a-Triiluorotoluene 0.200 0.165 60.0-140 82.5 <br /> LCIS 9060408-BSI <br /> Benzene 6/28/99 0.200 0.211 mg/kg 70.0-130 105 <br /> Toluene 0.200 0.219 70.0-130 109 <br /> Ethylbenzene 0.200 0.215 70.0-130 108 <br /> Xylenes(total) 0.600 0.649 70.0-130 108 <br /> Methyl tert-butyl ether 0.200 0.194 70.0-130 97.0 <br /> Surrogate: a,a,a-Triiluorotoluene 0.100 0.166 60.0-140 83.0 <br /> Matrix Splke 9060408-MSI 5906335-04 <br /> Benzene 6/28/99 0.200 ND 0.172 mg/kg 60.0-140 86.0 <br /> Toluene 0.200 ND 0.176 60.0-140 88.0 <br /> Ethylbenzene 0.200 ND 0.176 60.0-140 88.0 <br /> Xylenes(total) 0.600 NO 0.532 60.0-140 88.7 <br /> Methyl Cert-butyl ether 0.200 ND 0.174 60.0-140 87.0 <br /> Surrogate: a,a,a-Tris luorotoluene 0.100 0.146 60.0-140 73.0 <br /> Matrix Spike Deo 9060408-MSDI 5906335-04 <br /> Benzene 6/28/99 0.200 ND 0.171 mg/kg 60.0-140 85.5 25.0 0.583 <br /> Toluene 0.200 NO 0.167 60.0-140 83.5 25.0 5.25 <br /> Ethylbenzene 0.200 NO 0.174 60.0-140 87.0 25.0 1.14 <br /> Xylenes(total) 0.600 ND 0.523 60.0-140 87.2 25.0 1.71 <br /> Methyl tert-butyl ether 0.200 ND 0.180 60.0-140 90.0 25.0 3.39 <br /> Surrogate. a,qa-Trifluoroioluene 0.100 0.149 60.0-140 74.5 <br /> Batch: 9060414 Date Prepared: 6128/99 Extraction Method: EPA 50308(MeOHI <br /> Blank 9060414-BLKI <br /> Purgeable Hydrocarbons 6/28/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> Sequoia Analytical-Sacramento *Refer to end of report for test of notes and definitions. <br /> Page 10 of 14 <br /> .P9. <br />