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Sequoia 819 Striker Avenue.'Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0 100 <br /> SECOR International Project: ARCO 434,Lodi,CA Sampled: 6/21/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 6/22/99 <br /> Sacramento,CA 95827 Project Manager: Rusty enkosky Reported: 7/9199 <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: 9060425 Date Prepared: 6129199 Extraction Method, EPA 50308( eOH) <br /> Blank 9060425-BLKI <br /> Purgeable Hydrocarbons 6/29/99 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 0.180 60.0-140 90.0 <br /> LCS 9060425-BSI <br /> Benzene 6/29/99 0.200 0.209 mg/kg 70.0-130 105 <br /> Toluene 0.200 0.226 70.0-130 113 <br /> Ethylbenzene 0.200 0.227 70.0-130 113 <br /> Xylenes(total) 0.600 0.606 70.0-130 101 <br /> Methyl tert-butyl ether 0.200 0.202 70.0-130 101 <br /> Surrogate: a,a,a-Triiluorotoluene 0.100 0.176 60.0-140 88.0 <br /> Matrix Spike 9060425-MSI 5906401-01 <br /> Benzene 6/29/99 0.200 ND 0.188 mg/kg 60.0-140 94.0 <br /> Toluene 0.200 ND 0.201 60.0-140 101 <br /> Ethylbenzene 0.200 NO 0.201 60.0-140 101 <br /> Xylenes(total) 0.600 NO 0.547 60.0-140 91.2 <br /> Methyl tert-butyl ether 0.200 NO 0.190 60.0-140 95.0 <br /> Surrogate: a,a,a-Tris luorotoluene 0.100 0.180 60.0-140 90.0 <br /> Matrix Spike Dun 9060425-MSDI 5906401-01 <br /> Benzene 6/29/99 0.200 ND 0.192 mg/kg 60.0-140 96.0 25.0 2.11 <br /> Toluene 0.200 ND 0.194 60.0-140 97.0 25.0 4.04 <br /> Ethylbenzene 0.200 NO 0.205 60.0-140 102 25.0 0.985 <br /> Xylenes(total) 0.600 NO 0.558 60.0-140 93.0 25.0 1.95 <br /> Methyl tert-butyl ether 0.200 ND 0.193 60.0-140 96.5 25.0 1.57 <br /> Surrogate: a,a,a-Triuorotoluene 0.100 0.184 60.0-140 91.0 <br /> Sequoia Analytical-Sacramento "Refer to end of report for text of notes and definitions. <br /> Page 7 of 10 <br />