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y �� 819 Striker Avenue.Suite 8 <br /> Sequoia Sacramento,CA 95 <br /> � 834 <br /> (916)921-9600 <br /> '%-0 Analytical FAX(916)921-0100 <br /> SECOR International Project: ARCO 434, Lodi,CA Sampled: 7/8/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 7/8/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 7/16/99 <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 /> lAnalyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes-1 <br /> Batch: 9070117 Date Prepared: 7/15/99 Extraction Method' FPA 50308(MPOH) <br /> Blank 9070177-BLKI <br /> Purgeable Hydrocarbons 7/15/99 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: ax,a-Triuorololuene 0.100 0.189 60.0-140 94.5 <br /> l.S 9070177-BSI <br /> Benzene 7/15/99 0.200 0.208 mg/kg 70.0-130 104 <br /> Toluene 0.200 0.224 70.0-130 112 <br /> Ethylbenzene 0.200 0.224 „ 70.0-130 112 <br /> Xylenes(total) 0.600 0.598 70.0-130 99.7 <br /> Methyl tert-butyl ether 0.200 0.203 70.0-130 101 <br /> Surrogate: a,a.a-Triiluorotoluene 0.200 0.193 60.0-140 96.5 <br /> Matrix Spike 9070177-MSI 5907105-01 <br /> Benzene 7/15/99 0.200 ND 0.216 mg/kg 60.0-140 108 <br /> Toluene 0.200 ND 0.230 60.0-140 115 <br /> Ethylbenzene 0.200 ND 0.224 60.0-140 112 <br /> Xylenes(total) 0.600 ND 0.619 60.0-140 103 <br /> Methyl tert-butyl ether 0.200 ND 0.209 60.0-140 105 <br /> Surrogate: a,a,a-Tris luorotoluene 0.100 0.216 60.0-140 108 <br /> Matrix Spike Duo 9070177-MSDI 5907105-01 <br /> Benzene 7/15/99 0.200 ND 0.222 mg/kg 60.0-140 111 25.0 2.74 <br /> Toluene 0.200 ND 0.237 60.0-140 118 25.0 2.58 <br /> Ethylbenzene 0.200 ND 0.229 60.0-140 114 25.0 1.77 <br /> Xylenes(total) 0.600 ND 0.632 60.0-140 105 25.0 1.92 <br /> Methyl cert-butyl ether 0.200 ND 0.236 60.0-140 118 25.0 11.7 <br /> Surrogate: a,a,a-Tris luorotoluene 0.200 0.113 60.0-140 112 <br /> Sequoia Analytical-Sacramento `Refer to end of report for at of notes and definitions. <br /> Page 4 of 6 <br />