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Sequoia 680 Chesapeake Drive Redwood City,CA 9406 (650) 364-9600 FAX(650) 364-9Z33' <br /> 404 N.Wiget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 15)1lll� Analytical 819 Striker Avenue,Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd.North.Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> SECOR International Project: ARCO 434, Lodi,CA Sampled: 11/2/98 <br /> 9912 Business Park Drive,Ste. 100 Project Number: 7G600-037-01 Received: 11/2/98 <br /> Sacramento,CA 95827 Project Mana er: Rusty Benkosky Reported: 11/16/98 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFI-/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: 8110084 Date.Pr Dared: 11/6/98 _Extraction Method EPA 50308(MeOH) <br /> Blank 8110084-BLKI <br /> Purgeable Hydrocarbons II/9/98 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 0.100 0.202 60.0-140 101 <br /> LCS 8110084-BCI <br /> Benzene 11/9/98 0.200 0.223 mg/kg 70.0-130 112 <br /> Toluene 0.200 0.214 70.0-130 107 <br /> Ethylbenzene 0.200 0.211 70.0-130 105 <br /> Xylenes(total) 0.600 0.627 70.0-130 104 <br /> Methyl tert-butyl ether 0.200 0.215 70.0-130 108 <br /> Surrogate: a,a,a-Triiluorotoluene 0.200 0.20! 60.0-140 101 <br /> Matrix Spike 8110084-MS1 5811044-0+ <br /> Benzene II/9/98 0.200 ND 0.202 mg/kg 60.0-140 101 <br /> Toluene 0.200 ND 0.194 60.0-140 97.0 <br /> Ethylbenzene 0.200 ND 0.192 60.0-140 96.0 <br /> Xylenes(total) 0.600 ND 0.578 60.0-140 96.3 <br /> Methyl ten-butyl ether 0.200 ND 0.188 60.0-140 94.0 <br /> Surrogate. a,qa-Triuorotoluene 0.200 0.104 60.0-140 102 <br /> Matrix Spike Duo 8110084-MSDt 5811044-05 <br /> Benzene 11/9/98 0.200 ND 0.203 mg/kg 60.0-140 101 25.0 0 <br /> Toluene 0.200 ND 0.189 60.0-140 94.5 25.0 2.61 <br /> Ethylbenzene 0.200 ND 0.194 60.0-140 97.0 25.0 1.04 <br /> Xylenes(total) 0.600 ND 0.583 60.0-140 97.2 25.0 0.930 <br /> Methyl tert-butyl ether 0.200 ND 0.192 60.0-140 96.0 25.0 2.11 <br /> Surrogate a,a,a-Triuorotoluene 0.200 0.204 60.0-140 102 <br /> Sequoia 1 alytical-Sacramento "Refer to end ofreport for test ofnotes and definition$. <br /> n a C.Schneide, Laboratory Director Page 4 of 6 <br /> m <br />