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r A <br /> Sequoia 814 Striker Avenue.Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(9t6)91.1-0100 <br /> SECOR International-Sacramento Project: ARCO 4493, Stockton,CA Sampled: 9/24/99 <br /> 9912 Business Park Dr.,Ste. 100 Project Numbcr: 077.41844.012 Received- 9124/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 10/8/99 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE by D13S LUP'T <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> M W4 5909367-01 Water <br /> Purgeable Hydrocarbons 9090322 9/29199 9/29/99 1000 4880 ug/l I,D <br /> Benzene 10.0 173 D <br /> Toluene 10.0 ND D <br /> Ethylbenzene 10.0 262 D <br /> Xylenes(total) 10.0 ND D <br />_Methyl tert-butyl ether _ 100 _ 670 DT� <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 112 <br /> MW2 5909367-02 Water <br /> Purgeable Hydrocarbons 9090303 9/28/99 9/28/99 50.0 ND ug/1 <br /> Benzene " " 0.500 ND <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND <br /> eS(total) 0.500 ND <br /> l tert-butyl ether 5.00 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 151 % Z <br /> equoia Analytical -Sacramento "Refer to end of report jor text of notes and definitions. <br /> Page 2 of 14 <br />